Index Committees...... 5 Organizing Committee...... 5 Scientific Committee...... 5

Schedule...... 6

ACE Symposium Scientific Program...... 8 Monday 7th...... 8 Tuesday 8th...... 9 Wednesday 9th ...... 10 Thursday 10th ...... 10 Friday 11th ...... 11 Saturday 12th...... 12 Sunday 13th ...... 12

General Information...... 13

Authors...... 19 1. Solicited Abstracts ...... 19 2. List of Solicited Abstracts...... 32 3. List of Contributed Abstracts...... 33 a. Oral ...... 33 b. Poster...... 34 4. Authors...... 39 Committees

Organizing Committee Scientific Committee

Chairperson Chairperson Rob DeConto Carlota Escutia Dotti University of Massachusetts Amherts. USA. IACT-CSIC, University of Granada. Spain.

Members Members Carlota Escutia Dotti IACT-CSIC, University of Granada. Spain. Jesús Galindo Zaldívar University of Granada. Spain. Peter Barrett Victoria University of Wellington. New Zealand. Francisco José Lobo Sánchez IACT-CSIC, University of Granada. Spain. Michael J. Bentley Durham University. United Kingdom. Óscar Enrique Romero Alesso IACT-CSIC, University of Granada. Spain. Robert Dunbar Stanford University. USA. Jesús Ibáñez Godoy Instituto Andaluz de Geofísica. University of Granada. Fabio Florindo Spain. National Institute of Geophysics and Volcanology. Italy.

Andrés Maldonado López Jane Francis IACT-CSIC, University of Granada. Spain. University of Leeds. United Kingdom.

Jhon Jairo González Alan Haywood IACT-CSIC, University of Granada. Spain. University of Leeds. United Kingdom.

José Abel Flores Villarejo Jerónimo López Martínez University of Salamanca. Spain. Autonomous University of Madrid. Spain.

Fernando Bohoyo Muñoz Colm O’Cofaigh Spanish Geological & Mining Institute (IGME). Spain. Durham University. United Kingdom.

Ross Powell Northern Illinois University. USA.

Martin Siegert University of Edinburgh. United Kingdom.

  Schedule Day Day Room 1.00 p.m. 1.00 p.m. 1.15 p.m. 1.30 p.m. 2.00 p.m. 2.40 p.m. 3.00 p.m. 3.30 p.m. 3.40 p.m. 4.00 p.m. 4.30 p.m. 5.00 p.m. 5.30 p.m. 6.00 p.m. 6.30 p.m. 7.00 p.m. 7.30 p.m. 8.00 p.m. 8.30 p.m. 9.00 08.30 a.m. 08.30 a.m. 09.00 a.m. 09.30 a.m. 10.00 a.m. 10.30 a.m. 11.00 a.m. 11.30 12.00 p.m. 12.00 p.m. 12.30

Opening Theme I: Recent Advances Theme I (cont): Recent Advances in Cenozoic Proxies Theme I (cont): Recent Advances in Cenozoic Theme II: Integrating Geological, Auditorio Ceremony in Cenozoic Proxies and Ice/ Climate Modeling and Ice/ Climate Modeling Proxies and Ice/ Climate Modeling Geophysical and Geochemical Datasets Sala Association of Polar Early Career 7

Gutenberg Break Scientists (APECS) Workshop

Taller Lunch Workshop: CASP: Einstein Break Coffee Building the Rossetta Stone

MONDAY Poster Zone Poster Session Themes I - II Welcome Reception Hospital Real by the University of Granada Theme II (cont.): Integrating Geological, Geophysical and Theme II (cont): Integrating Geological, Geophysical Theme II (cont): Integrating Geological, Theme III: Arctic-Tropics-Antarctic Linkages & Auditorio Geochemical Datasets and Geochemical Datasets Geophysical and Geochemical Datasets / Antarctic Evolution Aula Newton Break

Taller Lunch Workshop: CASP:

Einstein Break Coffee Building the Rossetta Stone TUESDAY 8 Poster Zone Poster Session Themes I - II Coffee Aula Newton Business Meeting: Coulman High Project Break Taller Einstein Workshop: Seismic Data Library System (SDLS) Workshop: Amundsen Sea Embayment: Tectonic and Climatic Evolution Business Meeting: Andrill / EuroANDRILL Steering Committees

Sala Business Meeting: SCAR National Committee Presidencia

WEDNESDAY 9 Workshop: Antarctic Ice-Volume Proxies: Minicine 1

Coffee Break Coffee High and Low Latitude Sequence and Seismic Stratigraphy and Deep-Sea Records Theme III (cont.): Arctic- Tropics-Antarctic linkages & Southern Ocean/ Theme III (cont): Arctic- Tropics-Antarctic linkages & Auditorio Theme IV: Cenozoic- Recent Variability, Implications for Future Predictions & the IPCC Antarctic Evolution Southern Ocean/Antarctic Evolution Business Meeting: ACE Aula Newton Steering Committee Break Workshop: ANTscape: Taller Lunch Reconstruction of Antarctic

Einstein Break Coffee Paleotopography

THURSDAY 10 Poster Session Themes Poster Zone III - IV Carmen de Symposium los Mártires Dinner Theme IV (cont.): Cenozoic- Recent Variability, Implications for Theme IV (cont.): Cenozoic- Recent Variability, Theme IV (cont): Cenozoic- Recent Variability, Auditorio Future Predictions & the IPCC Implications for Future Predictions & the IPCC implications for future predictions & the IPCC Aula Newton Business Meeting: Wilkes Land IODP Expedition 318 Break

Taller Lunch Workshop: ANTscape: Reconstruction of Antarctic Coffee Break Coffee FRIDAY 11 Einstein Paleotopography Poster Zone Poster Session Themes III - IV

Workshop: Developing an Integrated Strategy to Recover Paleoclimate Records Coffee Sala Workshop (cont.): Developing an Integrated Strategy to Recover Paleoclimate Records from the Antarctic Margin and Southern Ocean (cont.) Gutenberg from the Antarctic Margin Break and Southern Ocean Coffee Break Coffee SATURDAY 12 SATURDAY

Workshop: Developing an Integrated Strategy to Recover Paleoclimate Records Coffee Sala Workshop (cont.): Developing an Integrated Strategy to Recover Paleoclimate Records from the Antarctic Margin and Southern Ocean (cont.) Gutenberg from the Antarctic Margin Break and Southern Ocean Coffee Break Coffee SUNDAY 13 SUNDAY

  ACE Symposium Scientific Program 5.00 p.m.-6.00 p.m. Poster Area 11.00 a.m.-11.30 a.m. Poster Zone Break Coffee Break

5.30 p.m-7.00 p.m. Poster Area th Monday 7 Poster Session-Themes I-II 11.30 a.m.-1.15 p.m. Auditorio Theme II (cont.): Integrating Geological, Geophysical and 9.00 a.m.-10.00 a.m. Auditorio 12.50 p.m. Pliomax: Pliocene Maximum Sea Level Project 6.00 p.m.-8.00 p.m. Sala Gutenberg Geochemical Datasets Opening Ceremony Speaker: Maureen Raymo Association of Polar Early Career Scientists (APECS) Workshop 2. Modern and Paleotopographic-Bathymetric Reconstruc- tions for Antarctic Paleoenvironmental Modeling (cont.) 10.00 a.m.-11.00 a.m. Auditorio 1.15 p.m.-2.40 p.m. Parque de las Ciencias 6.00 p.m.-8.00 p.m. Taller Einstein 11.30 a.m. Unveiling the Aurora Subglacial Basin, Theme I: Recent Advances in Cenozoic Proxies and Ice / Lunch/Welcome Cocktail Workshop: CASP: Building the Rossetta Stone : Initial Findings of the First Season of ICECAP Climate Modeling Conveners: Stuart Henrys, Karsten Gohl, Speaker: Donald Blankenship German Leitchenkov, Laura De Santis, Phil Bart, L. Bartek 11.50 a.m. ANTscape: Antarctic Paleotopographic Maps for 1. Cenozoic Climate/Oceans/Ice Volume 2.40 p.m.-3.40 p.m. Auditorio the Last 100 Million Years 10.00 a.m. An Evolving Perspective on the Features and Theme I (cont.): Recent Advances in Cenozoic Proxies and 9.00 p.m. Hospital Real Building Speaker: Peter Barret Forcing of the Hothouse to Icehouse Transition Ice / Climate Modeling Welcome Reception by the University of Granada 12.10 p.m. Antarctic Paleotopography Estimates at Speaker: James Zachos For further information about transportation to the Hospital the Eocene-Oligocene Climate Transition and Their 10.20 a.m. Estimating Eustasy and Ice Volume from 3. Plio-Pleistocene Responses to External Forcing and Internal Real building, please go to the Technical Secretariat. Implications for Ice Sheet Growth Backstripped Low-Latitude Stratigraphy Feedbacks (cont.) Speaker: Douglas Wilson Speaker: Steve Pekar 2.40 p.m. Orbital Influences on the Pliocene Antarctic Ice 12.30 p.m. Tectonic Architecture of the Amundsen Sea 10.40 a.m. The Deconvolution of Ice Volume and Marine Sheets Embayment, West Antarctica: Basic Constraints for Ice- Benthic Records and the Need of Transient Climate Speaker: Tim Naish Sheet Dynamics th Simulations on Geological Time Scales 3.00 p.m. Did Antarctic Cooling ~ 3.3 Million Years Ago Drive Tuesday 8 Speaker: Karsten Gohl Speaker: Roderik Van de Wal Northern Hemisphere Glaciations? Speaker: Robert McKay 9.00 a.m.-11.00 a.m. Auditorio 3. Landscape Evolution Theme II (cont.): Integrating Geological, Geophysical and 12.50 p.m. Predicting the Subglacial Landscape Evolution 11.00 a.m.-11.30 a.m. Poster Zone 4. Bipolar Linkages Geochemical Datasets of Antarctica Coffee Break 3.20 p.m. Arctic Stratigraphic Candidates and Events for Speaker: Stewart Jamieson Comparison with the Antarctic Past 1. Integrating Terrestrial and Marine Datasets (cont.) Speaker: Julie Brigham-Grette 9.00 a.m. Seven Million Year History of the Antarctic Peninsula 11.30 a.m.-1.15 p.m. Auditorio Ice Sheet Revealed by Coupled Geological and Climate 1.15 p.m.-2.40 p.m. Vía Láctea Restaurant (Parque de Theme I (cont.): Recent Advances in Cenozoic Proxies and Modelling Studies las Ciencias) Ice / Climate Modeling 3.40 p.m.-5.00 p.m. Auditorio Speaker: John Smellie Lunch Theme II: Integrating Geological, Geophysical and 9.20 a.m. An Overview of Antarctic Geophysical Records 2. Recent Advances in Modeling the Present and Past Antarctic Geochemical Datasets Speaker: Phil Bart Climate/Cryosphere/Ocean System 9.40 a.m. Proposed Shallow Drilling Program (Shaldril) in Eastern 2.40 p.m.-3.40 p.m. Auditorio 11.30 a.m. Climate Variability and Change in Antarctica during 1. Integrating Terrestrial and Marine Datasets Ross Sea: Evidence for Oligocene Theme II (cont.): Integrating Geological, Geophysical and the Past Century 3.40 p.m. TBA Speaker: Bruce Luyendyk Geochemical Datasets Speaker: Andrew Monaghan Speaker: David Harwood 11.50 a.m. Some Aspects of Antarctic Ice Sheet Evolution 4.00 p.m. The Glacial and Climate Record of the Dry Valleys, 2. Modern and Paleotopographic-Bathymetric Reconstructions 4. Subglacial Lakes from the Eocene to the Future Southern Victoria Land for Antarctic Paleoenvironmental Modeling 2.40 p.m. Direct Measurement & Sampling of Subglacial Speaker: David Pollard Speaker: David Marchant 10.00 a.m. Neogene Geodynamic Evolution of the West Lake Ellsworth: Multidisciplinary Investigation of Life in 4.20 p.m. Resolving the Off-Shore and On-Shore Pliocene Antarctic Rift from Drill Core and Volcanic Alignment Studies Extreme Environments & West Antarctic Ice Sheet History 3. Plio-Pleistocene Responses to External Forcing and Internal Climate Record for the Ross Sea Embayment, Antarctica: Speaker: Terry J. Wilson Speaker: Martin Siegert Feedbacks Implications for the Stability of the Antarctic Ice Sheets 10.20 a.m. Formation of the Transantarctic Mountains and 3.00 p.m. Formation and Preservation of Long-Term 12.10 p.m. Antarctic Orbital Variations - All the Usual Speaker: Douglas Kowalewski West Antarctic Rift System from Collapse of the West Antarctic Paleoclimatic and Paleoenvironmental Records in Antarctic Suspects 4.40 p.m. Early Miocene Terrestrial Evidence for Cyclical Plateau: Thermochronologic and Geologic Constraints Subglacial Lakes Speaker: Peter Huybers Glaciation and the Cutting of Deep Glacial Troughs from Speaker: Paul Fitzgerald Speaker: Slawek Tulaczyk 12.30 p.m. Climate Forcing of Antarctic Ice Sheet Variability on Upper Taylor Valley and the Friis Hills in the McMurdo Dry 10.40 a.m. Peering Beneath the Ice Sheet: AGAP Evidence for a 3.20 p.m. Modelling Subglacial Lakes and Their Influence Glacial-Interglacial Timescales Valleys More Dynamic East Antarctica on Antarctic Ice Sheet Dynamics Speaker: Rob DeConto Speaker: Adam Lewis Speaker: Robin Bell Speaker: Frank Pattyn

  3.40 p.m.-5.00 p.m. Auditorio 3.00 p.m.-6.00 p.m. Minicine 1 10.40 a.m. The Onset of Antarctic Glaciation and the Eocene- 3.40 p.m. Neogene Sea Surface Temperature Theme III: Arctic-Tropics-Antarctic Linkages & Southern Workshop: Antarctic Ice-Volume Proxies: High and Low Oligocene Transition, Cooling, Sea Level or Both? Reconstructions from the McMurdo Sound and McMurdo Ocean/Antarctic Evolution Latitude Sequence and Seismic Stratigraphy and Deep- Speaker: Henk Brinkhuis Ice Shelf Sea Records Speaker: Francesca Sangiorgi 1. Southern Ocean Gateways, Circulation, Biogeochemistry Conveners: Stephen Pekar, Sandra Passchier, Carrie Lear, 4.00 p.m. A Mid Miocene Thermal Maximum? Evidence and Ocean-Ice Sheet-Sea Ice Interactions Francesca Sangiorgi 11.00 a.m.-11.30 a.m. Poster Zone from Palynomorphs Recovered from ANDRILL-Southerm 3.40 p.m. Early Opening of the Drake Passage, Antarctica: Coffee Break McMurdo Sound, Antarctica New Evidence from Deep Basins in the Southwestern Scotia Speaker: Sophie Warny Sea 3.30 p.m.-6.00 p.m. Sala Presidencia 4.20 p.m. Circum-Antarctic Warming Events between 3.4 Speaker: Andrés Maldonado Business Meeting: SCAR National Committee 11.30 a.m.-1.15 p.m. Auditorio And 4 Ma Recorded in Sediments from Prydz Bay (ODP 4.00 p.m. Sediment Provenance and Thermochronology of Theme III (cont.): Arctic-Tropics-Antarctic Linkages & Leg 188) and the Antarctic Peninsula (ODP Leg 178) the Margins of Drake Passage Southern Ocean/Antarctic Evolution Speaker: Carlota Escutia Dotti Speaker: David L. Barbeau, Jr. 5.00 p.m.-5.30 p.m. Poster Zone 4.20 p.m. Connecting the Tropics and the Poles with Heat Coffee Break 3. Cenozoic Cooling, Glacial Onset, and Global Carbon Cycle Transport and Teleconnections Dynamics (cont.) 5.00 p.m.-6.00 p.m. Poster Zone Speaker: Matthew Huber 11.30 a.m. New Records of the Eocene/Oligocene Transition Break 4.40 p.m. Ocean Heat along the West Antarctic Margin: 6.00 p.m.-9.30 p.m. Taller Einstein from the IODP Pacific Equatorial Age Transect (PEAT): A Test Source, Delivery and History Business Meeting: Andrill / EuroANDRILL Steering of the Competing Stratigraphic Interpretations of Antarctic Speaker: Douglas G. Martinson Committees Glaciation and Ocean De-Acidification 5.30 p.m.-7.00 p.m. Poster Zone Speaker: Paul A. Wilson Poster Session – Themes III-IV 11.50 a.m. Paleoclimate Variability Inferred from a Middle 5.00 p.m.-6.00 p.m. Poster Area Eocene – Early Oligocene Sequence from the Kerguelan th Break Thursday 10 Plateau 6.00 p.m.-7.30 p.m. Aula Newton Speaker: Giuliana Villa Business Meeting: ACE Steering Committee 9.00 a.m.-11.00 a.m. Auditorio 12.10 p.m. Orbitally Paced Sedimentary Record across the 5.30 p.m.-7.00 p.m. Poster Area Theme III (cont.): Arctic-Tropics-Antarctic Linkages & Eocene/Oligocene Boundary Glaciation in the Western Poster Session-Themes I-II Southern Ocean/Antarctic Evolution Antarctic Margin 6.00 p.m.-8.00 p.m. Taller Einstein Speaker: Simone Galeotti Workshop: ANTscape: Reconstruction of Antarctic 1. Southern Ocean Gateways, Circulation, Biogeochemistry 12.30 p.m. The Role of Carbon Dioxide during the Onset of Paleotopography 6.00 p.m.-8.00 p.m. Taller Einstein and Ocean-Ice Sheet-Sea Ice Interactions (cont.) Antarctic Glaciation Conveners: Peter Barrett, Karsten Gohl, Alan Haywood, Workshop: CASP: Building the Rossetta Stone 9.00 a.m. Pliocene-Recent Orbital and Sub-Orbital Variability Speaker: Mark Pagani Christine Siddoway Conveners: Stuart Henrys, Karsten Gohl, within the Polar Antarctic Zone of the Southern Ocean: The German Leitchenkov, Laura De Santis, Phil Bart, L. Bartek Biogeochemistry of -Bearing Sediments Speaker: Robert Dunbar 1.15 p.m.-2.40 p.m. Vía Láctea Restaurant (Parque de las 9.00 p.m. Carmen de los Mártires 9.20 a.m. Holocene Productivity Changes Off Adelie Land, Ciencias) Symposium Dinner East Antarctica Lunch Speaker: Xavier Crosta th Wednesday 9 9.40 a.m. Holocene History of Water Convection and Ice Rafting and Implications for Ice Masses and Bottom Water 2.40 p.m.-5.00 p.m. Auditorio th 8.30 a.m.-1.00 p.m. Taller Einstein Production Theme IV: Cenozoic-Recent Variability, Implications for Friday 11 Workshop: Seismic Data Library System (SDLS) Speaker: Andreas Borchers Future Predictions & the IPCC Convener: Alan Cooper 9.00 a.m.-11.00 a.m. Auditorio 2. Terrestrial Records and Role/Response in Change 2.40 p.m. Diachronous in the Antarctic Theme IV (cont.): Cenozoic-Recent Variability, 8.30 a.m.-5.00 p.m. Aula Newton 10.00 a.m. Cenozoic Climate Change in Antarctica from Peninsula Region: Results from Shaldril and Other Long Implications for Future Predictions & the IPCC Business Meeting: Coulman High Project Fossil Plants Coring Efforts Speaker: Jane Francis Speaker: John Anderson 9.00 a.m. Can Blue-Ice Moraines Provide a 400-Kyr Insight 11.00 a.m.-11.30 a.m. Poster Zone 3.00 p.m. Neogene Tectonic and Climatic Evolution of the into West Antarctic Ice-Sheet History? Coffee Break 3. Cenozoic Cooling, Glacial Onset, and Global Carbon Cycle Western Ross Sea-Chronology of Events from the And-1B Drill Speaker: David Sugden Dynamics Holes 9.20 a.m. A Geological Constraint on Relative Sea Level in 1.00 p.m.-6.00 p.m. Taller Einstein 10.20 a.m. Late Cretaceous to Palaeogene Climate Evolution, Speaker: Gary Wilson Marine Isotope Stage 3 in the Larsemann Hills, Lambert Workshop: Amundsen Sea Embayment: Tectonic and Antarctic Peninsula: Seymour Island/Marambio Drilling 3.20 p.m. Miocene through Pleistocene Glacial Facies Distri- Glacier Region, East Antarctica (31 366 - 33 228 CAL YR Climatic Evolution Project (SIMDP) bution Inand-2A, Antarctica and Paleoclimatic Implications BP) Conveners: Robert Larter, Karsten Gohl Speaker: Alan P.M. Vaughan Speaker: Sandra Passchier Speaker: Dominic Hodgson

10 11 9.40 a.m. Last Major Retreat of Antarctic Ice Sheet Forced 4.30 p.m.-5.30 p.m. Poster Zone by Sea Level Rise and Ocean Warming Break General Information Speaker: Andrew Mackintosh 10.00 a.m. Things We Don’t Know About the West 4.30 p.m.-6.00 p.m. Poster Area Antarctic Ice Sheet at the Last Glacial Maximum Poster Session – Themes III-IV Symposium Dates and Venue IMPORTANT: No registration will be confirmed until Spaker: Robert Larter September 7-11th, 2009. payment is received. 10.20 a.m. What Do We Know About the West Antarctic Parque de las Ciencias (Science Museum) Ice Sheet at the Last Glacial Maximum, and its Deglacial 5.00 p.m.-8.00 p.m. Aula Newton Granada, Spain. Registration Fees From July 25th to on-site History? Business Meeting: Wilkes Land IODP Expedition 318 www.parqueciencias.com Speaker: Michael Bentley STUDENT 195,00 € 10.40 a.m. Marine Sedimentary Record and Timing of Ice- PARTICIPANT 325,00 € Sheet Advance and Retreat in the Southern Bellingshausen 5.00 p.m.-8.00 p.m. Taller Einstein Technical Secretariat VAT included Sea, West Antarctica, during the Last Glacial Period Workshop: ANTscape: Reconstruction of Antarctic Fase20 Congresos Speaker: Claus-Dieter Hillenbrand Paleotopography Camino de Ronda, 42. 18004. Granada. Registration fee includes: Conveners: Peter Barrett, Karsten Gohl, Alan Haywood, Tel. 0034 958 20 35 11; Fax. 0034 958 20 35 50 • Access to all the scientific sessions Christine Siddoway [email protected] ; www.fase20.com • Access to all the Science Museum facilities 11.00 a.m.-11.30 a.m. Poster Zone • Documentation Coffee Break Technical Secretariat Opening Time • Welcome reception by the University of Granada The Technical Secretariat will be open for the assistance • Lunch of participants: • Coffee breaks 11.30 a.m.-1.15 p.m. Auditorio Monday 7th: 8.00 a.m.-1.15 p.m. / 2.30 p.m.-7.30 p.m. • Symposium Dinner th Theme IV (cont.): Cenozoic-Recent Variability, Saturday 12 Tuesday 8th: 8.00 a.m.-1.15 p.m. / 2.30 p.m.-7.30 p.m. Implications for Future Predictions & the IPCC Wednesday 9th: 8.00 a.m.-6.00 p.m. 8.30 a.m.-5.30 p.m. Sala Gutenberg Thursday 10th: 8.00 a.m.-1.15 p.m. / 2.30 p.m.-7.30 p.m. Cancellation policy 11.30 a.m. A Geochemical Record of Holocene Variations Workshop: Developing an Integrated Strategy to Friday 11th: 8.00 a.m.-1.15 p.m. / 2.30 p.m.-7.30 p.m. in the Southern Hemisphere Westerly Wind Field Recover Paleoclimate Records from the Antarctic All cancellations must be made in writing to the Technical Speaker: Christopher Moy Margin and Southern Ocean Secretariat. 11.50 a.m. The Last Deglaciation from a New Coastal East Conveners: Tim Naish, Laura De Santis, Richard Levy, Local Time Antarctic Ice Core: Taldice Frank Rack C.E.S.T (Central European Summer Time) in Spain is 1 hour *Cancellations that take place after August 7th, 2009 will Speaker: Barbara Stenni ahead G.M.T. (Greenwich Mean Time). incur a 25% cancellation fee. 12.10 p.m. Palaeo-Accumulation Rates in East Antarctica 11.00 a.m.-11.30 a.m. / 4.30 p.m.-5.00 p.m. Poster Zone *Cancellations that take place after August 8th, 2009 will Deduced from the SPRI Lines Coffee Break incur a 100% cancellation fee. Speaker: Richard Hindmarsch Presentations Pick-Up 12.30 p.m. Improved Characterization of Subglacial Presentations of abstracts that will take place at the Auditorio All refunds will be issued after the Symposium is over, Hydrology Using Multiple Radar Focusing Windows: must be submitted to the Presentation Pick-Up Room from 21st September 2009 onwards. Examples from Totan and Thwaits Glaciers (Second Floor, next to Sala Presidencia) at least 4 hours Speaker: Dustin Schroeder before the presentation, but we advise you to do it as soon th Sunday 13 you arrive to the Symposium venue, even 1 or 2 days before. Registration to Workshops

1.15 p.m.-2.40 p.m. Vía Láctea Restaurant (Parque de las 8.30 a.m.-5.30 p.m. Sala Gutenberg The registration to workshops has been possible online Ciencias) Workshop: Developing an Integrated Strategy to Visiting the Parque de las Ciencias at the Symposium website. To check your registration in Lunch Recover Paleoclimate Records from the Antarctic All participants will be able to access the facilities of the a Workshop, please look at the list that will be posted at Margin and Southern Ocean Parque de las Ciencias just showing their Symposium the door of the workshop room before the beginning of Conveners: Tim Naish, Laura De Santis, Richard Levy, accreditation card. the activity. 2.40 p.m.-4.30 p.m. Auditorio Frank Rack Theme IV (cont.): Cenozoic-Recent Variability, Implications for Future Predictions & the IPCC 11.00 a.m.-11.30 a.m. / 4.30 p.m.-5.00 p.m. Poster Zone Coffee Break Role of ACE in Future Predictions and the IPCC (AR5) Registration Accomodation 2.40 p.m. ACE Contribution to the Intergovernmental Panel on Climate Change Fifth Assessment Report New registrations are possible at the Symposium venue, Hotel reservations have been made with an economic Speaker: Peter Barrett until the maximum capacity expected by the Organization risk and are subject to cancellation policies imposed by 3.00 p.m. Discussion: ACE and IPCC. Future of ACE. is reached. the establishments themselves.

12 13

Due to this fact, we can only confirm a reservation if you Methods of payment for registrations and have made the payment, and you have also notified it to hotel reservations Situation Maps the Technical Secretariat. For registrations and hotel reservations at the Symposium Hotel Cat. Single Room Double Room venue, the methods of payment are: Access to Venue

Saray 4* 67,00 € 81,00 € • By credit card. Please, indicate the following San Antón 4* 80,00 € 90,00 € information: Andalucía Center 4* 65,00 € 78,00 € - Type of credit card (VISA, MASTER CARD, AMERICAN EXPRESS) Maciá Gran Vía 3* 63,00 € 80,00 € - Holder Prices per room and night. Breakfast and VAT included. - Whole number Conferences and - Expiration date Exhibitions Center

Terms and Conditions • In cash.

• Reservations will only be considered confirmed if the payment has been made and the Technical Secretariat Accreditation Cards has been notified. • You can ONLY be sure that your reservation has been Red: Committee processed if you have received your confirmation Blue: Speaker / Convener number at the end of the process. Please, write this Green: Participant number down because you will need it for any further Purple: Student revision or modification. Grey: Press White: Technical Secretariat

Hotel Reservation Cancellation Policy

Cancellation fees: • Cancellations that take place after July 1st, 2009 will incur a 25% cancellation fee. • Cancellations that take place after August 1st, 2009 will incur a 50% cancellation fee. • Cancellations that take place after August 20th, 2009 will incur a 100% cancellation fee.

All cancellations must be made in writing to the Technical Secretariat: • Fax: 0034 958 20 35 50 • E-mail: [email protected]

14 15 Parque de las Ciencias (Groundfloor) Social Events

Symposium Dinner Welcome Reception at the Hospital Real Thursday 10th, 9.00 p.m. Building Place: Carmen de los Mártires Monday 7th, 9.00 p.m. Paseo de los Mártires, s/n. Granada. Place: Hospital Real Building IMPORTANT: The card given is not an invitation. To For further information about transportation to the attend, please exchange it for your invitation at the event, please go to the Technical Secretariat. Technical Secretariat before September 9th, 5.00 In your documentation you will find the invitation p.m. Otherwise, we will not be able to ensure your to this event. Thanking you in advance for your place at the Dinner. collaboration, we inform you that hanging out this ACCESS ticket will be indispensable for accessing the event. TO LUNCH MINICINE Transportation to the Symposium Dinner 1 Lunch There will be at the participants’ disposal buses Tuesday 8th, Thursday 10th & Friday 11th, 1.15 p.m. from the Parque de las Ciencias, at 8.15 p.m., and Place: Vía Láctea Restaurant (Parque de las Ciencias) from the Conferences and Exhibitions Center, at In your documentation you will find the lunch tickets. 8.30 p.m., to the Carmen de los Mártires. At the Thanking you in advance for your collaboration, end of the Dinner, buses will take the participants we inform you that hanging out this ticket will be SALA back to the Conferences and Exhibitions Center of indispensable for accessing the lunch area. TALLER GUTENBERG Granada. We kindly request participants to be punctual. NEWTON ENTRY This Carmen (Granada’s traditional house with Technical enclosed garden) is a 19th century house with its Tours Secretariat ornamental and stunning grounds. It is located just to the right of the Alhambra palace. There are some Full day visit to La Alpujarra interesting views of the Alhambra from the other Wednesday 9th, 8.30 a.m. side and great views of the city of Granada and the Sierra Nevada. The gardens contain a number Meeting at the official point: 8.30 a.m. Conferences and ACCESS of statues, grottoes, and an ornamental duck pond Exhibition Center of Granada*. TO TALLER with its bridge and tower-like ruins. EINSTEIN Price per person: 60€ (1ª FLOOR) AUDITORIO During the Moorish occupation of the city, some Prices are valid for a minimum group size of 40 Christian captives who worked on building the people. Alhambra palaces were imprisoned in dungeons here and many of them died. Afterwards when IMPORTANT: You can only buy your ticket to the POSTER Christians had conquered Granada in the 16th Alpujarra Visit on Monday, until 5.00 p.m. ZONE century, Queen Isabel first built a shrine here to the martyrs who had died and then it became a This excursion will be interesting for those who like convent. Later, in the 19th century, it was converted beautiful landscapes with water and peaceful places. into a residential palace. The Alpujarra is a mountainous district between the Sierra Nevada range and the Mediterranean Sea. This region is one of great natural beauty. Because of a Welcome Cocktail warm southerly climate combined with a reliable Monday 7th, 1.15 p.m. supply of water for irrigation coming from the rivers Place: Parque de las Ciencias running off the Sierra Nevada, its valleys are among the most fertile in Spain.

16 17 We will visit Lanjarón, with its famous medicinal Visit to the Alhambra water springs, Órgiva, which is the main village of this Wednesday 9th Authors region, and other typical villages as Pitres, Pórtugos and Trevélez, the highest town in Spain. In Trevélez Price per person: 14,50 € (handling fee included) 1. Solicited Abstracts 5. Department of Earth Sciences, University of California, Santa Barbara, we will visit a place famous for ham drying in which CA 93106-9630, USA air-cured hams are stored. We will also walk around IMPORTANT: You can get your entry ticket at the Technical REF. 3444 (e-mail: [email protected]) Diachronous Climate Change in the Antarctic Peninsula Region: Results Pampaneira , Capileira and/or Bubión. We will have Secretariat. Limited places. from Shaldril and Other Long Coring Efforts ABSTRACT: lunch at one of these typical villages, and we will be Authors: J B. Anderson 1, K.T. Milliken 1, D. C. Heroy 1, B.R. Michalchuk 1, ANTscape is an ACE project to develop over the next three years a series able to try the traditional Alpujarran dish consisting of The Alhambra was a palace, a fortress and a citadel; the J.S. Wellner 2, C. S. Allen 3, P. L. Manley 4, W. Majewski 5 , S.Bohaty 6 of maps to show the changes in Antarctic paleotopography over the last 1. Department of Earth Sciences, Rice University, Houston, TX 77005; ph. ~100 million years. The reconstructions will provide a base for summarising pork loin, chorizo sausage, black pudding, fried eggs residence of the Nasrid Sultans and top government 713-348-4884; fax 713-348-5214 a range of paleoenvironmental data, and be useful both as inputs for the and Andalusian style potatoes. officials, court servants and the royal guard. 2. Earth and Atmospheric Sciences, 312 Science Rsrch. Bldg 1, The next generation of ice sheet-ice shelf models, and for credible and realistic University of Houston, Houston, TX, 77204-5007, ph. 713-743-0214 visualization of past landscapes to promote wider appreciation of past 3. British Antarctic Survey, High Cross, Madingley Road, Cambridge, changes in the Antarctic environment. Price includes: The Alhambra, literally “the red one”, it is a palace and England CB3 0ET, ph. 44-(0) 1223-221422 The first meeting of the group in April 2009 in Leeds agreed thatfor 4. Department of , Middlebury College, McCardell Bicentennial younger periods (Cenozoic) the present-day bedrock topography from the • VAT fortress complex of the Moorish rulers of Granada in Hall 427, Middlebury, VT, 05753 SCAR BEDMAP project would be a useful starting point for reconstructing • Local guide during the visit southern Spain (known as Al-Andalus when the fortress 5. Institute of Paleobiology Polish Academy of Sciences, Twarda 51/55, past paleotopography, moving to BEDMAP 2 when it became available. • Lunch was constructed during the mid 14th century), occupying Warszawa, Poland However for older periods researchers would have to draw more on current 6. University of Southampton National Oceanography Centre, European knowledge of plate movements, tectonic deformation, thermal evolution • Coach round-trip a hilly terrace on the southeastern border of the city of Way, Southampton, S014 3ZH, UK and personal geological experience. Because of the scarcity of geological Granada. (e-mail: [email protected]; [email protected]; [email protected]; manley@ data, it was recognised that the reconstructions would entail considerable middlebury.edu; [email protected]; [email protected]) geological interpretation. However it was acknowledged that even poorly Price does not include: constrained reconstructions would be a significant improvement on the • Any service not specified Once the residence of the Muslim rulers of Granada and ABSTRACT: current practice of using present day topography for models of past ice Detailed analysis of long sediment cores from four locations in the sheets, when we know past topography was different. their court, the Alhambra is now one of Spain’s major Antarctic Peninsula (AP), in conjunction with the paleoenvironmental The following six time slices, each representing a significant climatic (*) Conferences and Exhibitions Center of Granada tourist attractions exhibiting the country’s most famous record from Palmer Deep and land-based studies (published results), regime or shift, were proposed for a map: 4, 14, 34, 50, 70 and 92 Ma, with Paseo del Violón s/n, 18006. Granada. Spain. www.pcgr.org Islamic architecture, together with Christian 16th century provide detailed records of Holocene climate change in the region work beginning first on a map for 34 Ma. This is a time that is far enough and the spatial sampling needed to examine the timing of events, and back for there to be a significantly different topography, but not so far and later interventions in buildings and gardens that therefore climate forcing mechanisms. These records include a 108 meter back that reconstruction is seriously unconstrained. It is also of great marked its image as it can be seen today. Within the drill core from Maxwell Bay in the South Shetland Islands, a 77 meter drill interest to paleoclimatologists as the largely ice-free landscape on which core from the Firth of Tay on the eastern side of the Bransfield Strait, and the first continental ice-sheet formed. The group leader for this time slice Alhambra, the Palace of Charles V was erected by Charles long piston cores from the Bransfield Strait and Neny Fjord in Marguerite is Doug Wilson. V, Holy Roman Emperor in 1527. Bay. Robust radiocarbon chronologies were obtained for all four sites and The group decided the maps could most conveniently be developed a number of paleoclimate proxies were used to identify and characterize by considering the Antarctic as comprising three large regions: 1) West climate events. These include grain size, sedimentation rates, magnetic Antarctica: , Antarctic Peninsula, Ellsworth Mountains, Throughout its history, the Alhambra has experienced susceptibility, pebble content, TOC, biogenic silica content and diatom West Antarctic rift system, and Ross Sea, 2) East Antarctica many transformations, Granada keeping testimonies of and foraminiferal assemblages,. Five main climate intervals are recorded including Transantarctic Mountains, and 3) the Antarctic margin, throughout the peninsula: an early Holocene deglacial interval, the Mid- comprising the continental shelf and slope as far as the continent- each period. Holocene Climate Optimum, a minor cooling event in the mid-Holocene ocean transition. A number of procedural issues are under discussion followed by a minor warming event, and the Neoglacial. The timing of these by ANTscape members, and input is sought from ACE 2009 participants events varies widely (up to a few thousand years) across the AP region and in order that the issues be resolved in 2009. These include the primary In 1984 the Alhambra and the Generalife were declared reflects differences in factors such as orographic effects, drainage basin geospatial tools to be used, spatial resolution of the primary product, the World Heritage sites by UNESCO. size and altitude, wind patterns, oceanography, and sea ice coverage. organizational scheme for gridding the data, and data/document storage Additional paleoclimate archives, especially on the Weddell Sea side of and access. For the moment a report on the Leeds workshop along with the AP, are required to better resolve the spatial and temporal variations abstracts and many of the presentations given there can be found at NOTE: Price does not include transportation or guide. in glaciation and climate, as well as the exact driver(s) of Holocene http://groups.google.com/group/antscape?hl=en climate. However, our results do suggest that the rapid regional warming The maps prepared by ANTscape will depend not only restoration of and glacial retreat observed during the last century is unprecedented Antarctic continental geography by reversing tectonic movements and in breadth and synchroneity. Ongoing research focuses on kasten cores elevation changes, but also the restoration of sediment eroded from the from eight different fjords throughout the AP were sedimentation rates continent and deposited around and beyond the Antarctic margin. This are especially high. This research is aimed at examining the magnitude will require close collaboration with ROSSmap and the Circum-Antarctic and temporal variability of the Little Ice Age and current warming episode Stratigraphy and Paleobaythmetry Project (CASP). using short-lived isotopes as a chronological tool. Key Words: Antarctica Paleotopography Maps Cenozoic Cretaceous Key Words: Antarctic Peninsula, Holocene, Sediment Cores, Paleoclimate, Shaldril

REF. 3600 REF. 3598 ACE Contribution to the Intergovernmental Panel on Climate Change ANTscape: Antarctic Paleotopographic Maps for the Last 100 Million Fifth Assessment Report Years Author: Barrett, P.J. Authors: Barrett, P.J.1, Francis, J.E.2, Hayward, A.M.2, Gohl, K.3, Siddoway, Antarctic Research Centre, Victoria University of Wellington, P.O. Box 600, C.S.4, Wilson D.S.5 Wellington, NZ (e-mail: [email protected]) 1. Antarctic Research Centre, Victoria University of Wellington, P.O. Box 600, Wellington, NZ ABSTRACT: 2. School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK The IPCC is primarily an organisation of governments to help them 3. Alfred Wegener Institute for Polar and Marine Research, Postfach address the global problem of climate change collectively and separately. 120161, D-27515 Bremerhaven, Germany They have done this by developing a process for assessing the state of 4. Department of Geology, College, Colorado Springs, CO 80903, knowledge by experts, who report every 5-6 years on three aspects of USA the problem: i) the physical basis of climate science, ii) the effects and

18 19 consequences of changes already observed and iii) the best options seafloor). Chaotic seismic facies and/or truncated foreset reflections 1. Lamont-Doherty Earth Observatory of Columbia University, Palisades, to the peak of Pliocene warming (~3.2 Ma). The earliest glaciations of parts for mitigating the effects (essentially ways of reducing directly below these unconformities are interpreted as proglacial strata New York, USA, +1 845 365 8827 of the arctic may have been very different in style and extent from those emissions) and for humanity adapting to the future consequences. that were truncated as the ice sheet advanced across the continental shelf. 2. British Antarctic Survey, Cambrigde, United Kingdom of the last half million years. Antarctica as a region did not figure prominently in the first three Thus, seismic reflections interpreted as glacial unconformities presumably 3. Federal Institute for Geosciences and Natural Resources, Hannover, During interglacial periods seas repeatedly flooded the Bering Strait, assessments in 1990, 1995 and 2001, because modelling indicated that correspond to sharp contacts between glacial-phase grounding-zone- Germany changing the configuration of coastlines, altering regional continentality, and warming could be expected to lead to an increase in snow accumulation proximal sediments (i.e., till) overlain by interglacial pelagic sediments 4. United States Geological Survey, Denver, USA reinvigorating the exchange of water masses between the North Pacific, Arctic to balance marginal melting for the next few decades. Nor did these early (i.e., diatomaceous ooze) accumulated after ice-sheet decoupling and 5. Center for Remote Sensing of Ice Sheets, The University of Kansas, Ocean and North Atlantic. Since first submergence about 5-5.5 million yrs ago reports pay much attention to past climates as a guide to the future. rapid retreat. Lawrence, Kansas, USA (Marincovich and Gladenkov, 2001) this marine gateway experienced the However, the most recent (2007) assessment of climate science differed in Geophysical-based investigations of glacial history have focused on two 6. Complex Systems Research Center, University of New Hampshire, penetration of warmer water masses from as far south as northern Japan to as two respects: i) for the first time there was a chapter on paleoclimate, and temporal scales of reconstruction: 1) Ice-sheet retreat and dynamics at Durham,NH, USA far north as the Beaufort Sea (Brigham-Grette and Carter, 1992). Glacioeustatic ii) the science report concluded that both Greenland and Antarctica were and post-dating the last glacial maximum (LGM) and 2) Major ice-sheet 7. Sander Geophysics Ltd., Ottawa, Canada sea level in the Arctic was high (up to 20-40 masl) at least three times in the most likely losing ice, but that knowledge was insufficient to project the dynamics throughout the Cenozoic. (E-mail: [email protected] ) Pliocene and documented in a variety of widely spaced stratigraphic sequences. likely effect on global sea level in the future. The geophysical evidence of ice-sheet expansion to the outer continental These sequences also contain information that places limits on seaonal of sea Throughout the last two decades of IPCC deliberations a curiosity- shelf is compelling, especially for LGM. Large-scale troughs show that ice- ABSTRACT: ice. During the last interglacial (MIS 5e) the winter sea ice limit was as much as driven Antarctic paleoclimate community has developed, first through streams advanced to the shelf edge. The LGM advance is also marked by Exploring the history of the East Antarctic Ice Sheet and lithospheric 800 km further north than now, and summer sea ice in the Arctic Ocean may ANTOSTRAT and then ACE, which can contribute to both of these issues. grounding-zone wedges that are several 10s of meters thick. The existence structure of the Gamburtsev Subglacial Mountains were primary goals of have been periodically absent (CAPE members, 2006). Treeline across much of It can now offer a well-founded perspective from the reconstruction of of streaming ice is confirmed by mega-scale lineations and other stream- the International Polar Year. Scientists from seven nations have launched a Alaska and nearby Chukotka was hundreds of kilometers further north. past climate in the Antarctic region (and its global context), summarised lined features primarily found in bathymetric troughs. Retreat from flagship program (AGAP) to explore the Gamburtsev Subglacial Mountains Apparently conflicting evidence from oceanographic and terrestrial sources in the “Antarctic Climate Evolution volume of Florindo and Siegert. It is LGM maximum occurred via two to four steps. Each pause in retreat is buried by the East Antarctic ice sheet and bounded by numerous requires an evaluation of non-analog or new analog GCM reconstructions. also providing physical evidence of the behaviour of ice sheets in the marked by a discrete grounding zone wedge. These features provide an subglacial lakes. The AGAP umbrella is a multi-national, multi-disciplinary Synchronizing glacial/interglacial and millennial scale events in both distant past, when global temperature and atmospheric CO2 levels were excellent opportunity for detailed evaluations of the onset, duration and effort and includes aerogeophysics, passive seismology, traverse programs hemispheres will require the integration land-sea arctic records before higher than today. It is crucial that these advances, along with those of termination of recent grounding events. These LGM data also provide a and will be complimented by future ice core and bedrock drilling. A major there is a massive stretch to Antarctica. The newly drilled Lake El’gygytgyn our glaciological colleagues, are adequately represented in the next IPCC basis for interpreting stratal patterns associated with pre-LGM glacial new airborne data set including gravity; magnetics; ice thickness; SAR sediment record dating to 3.6 Ma from Chukotka in NE Arctic Russia provides assessment report to appear in 2013. There is an opportunity to do this reconstructions. images of the ice-bed interface; near-surface and deep internal layers; new impetus for arctic land-sea and Antarctic comparisons. over the next few months by commenting on the draft Scoping Report To evaluate glacial history over longer intervals of geologic time, and ice surface elevation is providing insights into a more dynamic East now under consideration through national IPCC representatives and investigators have generally designed lower-resolution seismic-acquisition Antarctica. More than 120,000 km of aerogeophysical data have been Key Words: Cenozoic Stratigraphy, Western Arctic, Temperature, Sea Level, through SCAR, which is currently seeking status as a non-governmental schemes that image deeper subsurface levels. The ANTOSTRAT project acquired from two remote field camps during the 2008/09 field season. Sea Ice History observer, and by offering to contribute as an author or reviewer. (1995) and other similar studies focused on establishing a regional-scale AGAP effort was designed to address four fundamental questions: 1) What The ACE community will have much to offer with results from the ANDRILL seismic-stratigraphic framework for the entire Ross Sea via correlations to role does topography play in the nucleation of continental ice sheets? 2) McMurdo Portfolio and the IODP Wilkes cruise published or in press in DSDP and near-shore drill sites. ANTOSTRAT defined six major Ross Sea How are major elevated continental massifs formed within intraplate REF. 3372 time for IPCC consideration. The ANTscape initiative will also contribute Unconformities (RSU1 to RSU6) within the stratigraphic section overlying settings but without a straightforward plate tectonic mechanism? 3) How The Onset of Antarctic Glaciation and the Eocene-Oligocene Transition, by providing a realistic landscape on which to model former ice sheets, acoustic basement. These major subdivisions have been related to events do tectonic processes control the formation, distribution, and stability of Cooling, Sea Level or Both? thus ensuring that the geological knowledge gained from earlier times noted on eustatic and composite oxygen-isotope records. Rather than subglacial lakes? 4) Where is the oldest climate record in the Antarctic ice Author: Henk Brinkhuis can be fairly compared with present and future climate. These efforts indicating only six major ice-sheet expansions, the stratigraphic intervals sheet? Preliminary results point towards a more dynamic East Antarctic ice Institute of Environmental Biology, Marine Palaeobiology, Laboratory of will benefit from new developments in ice sheet modelling, including delimited by these RSUs show that multiple cycles of advance and retreat sheet and a more complex tectonic evolution for East Antarctica. Palaeobotany and Palynology, Utrecht University, Budapestlaan 4, 3584 the next generation Community Ice Sheet Model (http://www.clivar.org/ occurred throughout the Cenozoic. The ROSSMAP project has two CD Utrecht, The Netherlands organization/southern/CISM_Workshop_Report.pdf ). Some initiatives working groups that currently are refining ANTOSTRAT correlations based Key Words: AGAP, Aerogeophysical Data, Gamburtsev Subglacial (E-mail: [email protected] ) relevant to the ACE community may not yield data in time for AR5, but on data obtained since 1995. Mountains, Tectonic Evolution, Ice Sheet Dynamics are still vital for the future. These include BEDMAP2, with a large body of The following is a short review of findings based on geophysical surveys of ABSTRACT: new data from ICECAP and related projects, and geoscience data from key pre-LGM Antarctic glacial history for the Ross Sea outer continental shelf. Latest field data and GCM experiments imply intrinsic links between locations through SHALDRIL, ANDRILL and the Lake Ellsworth Project. Seismic data can be correlated to four DSDP Leg 28 sites, three in Eastern REF. 3555 declining atmospheric CO2 concentrations and ocean circulation changes, Basin and one in North Basin (northwest Ross Sea). The DSDP sites sampled Arctic Stratigraphic Candidates and Events for Comparison with the global cooling, Antarctic Cryosphere formation and benthic ‘Oligocene Key Words: Antarctica Paleoclimate IPCC Assessment Oligocene and younger glaciogenic sediments as well as metamorphic Antarctic Past isotope event 1’(Oi-1), near the Eocene – Oligocene (E-O) transition (~34 basement on one of several basement highs. The pre-Oligocene strata Author: Julie Brigham-Grette Ma). Yet, several climatic proxy studies deny global cooling and attribute on the outer shelf are dominated by acoustically-laminated seismic Department of Geosciences, University of Massachusetts, Amherst 01003: the entire magnitude of the Oi-1 shift to ice sheet expansion and sea level REF. 3544 facies suggesting a dominant marine influence perhaps with abundant +1-413-545-4840: (E-mail: [email protected] ) fall while others suggest a more prominent role of global cooling. Yet An Overview of Antarctic Geophysical Records meltwater and suspension-mode sedimentation. Relatively-small scale again other studies do record sea level change as well as cooling episodes, Author: Philip J. Bart troughs and other proximal grounding-line features have been identified ABSTRACT: but at differing levels, and/or in distinct steps. Analysis of organic walled Department of Geology and Geophysics, Louisiana State University, Baton near the calving front (Luyendyk et al.). These features may The Cenozoic climate evolution of the Arctic system does not mimic the cysts of surface dwelling dinoflagellates at marginal marine sites allows Rouge, Louisiana, 70803, U.S.A. be associated with temperate glaciation. In the overlying Oligocene climate evolution of the Antarctic and its surrounding seas. Few records reconstruction of both temperature as well as sea level change, unraveling (E-mail: [email protected] ) section, prograding features rim basement highs. These seismic facies anywhere are necessarily complete or numerically dated. Moreover, these interrelated signals. Examples include the type section of the latest may represent sedimentation from several isolated ice caps at a time when differences in polar geography dictate that both compatible marine and Eocene Priabonian Stage, where two distinct steps involving both cooling ABSTRACT : these basement structures were emergent. Infilling of the surrounding terrestrial histories from the Arctic be compared with the Antarctic past. as well as sea level fall mark the E-O transition; a corollary of results is the This overview concerns the glacial-history interpretation of geophysical basements was dominated by pelagic sedimentation. Others propose Geologic knowledge in three areas currently possesses the strongest questionable placement of the E/O boundary GSSP, and the important data acquired on Antarctica’s offshore areas. These surveys can also that grounded ice periodically expanded to the outer shelf as early as potential for comparison. 1) Cenozoic temperature history of marine and role of the IODP drilling offshore Wilkes Land, planned for January 2010. be used to investigate of the margin’s structural evolution. The types the early Miocene based on truncation that extends across the basins in terrestrial archives including arctic vegetation and the history of perennial of geophysical data obtained in offshore areas have included gravity, between the basement highs. Seismic features interpreted as melt-water and seasonal sea ice vs. annual ice-free conditions. 2) Debates on the timing Key Words: Eocene, Oligocene, Antarctica, Oi-1, Climate magnetic, seismic, side-scan, chirp, multibeam, etc. Geophysical data is discharge channels are last seen in section estimated to be of middle and style of the first major glaciation of the Northern Hemisphere – was either obtained from a ship’s hull-mounted devices or source and receiver Miocene age. By all accounts, shelf-wide expansions occurred in Ross Sea it a catastrophic change or a longer term shift in glaciation thresholds? 3) devices deployed from the ship’s back deck. within upper-Miocene (?) section. Likewise, seismic evidence suggests The history of high sea level events of glacioeustatic origin. REF. 3561 With respect to glacial-history analyses, a key goal is to determine the numerous expansions affected the outer shelves through the Pliocene The Arctic Ocean borderlands contains clear stratigraphic evidence for Pliocene-Recent Orbital and Sub-Orbital Variability within the Polar timing, frequency and magnitude of grounding-zone translations within and Pleistocene. In Eastern Basin, where an expanded Plio-Pleistocene forested conditions at intervals over the past 50 million years, recording Antarctic Zone of the Southern Ocean: the Biogeochemistry of Diatom- the marine environment. These goals are addressed using standard section exists, there were as many as 14 grounding events. the migration of treeline from High Arctic coastal locations within the Bearing Sediments geophysical correlations of units and surfaces interpreted to be of Canadian Archipelago. Metasequoia forests of the peak Eocene gave Authors: Robert B. Dunbar 1, David A. Mucciarone 2, Christina R. glaciogenic origin. One key problem is that the deposits and land-surface Key Words: Glacial History, Seismic Stratigraphy, Geophysical Surveys, way to a variety of biomass-rich circumarctic redwood forests by 46 Ma. Riesselman 2, Kelly Kryc 1, Eduard Costa 1 morphology created during a cycle of ice-sheet advance and retreat Continental Shelf, Ross Sea Between 23 and 16 Ma, cool-temperate metasequoia forests dominated 1. Department of Environmental Earth System Science, Stanford University, can be stripped away during subsequent cycles. Nonetheless, regional- NE Alaska and the Yukon while mixed conifer-hardwood forests (similar Stanford, CA 94305, USA scale geophysical surveys in offshore areas, which have significant to those of modern southern maritime Canada and New England) 2. Department of Geological and Environmental Sciences, Stanford accommodation, provide the best opportunity to decipher a relatively- REF. 3578 dominated the central Canadian Archipelago. By 16 Ma, these forests gave University, Stanford, CA 94305-2115, USA complete succession of glacial events preserved in cross-cutting Peering Beneath the Ice Sheet: AGAP Evidence for a More Dynamic East way to larch and spruce. From 5 to 3 Ma the braid plains of the Beaufort (E-mail [email protected] ) sequences. Antarctica Fm were dominated by over 100 vascular plants including pine and birch, Based on seismic criteria outlined in previous studies, seismic reflections Authors: Robin Bell 1, Michael Studinger 1, Fausto Ferraccioli 2, Detlef while other locations remained dominated by spruce and larch. Boreal ABSTRACT: exhibiting topset geometry, foreset truncation, regional extent (several Damaske 3, Carol Finn 4, David Braaten 5, Mark Fahnestock 6, Tom Jordan conditions across northern Greenland and arctic Alaska are consistent Sedimentary sections south of the Polar Front and particularly from tens of kilometers) and cross-cutting relationships are interpreted as 2, Hugh Corr 2, Stefan Elieff 7, Nick Frearson 1, Adrienne Block 1, Kathryn with the presence of bivalve Arctica islandica in marine sediments the continental margins of Antarctica pose significant challenges unconformities eroded by grounded ice (i.e., ice in contact with the Rose 2 capping the Beaufort Formation on Meighen Island at 80oN, correspond for paleoenvironmental reconstruction. These deposits are typically

20 21 depauperate in carbonate phases that are used as environmental signal lithosphere, ~750-1000 km wide and dominantly below sea-level. REF. 3533 that the East Antarctic Ice Sheet reached the margin at ca. 32.6 Ma, carriers and for age-dating in sub-polar, temperate, and tropical waters. Extension within the WARS was initiated in the Jurassic during initial Cenozoic Climate Change in Antarctica from Fossil Plants more than a million years after the peak of the Oi-1 isotope shift. They are often influenced by complex depositional systems that include Gondwana breakup, as marked by voluminous tholeiitic magmatism Author: Jane Francis sea ice and glacial ice as well as energetic aeolian and marine processes. along the TAM. The main phase of distributed extension within the School of Earth & Environment, University of Leeds, UK. Key Words: Cape Roberts, Sedimentary record, Eocene/Oligocene and other biosiliceous microfossils have emerged as key tools WARS was during the Cretaceous, with more localized extension during for environmental reconstruction in cores collected from the high the Cenozoic confined to the basins adjacent to the TAM. ABSTRACT: latitude Southern Ocean, along with physical stratigraphy and organic/ Models for TAM formation, the world’s longest intracontinental rift-flank Fossil plants provide a picture of climate change in Antarctic terrestrial REF. 3191 sedimentary geochemistry. Diatoms are responsible for much of the export mountains, include mechanisms that invoke mainly thermal processes, environments through the Cenozoic. After a period of cold climates Tectonic Architecture of the Amundsen Sea Embayment, West production that settles to the seabed of the Southern Ocean thereby a combination of mechanical and thermal processes related primarily to during the latest Cretaceous, the climate warmed and warmth-loving Antarctica: Basic Constraints for Ice-Sheet Dynamics simplifying some aspects of organic geochemical interpretation. Here we extension in the adjacent WARS or the mechanical effects of extension plants, such as the Proteaceae and Lauraceae, appeared once more in Authors: Karsten Gohl explore paleoenvironmental insights derived from the biogeochemistry of thick lithosphere. Lacking in all of these models is that typically they the vegetation. Climate analysis based on fossil leaf characters in the Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, of Pliocene-Recent diatom-bearing sediments from several sectors of cannot explain multiple phases of denudation along the TAM that are Cross Valley Formation, Seymour Island indicate that mean annual Germany the Southern Ocean. We consider high sedimentation rate sedimentary separated by periods of relative tectonic and thermal quiescence. Nor temperatures were ~13.5 ±7 °C during the latest Palaeocene (~55Ma?). (E-mail: [email protected] ) sections recovered from shelf basins of the Antarctic Peninsula, East do they attempt to explain the disparity between wide rifting in the Summers were very warm (warm month mean 25.7 ± 2.7°C) and winter Antarctica, and the Ross Sea, with particular focus given to the ANDRILL Cretaceous that may require hot, thin lithosphere whereas rift-flank temperatures generally remained above freezing (cold month mean 2.2 ABSTRACT: McMurdo Ice Shelf AND-1B core because of its unusually high quality uplift of the TAM may require cold-thick lithosphere. Also, because of ± 2.7°C). By the mid-Early Eocene (~51Ma) however, floras in La Meseta An understanding of the glacial history of the Amundsen Sea Embayment recovery of diatom-bearing sections extending into the Pliocene. the high elevations of the TAM, and hence the amount of uplift required, Formation on Seymour Island indicate that the climate had cooled: in (ASE) and Pine Island Bay (PIB) is essential for proposing models on Sediments collected south of the Antarctic Polar Front are unusual as well these models lie close to the limit of geodynamic possibility. just ~4 m.y. the mean annual temperature had cooled to ~10.8 ± 1.1°C. the future development of the West Antarctic Ice Sheet. This requires in that they typically exhibit low concentrations of total organic matter, The plateau collapse model (Bialas et al., 2007) for the TAM proposes Summers were still hot (warm month mean 24 ± 2.7°C) but a cold month an understanding of the tectonic history and knowledge of tectonic even when opaline silica contents exceed 50%. Decoupling of organic that the WARS/TAM was a high elevation region (West Antarctic Plateau mean of -1.17 ± 2.7°C means that plants may have been affected by frost features such es lineaments, ridges, sills and basins, because basement matter and biogenic silica preservation during settling and burial must - WAP) with thicker than normal crust before the onset of continental and it might have snowed. However, the snow would not have survived morphology and inherited erosional features control the flow direction be significant. Nevertheless, the organic fraction retains a rich record of extension. With extension the WARS underwent a topographic reversal, the warm summers. Through the late Paleogene and into the Neogene, of ice-sheets and the influx of Circum-Polar Deep Water (CDW). This is sea surface conditions, including nutrient and CO2 levels, ice conditions, leaving the TAM as the remnant edge of the former plateau (in the cold-tolerant southern beech then dominated the vegetation, surviving an attempt to reconstruct the tectonic history with the aim to search for and algal/zooplankton assemblages. For this paper we examine the Cretaceous), with later uplift in the Cenozoic. The concept of the WAP as small hardy shrubs in harsh tundra conditions in a land of glaciers. basement features and crustal boundaries which may be correlated to factors that control C and N contents as well as 15N and 13C in modern and its later collapse has implications for the paleotopography of the Temperatures in summer must have intermittently risen to a few degrees the flow and dynamics of the ice-sheet. The Amundsen Sea Embayment water column particulate matter and surface sediments from around West Antarctic-TAM region, and hence the establishment of ice sheets above freezing to allow growth and reproduction but for most of the of West Antarctica is in a prominent location for a series of tectonic and the Antarctic margin to develop an interpretive scheme for similar on Antarctica. The Bialas et al. numerical model for plateau collapse year these little trees lived in harsh freezing conditions in nutrient-poor magmatic events from Paleozoic to Cenozoic times. Seismic, magnetic measurements from the mid-Pliocene sections from the Southern Ross does not generate a remnant plateau edge with the present elevation soils, clinging to the ground for protection from the cold winds. When and gravity data from the embayment and PIB reveal the crustal thickness Sea. 13C values of freshly produced organic matter in Antarctic waters (~4 km) of some TAM peaks. Rather the elevation of the post-wide glaciation was at its peak and summer temperatures dropped below and significant tectonic features. NE-SW trending magnetic and gravity reflect variability in seawater [CO2]aq, 13C CO2, the amount of CO2 rifting (late Cretaceous) remnant plateau-edge (proto-TAM) was likely freezing southern beech finally became extinct in Antarctica. anomalies and the thin crust indicate a former rift zone which was active drawdown, and , the net photosynthetic fraction factor, a function of in the ~2 km range, since accentuated by the isostatic response along during or in the run-up to the breakup process between Chatham Rise algal species, cell size, and metabolic rate. Many of the variables are highly the range front due to erosion, especially wet-based glacial erosion Key Words: Fossil Plants; Climate Change; Biodiversity; Terrestrial and West Antarctica before or at 90 Ma. NW-SE trending gravity and correlated within specific algal blooms resulting in a clear C isotopic after 34 Ma that has enhanced peak heights by up to 50% (~2 km). magnetic anomalies, following a prolongation of Peacock Sound, indicate signature for sea ice algae, diatom blooms, and open water lower level The WAP formed inboard of the active Pacific margin of Gondwana, likely the extensional southern boundary to the Bellingshausen Plate which productivity. 15N reflects variability in extent of NO3- utilization through soon after the Cambro-Ordovician Ross Orogeny and continuing to REF. 3577 was active between 79 and 61 Ma. It is likely that the prominent Pine a Rayleigh effect on NO3- 15N and well as , the net photosynthetic develop as slab rollback moved the margin outboard, until subduction Orbitally Paced Sedimentary Record across the Eocene/Oligocene Island Trough follows a structural boundary between the crustal blocks fraction factor for N. DiFiore (2009) has recently shown that is relatively along the margin ceased in the late Mesozoic. Many components of Boundary Glaciation in the Western Antarctic Margin of Ellsworth Land and Marie Byrd Land. Data are shown from the ASE and constant south of the polar front, allowing us to use downcore variability the geological/tectonic history of the region support the existence Authors: Simone Galeotti 1, Robert DeConto 2, Luca Lanci 1, Sonia PIB which can be interpreted in context with the reconstruction of the ice in 15N as a tracer of past nutrient utilization. of the WAP, including along-strike analogy with Australian geology Sandroni 3, Franco Talarico3 advance and retreat history in this area. Differences in the behaviour of Holocene sedimentary sections from around the margin show substantial (Lachlan Fold Belt), the paleocurrent record of Beacon Supergroup 1. Istituto di Scienze della Terra Università di Urbino ‘Carlo Bo’, Località the ice-sheet are shown to exist for the western and eastern parts of PIB sub-orbital variability in 15N and 13C as well as the sedimentary fluxes sediments along the TAM, the geological record of Marie Byrd Land and Crocicchia, 61029 Urbino Italy due to basement structures affecting the inflow of CDW. of organic C. This variability appears queued by substantial changes in the presence of mid-crustal rocks exhumed there during Cretaceous 2. Department of Geosciences, University of Massachusetts, USA upper water column productivity moderated by sea ice and windiness. plateau collapse. 3. Dipartimento di Scienze della Terra Università di Siena, Italy Key Words: Tectonics, Basement, West Antarctic Ice-Sheet Similar styles of variability appear present in diatom-bearing sections of An implication of the WAP is the presence of high paleo-topography (E-mail: [email protected] ) the ANDRILL 1B drill core, presumable deposited during warm intervals outboard of the present TAM. Paleocurrents in the lower units of of the Pliocene when the Ross Sea contained a greatly reduced Ross the Beacon Supergroup indicate relief on the Kukri erosion surface ABSTRACT: REF. 3594 Ice Shelf. The results also argue for the episodic influence of sea ice and initially controlled deposition patterns, but as deposition continued The vertical distribution of lithofacies from glacimarine sequences Palaeo-Accumulation Rates in East Antarctica Deduced from the SPRI substantial changes in the community of primary producers. We conclude paleocurrents indicate elongate basins parallel to the current TAM with recovered during the Cape Roberts Project displays cyclicity,which is Lines by examining the possible elucidation of full glacial-interglacial cycles high topography either side. From this evidence, a topographic reversal interpreted as the sedimentary response to fluctuations in relative sea Authors: Gwendolyn J-M. C. Leysinger Vieli1,2, Richard C.A. Hindmarsh1, as manifest of the biogeochemistry of the diatom-bearing units and between the WARS and TAM has occurred since the end of the Triassic. level. These changes are associated with climatic cycles and/or cycles Martin J. Siegert3 implications for the nature of conditions during the coldest parts of the Low-temperature thermochronology results along the TAM indicate of glacial advance and retreat (e.g. CRP Science Team, 2001; Naish et 1. Physical Science Division, British Antarctic Survey, High Cross, Madingley glacial cycle during the mid-Pliocene. that polarity of Cenozoic denudation is strongly toward the WARS, with al., 2001), thus providing a unique opportunity to directly compare Road, Cambridge, CB3 0ET, UK ~4-9 km of denudation along the TAM Front. Along the north wall of ice volume changes against the available high-resolution temperature 2. Geography Department, Durham University, South Road, Durham, Key Words: Southern Ocean, Paleoceanography, Stable Isotopes, Pliocene, the Ferrar Glacier, three vertical profiles with apatite fission track and and ice-volume proxy records derived from deep-sea records. g.j.m.c.Leysinger ANDRILL (U-Th)/He data indicate episodes of denudation in the Cretaceous, Here we present data from the CRP3 core that are based on available 3. Grant Institute of Geology, West Mains Road, Edinburgh, EH9 3LW Eocene and Oligocene. The polarity of Cenozoic denudation in these bio- and magnetostratigraphic data (CRP Science Team, 2001; Florindo (E-mail: [email protected] , [email protected] , [email protected] ) profiles is strongly toward the coast. However, the magnitude of et al., 2005), spanning the upper part of Chron C13r to the uppermost REF. 3518 Cretaceous denudation (initiated ~100 Ma) is apparently greater in the Chron C12r. The analysis of luminance data, which reflects fluctuations ABSTRACT: Formation of the Transantarctic Mountains and West Antarctic Rift inland profiles, suggesting high topography outboard of these profiles between marly and sandy sedimentary end members and clast East Antarctica is a region where current and past mass-balance data System from Collapse of the West Antarctic Plateau: Thermochronologic (McMurdo Sound region) and that the edge of the WAP in the mid- abundance, reveals an orbital control over the deposition of the CRP-3 are sparse, but are a basic necessity for understanding past and future and Geologic Constraints Cretaceous was located near the present TAM Front. Between the mid- sedimentary succession. Frequency filtering of individual components changes of the ice sheets. Radardetectable englacial layers act as an Author: Paul Fitzgerald Cretaceous and the early Cenozoic, a topographic reversal occurred in in the orbital bands allows us to obtain the first cyclostratigraphy-based archive and permit us to assess past variability in accumulation rates. We Department of Earth Sciences, Syracuse University, Syracuse, NY 13244, this region – contemporaneous with extension and plateau collapse in calibration of the Antarctic marginal record to well-resolved oceanic use a three dimensional ice flow model to deduce past accumulation rates USA the WARS. sequences across the major step of glaciation occurring during the from layering, measured from the most extensive radio-echo sounding (E-mail: [email protected] ) The concept of plateau collapse model for the WARS/TAM is supported Eocene-Oligocene transition. (RES) survey of East Antarctica (undertaken during several field seasons by regional geological information, and appears to solve a number Based on the astrochronological ages obtained from this study and in the 1970s). The model generates velocities from modern balance ABSTRACT: of geological/geophysical discrepancies in previous models. Nor is it changes in the power spectra of individual orbital periodicities, fluxes, and the age equation is solved to generate ages and isochrone The Transantarctic Mountains (TAM) define the boundary between East mutually exclusive with respect to other models that explain Cenozoic we recognize a lower interval (34-33 Ma) characterised by high geometry. Temperature is also solved for using balance velocities, using and West Antarctica and form the western flank of the West Antarctic development of the TAM to high elevations by other means (e.g., sedimentation rates where precession cycles still dominate. Starting an iterative algorithm which takes into account basal melting. Using this rift system (WARS). The TAM stretch for >3000 km, reach elevations thermal effects of hot West Antarctic mantle lithosphere). It is also from the midlle part of Chron C12R, sedimentation rates markedly model we deduce reconstructions for accumulation rate trends for the >4000 m and are capped by undeformed strata of the Devonian-Triassic testable in the geological record and provides a framework for further decrease and the record becomes dominated by obliquity and long Holocene and investigate limitations and uncertainties of our model, Beacon Supergroup. Low-temperature thermochronology constrains study. eccentricity cycles. These results are in agreement with modelling such as 3D-flow effects and geothermal heat flux. For example, we found the denudation history along the TAM with well-delineated episodes of orbitally forced changes in Oligocene Antarctic ice volume and that our reconstructions of isochrone geometries were highly improved of denudation in the Jurassic, early Cretaceous, late Cretaceous, Eocene Key Words: Transantarctic Mountains, West Antarctic Rift System, sedimentary fluxes proposed by Pollard and DeConto (2003). The by including 2D-horizontal advection. Areas of significant anomalies in and Oligocene. The WARS is a broad region of extended continental Thermochronology, Denudation History, Plateau Collapse development of fully glacimarine facies containing diamictites shows Holocene mass balance relative to the present mass balance distribution

22 23 have been identified. Such deviations may be important for better GLIMMER ice sheet model. Modelled erosion is controlled by the basal with an apparent progradation towards the southwest. These sequences Our consideration of possible mechanisms for the observed retreat constraining existing transient ice sheet models. thermal regime and melt-rates and allows large-scale investigation of the are associated with a flat-topped ridge at their distal (southwest) end, at of the marine ice margin of Mac.Robertson Land favours rapid rates relationships between ice masses and long-term landscape evolution. 1200–1400 m depth. We interpret the offlapping sequences to be deltas of eustatic sea level rise associated with Meltwater Pulse 1a (MWP-1a) Key Words: East Antarctica, 3D Ice flow model, Accumulation rates By linking Oligocene climate with that of present-day Patagonia we formed adjacent to the grounding line of a glacier, and the flat-topped ridge at ~14 ka BP and warming of the marginal oceans and atmosphere to initiate ice growth and by subsequently step-cooling and drying the to be a moraine. Above the deltas we interpret the flat-topped ridges to be near-modern levels ~2 ka later. In support of this interpretation is the system we simulate the Antarctic ice sheet at a number of stages. We buried moraines, and the broad troughs the result of carving by Oligocene comparison of our land-marine sequence to other well-constrained REF. 3585 do not model an absolute chronology, but instead simulate multiple glaciers. A correlation path from DSDP-270 to northeast RvSB is 450 km- marine deglacial events from both West and East Antarctica, including Connecting the Tropics and the Poles with Heat Transport and scenarios of ice extent. Between 34-14 Ma there are fluctuations between long, but correlation is clear because of uniform marine deposition and lack the Ross and Weddell Sea embayments. The timing and magnitude of Teleconnections local, regional and continental ice sheet extent that are superimposed of deformation. This clearly demonstrates that the stratigraphic section to ice retreat also compares well with an independent, continent-wide ice Authors: Matthew Huber upon a progressive cooling of climate. Between 14-13.6 Ma, maximum be cored in RvSB lies beneath the late Oligocene sediments recovered at modelling experiment. Department of Earth and Atmospheric Science, Purdue University, West ice sheet extent is reached. Since 13.6 Ma, the ice sheet has been similar DSDP-270 spanning the Eastern Basin. Our results show that periods of rapid sea level rise can initiate instability Lafayette, IN 47907 in scale to the present-day. By associating 6 modelled scenarios of ice We have documented and prioritized 26 drill sites in the RvsB area and in Antarctica’s ice masses, including the margins of East Antarctica, and (E-mail: [email protected] ) sheet extent with the pattern of global climate change we analyse the are planning to core 9-10 of these, and recover ~500-1000 m of sediment. indicate that a combination of sea level rise and oceanic warming is a distribution, longevity, magnitude, direction and mode of glacial erosion Seven of the primary sites have targets in the upper 50 m with two at powerful driver of ice retreat. ABSTRACT: since the Oligocene. 100 m. Seventeen sites are held as alternates with similar objectives. High latitude climate and ice sheet stability are sensitive to changes in Our analysis suggests that although the pre-glacial fluvial and tectonic The highest priority sites are aimed at sampling greenhouse world Key Words: Ice Retreat, Last Glaciation, Marine, Terrestrial, Modelling tropical climate and meridional heat transport. Ocean gateway changes landscape is a critical driver of erosion, it has survived largely intact under environments including synrift sediments of Eocene or Cretaceous age, from the Eocene through the Miocene have long been thought to govern the ice sheet. The interior of Antarctica may have been subject to less than the putative Oi1 transition, the earliest glaciation in MBL, and records of heat transport. Results presented show that this effect has been relatively 200 m of erosion and we predict that the landscape is glacially scoured, waxing and waning Oligo-Miocene ice. The Paleogene and older section REF. 3540 small. The teleconnected impacts of tropical climate states, e.g. the change but supports strongly streamlined features where ice flow directions dips west and may be exposed in outcrop to the east of the glacial The Glacial and Climate Record of the Dry Valleys, Southern Victoria of a ‘permanent El Niño’ in the pre-Quaternary, have been proposed as have been consistent over time. Cold-based ice is predicted for 34 Myrs troughs where a composite stratigraphic section of Eocene (?) and older Land an alternative hypothesis to explaining high latitude climate change. As across the Gamburtsev Mountains and in parts of Dronning Maud Land, sediments can be recovered with overlapping cores. At all sites we aim to Authors: David Marchant 1, Adam Lewis 2, Allan Ashworth 2, Douglas it turns out, the presence of enhanced ocean vertical mixing proves to suggesting little or no erosion since this time. This supports recent field estimate paleo water depths or terrestrial conditions using microfossils, Kowalewski 3, Kate Swanger 4, Jane Willenbring 5, Sean Mackay 1. be crucial both for invigorating ocean heat transport and for maintaining evidence from the Gamburtsev region which shows the survival of alpine- and sedimentary parameters. Northeast of the study area we have located 1. Department of Earth Sciences, Boston University, Boston MA 02215 a ‘permanent El Niño’-like state. The potential role of hurricane induced scale glacial erosion features. At coastal margins trough overdeepening a submarine plateau that we interpret as a subsided Miocene wave-cut 2. Department of Geosciences, North Dakota State University, Fargo, ND mixing on high latitude climate is investigated. may have increased relief by over 2 km, with the most significant incision surface. This implies a middle Miocene ice-free coast. The interpretation 58105 being coincident with long-lived stable ice flow features, the largest of its age and origin can be tested by drilling and is one of our second 3. Climate System Research Center, Department of Geosciences, University Key Words: Tropic-to-Pole, Heat transport, Teleconnections tectonic features and the oldest passive margin topographies. The priority objectives. If it proves wave cut, it will provide a control point of Massachusetts patterns and rates of glacial erosion correspond well with evidence of for subsidence models, and an age for coastal ice-free conditions after Amherst, MA 01003 shorter-lived Pleistocene ice sheets in the northern hemisphere. initiation of the WAIS. Basement also is near the seafloor and can be 4. Department of Geology, Colgate University, Hamilton NY 13346, REF. 3586 sampled on both sides of the Roosevelt Ridge. 5. Institut für Mineralogie Universität Hannover, Callinstraße 3, D-30167 Antarctic Orbital Variations - All the Usual Suspects Key Words: Modelling, Erosion, Landscape Evolution, Ice Sheet Stratigraphic and paleoelevation data from core analyses will aid Hannover Author: Peter Huybers in constraining coupled ice-climate modeling for the early WAIS. (E-mail: [email protected] ) Department of Earth and Planetary Sciences, Harvard University, 20 Paleoelevation (depth) is a critical constraint on ice sheet modeling. Our Oxford St., Cambridge, MA 02138 USA REF. 3345 preferred working hypothesis is that WANT was at higher elevation near ABSTRACT: (E-mail: [email protected] ) Proposed Shallow Drilling Program (Shaldril) in Eastern Ross Sea: the end of the Eocene and hosted a significant ice sheet that fed flowing A fundamental question in Antarctic science is the inception of the present, Evidence for Oligocene West Antarctic Ice Sheet ice, which resulted in the buried features we plan to sample. Modeling polar East Antarctic Ice Sheet. The ice sheet, including its associated girdle ABSTRACT: Authors: Bruce Luyendyk 1, Doug Wilson 1, Christopher Sorlien 1, Louis studies will help to establish the possibility for this and for the timing and of sea ice, has been described as the most prominent physical feature on Concentration of obliquity and precession period variability are clearly Bartek 2, Sherwood Wise 3, James Kennett 1, Frank Rack 4, Rob DeConto 5, extent of the development of the WAIS. Earth. Ocean and atmospheric processes that link low-latitude regions discernible in Antarctic ice core proxies of atmospheric temperature, David Pollard 6, Amelia Shevenell 7 with Antarctica as a major heat sink are critical factors that drive global but their origins remain uncertain. Proposed mechanisms range from 1. Univ. of California, Santa Barbara, USA Key Words: West Antarctica, West Antarctic Ice Sheet, Ross Sea, SHALDRIL climate. Consequently, changes in ice-sheet configuration may result responses to local changes in insolation, Northern Hemisphere summer 2. Univ. of North Carolina, Chapel Hill, USA in modification of biogeochemical cycles, changes in ocean circulation, insolation, and atmospheric CO2. Other suggestions call on the manner in 3. Florida State Univ., USA evolution of surface and deep-water chemistry, and changes in eustatic which the seasonal cycle is recorded by the proxies to yield orbital period 4. Univ. of Nebraska, Lincoln, USA REF. 3182 sea level. Even so, little is known about the evolution of this ice sheet or the variations. Thus, the origins of the orbital period variations are uncertain 5. Univ. of Massachusetts, Amherst, USA Last Major Retreat of Antarctic Ice Sheets Forced by Sea Level Rise and environmental conditions that fostered its development. Ten years ago, not so much for lack of possibilities, but because of an inability to 6. Pennsylvania State Univ., USA Ocean Warming the Antarctic community raised the following questions: Did the modern distinguish between them. The ability to merely generate a signal which 7. Univ. College, London Authors: Andrew Mackintosh1, Eugene Domack2, Nicholas Golledge1, polar East Antarctic Ice Sheet develop during latest Pliocene time? Or did resembles the orbital variations contained in the Antarctic temperature (E-mail: [email protected] ) Robert Dunbar3, the Antarctic cryosphere evolve much earlier during Miocene time? Was proxies is too permissive a criteria by which to evaluate the hypotheses. Amy Leventer4, Duanne White5, David Fink6, Damian Gore5, Caroline there a precursor to the modern East Antarctic Ice Sheet? If so, what were A few observations are made which may permit further distinguishing ABSTRACT : Lavoie2, David Pollard7 and Robert DeConto8. the characteristics (thermal regime, configuration, flow patterns) of that between the various Antarctic orbital hypotheses. First, analysis of the Three marine geophysical surveys in the far eastern Ross Sea (eRS) have 1. Antarctic Research Centre, Victoria University of Wellington, New ice-sheet? Finally, what changes (physical and climatological) brought on atmospheric CO2 record suggests that it accounts for about half of the revealed geologic features that offer promise for understanding the Zealand. the development of the present ice sheet? Today, 10 years later, we still observed orbital variations in temperature. Second, similarity between Cenozoic global climate transition, and ice sheet and tectonic development 2. Geosciences, Hamilton College, Clinton, New York, USA. grapple with these same questions. Significant advances have come from marine sea surface temperature proxies and the Antarctic temperature in West Antarctica (WANT). Shallow drilling (SHALDRIL; ~50-100 m) of 3. Environmental Earth System Science, Stanford University, Stanford, the study of offshore cores in the Ross Embayment, but for each question proxies argues against the Antarctic orbital variations being an artifact subbottom sediments in the far southeastern Ross Sea can explore several California, USA. answered, new ones have emerged. For many of these questions, the of how the seasonal cycle is recorded. Further, the likeness between the hypotheses concerning the role of WANT and the West Antarctic Ice Sheet 4. Geology, Colgate University, Hamilton, New York, USA. central theme concerns the potential for spatial variability in climate Antarctic and marine sea surface temperature proxies suggests that, in (WAIS) on global climate evolution, Antarctic glaciation, and lithosphere 5. Environment and Geography, Macquarie University, Sydney, Australia. and glacial records in the Ross Embayment. Specifically, do established addition to CO2, a similar climatic mechanism is operating from the subsidence in the Ross Sea. We have proposed to use a ship-based drilling 6. ANSTO, Sydney, Australia. records measure local changes, or can they be used as a proxy for larger- southern mid-latitudes to the pole, possibly sea ice. system for coring at nine or more sites comprising a Cretaceous (?) through 7. Earth and Environmental Systems Institute, Pennsylvania State scale variations? And, what is the range of climate conditions that remain Miocene section during a six-week expedition. The study area is proximal University, USA. consistent with the presence of a polar East Antarctic Ice Sheet? The Key Words: Antarctica, Antarctic temperature proxies, Orbital variations to the WAIS, and distant from potentially complicating influences of the 8. Department of Geosciences, University of Massachusetts, Amherst, answers to these questions will come from detailed modeling studies, but East Antarctic Ice Sheet. USA. underpinning such studies must be field data with precise chronologic Seismic reflection and multibeam bathymetry data taken on NBP03-01 (E-mail: [email protected] ) control. REF. 3478 and 03-06 were acquired in areas including the eRS that were covered by Here, we outline the major steps in the evolution of the Antarctic Predicting the Subglacial Landscape Evolution of Antarctica Ross Ice Shelf until 2000, when giant icebergs calved. Both reflection and ABSTRACT: cryosphere as recorded in glacial and non-glacial sediments of Dry Valleys Authors: Stewart S.R. Jamieson1, David E. Sugden 1, Nicholas R.J. Hulton 1 bathymetry data image basement exposed at or near the seafloor on a The retreat of Antarctic ice sheets during the transition from the last region (78ºS, Transantarctic Mountains). Recent advances have focused 1. School of GeoSciences, University of Edinburgh, Drummond St., ridge named Roosevelt Ridge (RvR) extending north from the Roosevelt glacial period to the Holocene provides the most recent example of on the region’s vegetation history, its record for alpine and mountain Edinburgh, EH8 9XP. Island ice dome in the eRS. A ~3 km-deep sedimentary basin, the Roosevelt ice sheet response to major climate forcing and thus allows rates of ice glaciation, and its record for ice-sheet overriding and subsequent decay. (E-mail: [email protected] ; [email protected] ) Sub-Basin (RvSB), is present between this ridge and western Marie Byrd sheet decay and coupling to sea level rise to be quantified. We observe When pieced together, the composite terrestrial record calls for (1) a Land (MBL). The RvR bounds an area of buried features that appear to through a combination of land- and marine-based geochronology and dynamic ice sheet with wet-based mountain glaciers up until ~13.9 Ma; ABSTRACT: represent evidence for Oligocene glaciers or ice streams flowing off WANT. ice sheet modelling, a highly-resolved temporal record of deglaciation (2) abrupt cooling and extinction of a sparse tundra biome at ~13.8 Ma; The aim is to predict patterns of glacial erosion across Antarctica. This can Multichannel and single channel seismic refection data reveal a succession of the East Antarctic Ice Sheet across the Mac.Robertson Land shelf. Our (3) reorganization of alpine glaciers from wet- to cold-based regimes at help us understand feedbacks between ice dynamics and erosion and of broad (10–20 km) and narrow (2–5 km) buried U-shaped troughs in the reconstruction demonstrates that deglaciation of deep-shelf troughs and ~13.8 Ma, and coeval expansion of the East Antarctic Ice Sheet across comprehend what drives the distribution of erosion under ice masses. RvSB; a succession of flat-topped ridges separates the narrow troughs. Below lowering of the ice sheet surface occurred in two phases, from 14-12 and most of the Dry Valleys; (4) modest fluctuations of outlet glaciers, with We have developed a model of glacial erosion that is coupled to the the interval of troughs is a 200-m-thick succession of offlapping sequences 12-7 ka before present (BP). recessional moraines for Taylor Glacier, for example, dated at ~12 Ma,

24 25 ~10 Ma, ~7 Ma, and ~3 Ma, and for Ferrar outlet glacier at ≤4-5 Ma; (5) The emerging body of literature suggests that Antarctica, and especially associated with the loss of the WAIS and up to +3m in equivalent sea we were able to test the sensitivity of subglacial lakes to subglacial lake modest ice expansion, relative to today, during middle Pliocene time; (6) West Antarctica, is undergoing warming in a manner that is consistent level from the East Antarctic ice sheet, in response to oceanic melting. drainage. Experiments clearly demonstrate that small changes in surface development of stagnant, debris-covered glaciers at high-elevations, with with the rest of the Southern Hemisphere, but substantially greater During interglacial times, diatomaceous sediments indicate high marine slope are sufficient to start and sustain episodic subglacial drainage the oldest ice yet documented at ~8.1 Ma; and (7) Quaternary changes interdecadal variability is superimposed. Linkages with high latitude productivity, minimal summer sea ice and air temperatures above freezing events. Therefore, lake drainage can be regarded as a common feature of in the level of outlet glaciers and alpine glaciers have been minor, but and tropical modes of climatic variability have been established. For in Ross Embayment, suggesting an additional influence of surface melting the subglacial hydrological system and may influence to a large extent greatest variability has occurred near the coast. Taken together, the data example, trends in the Southern Hemisphere Annular Mode during the under conditions of elevated CO2. the present and future behavior of large ice sheets. Recently, a subglacial call for a stable climate and East Antarctic Ice Sheet since middle Miocene past 30-40 years that are partly related to anthropogenic forcing have lake circulation model was dynamically coupled to this ice sheet model to time in interior regions of the Transantarctic Mountains. Unknown, had a considerable impact on the Antarctic atmosphere, ocean, and sea Key Words: Orbital, Andrill, West Antarctic Ice Sheet, Pliocene. investigate the sensitive interplay of melting and refreezing processes at however, is the level of maximum potential atmospheric warming in the ice. Additionally, the tropical El Niño-Southern Oscillation has a strong- the ice/water interface. Ross Embayment, at sea level, that would be consistent with this record. but-intermittent teleconnection with the Antarctic that is most strongly The data from the Dry Valleys, however, could be consistent with large- manifested in West Antarctica. REF. 3554 Key Words: Subglacial lakes, Ice sheet dynamics, Modelling scale fluctuations of marine-based ice sheets, for which the main driver is Important issues still remain. For example, the causality of regional ocean The Role of Carbon Dioxide during the Onset of Antarctic Glaciation ocean temperature and sea-level change. warming in the Bellingshausen Sea is not well known although it has been Authors: Mark Pagani 1, Zhonghui Liu 2, Steven Bohaty 3, Robert DeConto linked to amplified atmospheric warming and to accelerated ice discharge 4, Matthew Huber 5, Jorijntje Henderiks 6 REF. 3496 Key Words: Antarctica, Dry Valleys, Cenozoic Climate Change, East from nearby glaciers. Ice sheet models are being developed to address 1. Yale University, 210 Whitney Avenue 06511 New Haven, USA Estimating Eustasy and Ice Volume from Backstripped Low-Latitude Antarctic Ice Sheet, Geomorphology. questions about the potentially non-linear response of the ice sheets to 2. Hong Kong University Stratigraphy enhanced warming of the ocean and atmosphere, and the subsequent 3. University of Southampton Author: Stephen F. Pekar 1 consequences for sea level rise in forthcoming centuries. Finally, the 4. University of Massachusetts 1. Queens College, CUNY, School of Earth and Environmental Sciences, REF. 3587 relative roles of natural and anthropogenic forcing on the Antarctic 5. Purdue University 65-30 Kissena Blvd., Flushing, New York 11367, USA and Lamont-Doherty Ocean Heat along the West Antarctic Margin: Source, Delivery and climate system have yet to be elucidated. 6. Stockholm University Earth Observatory of Columbia University, Palisades, New York 10964, History (E-mail: [email protected] ) USA. Author: Douglas G. Martinson Key Words: Antarctica, Climate Variability, Last Century, Teleconnections (E-mail: [email protected] ) Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY ABSTRACT: 10964 Published CO2 records for the Eocene-Oligocene (E-O) climate transition— ABSTRACT: (E-mail: [email protected] ) REF. 3490 an episode of rapid and massive ice accumulation on Antarctica—appears One of the most critical and intractable problems in stratigraphy is the Orbital Influences on the Pliocene Antarctic Ice Sheets to defy expectations of a close CO2-climate relationship. Coarsely resolved extraction of intertwined eustatic (global sea level) and tectonic signals. ABSTRACT: Authors: Tim Naish, the ANDRILL McMurdo Ice Shelf Science Team CO2 estimates suggest that an increase in CO2 occurred prior to global Despite attempts in the last few decades to separate the effects of This presentation reviews 17 years of gridded ocean data findings related Antarctic Research Centre, Victoria University of Wellington, PO Box 600, cooling, while the large drop in CO2 followed the climate transition. tectonics from eustasy, significant problems. The extraction of these to the delivery and influence of ocean heat along the western margin of Wellington. This introduces the paradoxical proposition that an increase in CO2 was two signals from the stratigraphic record of transgressive and regressive the Antarctic Peninsula. The ocean data have been collected every austral (E-mail: [email protected] ) responsible for Antarctic glaciation, while the climate shift and changes in facies is of considerable importance. An eustatic curve would make summer since 1992 by the Palmer Long Term Ecological Research (PAL weathering regimes were responsible for the subsequent CO2 decrease. an outstanding chronostratigraphic tool. Knowing the part of any LTER) program allows identification of the water mass containing the heat ABSTRACT: Importantly, the long-term alkenone-based CO2 record for the Paleogene given stratigraphic record, which is tectonic rather than eustatic would (Upper circumpolar Deep Water; UCDW), the primary paths of delivery An understanding of the behaviour of the marine-based West Antarctic derives from a composite of ocean localities, and continuous records be instrumental in interpreting facies relations and in predicting the onto the shelf, air-sea heat fluxes and spatio-temporal patterns of the Ice Sheet (WAIS) during the ‘warmer-than- present’ early-Pliocene epoch across the E-O are not represented. presence of source and/or reservoir horizons. The eustatic signal would warm water. The available ocean heat content (i.e., relative to the freezing (5–3Myr ago) can provide insights into the possible range of ice-sheet For this study we have reconstructed continuous temperature and CO2 provide an important reference against which to determine the tectonic point) on the shelf (Q), has risen steadily since 1990 predominantly due behaviour and sea-level rise due to future global warming. In this talk I will records across the E-O climate transition from high-latitude and tropical signal in a complex tectonic regime. Finally, a significant portion of to increased upwelling (84%), and somewhat (21%) due to a warming of present the marine glacial record of WAIS inferred from the upper 600m sites. Our results indicate a clear divergence in the carbon isotopic this eustatic signal is often tied to continental ice sheets and climate, the UCDW. The heat content during preceding decades was considerably of theAND-1B sediment core recovered from beneath the northwest part composition of alkenones between Subantarctic/Southern Ocean sites therefore, knowing the eustatic history would provide important clues to lower. If the increase in heat was due to warming of tropical waters by of the Ross Ice Shelf by the ANDRILL Program (Naish et al., 2009, Nature). and low-latitude/Northern Hemisphere sites. In general, Subantarctic/ the Earth’s climatic past and cryospheric history. The purpose of this talk is absorption of global warming that penetrated to depth, and then traveled Analysis of the core demonstrates 40,000 year cyclic variations in ice- Southern Ocean sites are characterized by more negative 13C values to illustrate that with a two-dimensional, sequence-stratigraphic data set south to the ACC, the implication is that there will be decades of additional sheet extent linked to cycles in solar radiation influenced by changes and thus yield higher calculated CO2 values. Such differences could be and detailed paleobathymetry in a thermally subsiding, tectonic regime, ocean heat (enhanced glacial melt) long beyond any reduction in global in the Earth’s orbit (axial tilt, obliquity) during the Pliocene. The data attributable to differences in CO2 equilibrium between localities, growth it is possible to extract the eustatic signal at the scale of half-million year warming. The western Antarctic region is unique, being the only region provide direct evidence for orbitally-induced oscillations in the WAIS and rate, or cell geometry. Our preliminary data indicates that significant variations. While other causal factors in eustatic change are indoubably where the Antarctic Circumpolar Current (ACC) flows directly adjacent to the marine margins of the East Antarctic ice Sheet. These periodically differences in cell geometry between which could have resulted from influencing the eustatic record, they are either relatively minor and within the continental margin, making the warm UCDW directly accessible to collapsed, resulting in a switch from grounded ice, or ice shelves, to open higher mixed-layer CO2 concentrations at Subantarctic/Antarctic sites. As the uncertainties of this method (e.g., thermal expansion and contraction the glaciers. While our LTER grid is only along the Antarctic Peninsula, it waters in the Ross embayment when planetary temperatures were up to a consequence of these influences, it is preferred to select stable, well- of seawater) or occur at more than the million year time scale (e.g., tectno may be a reasonable analog to ocean heat processes in the Pine Island 3°C warmer than today, and atmospheric CO2 concentration was as high stratified ocean localities when constructing CO2 records. Accordingly, eustasy). Glacier region where the ACC first makes contact with the continental as 400 p.p.m.v. elimination of Subantarctic/Antarctic sites from the long-term record shelf. Results from my recent IPY mooring array in the LTER grid, giving Historically, the lack of precession in the geological record has been indicates that CO2 levels fell sharply across the E-O climate transition Key Words: Eustasy, Apparent Sea Level, Ice Volume, Oligocene, indications regarding the mechanisms of UCDW delivery onto the shelf, attributed to the importance of annual insolation that is controlled by coincident with global cooling and ice accumulation. Backstripping will also be discussed. obliquity, with more influence on polar temperatures than seasonal insolation modulated by precession. Given the sensitivity of WAIS mass Key Words: CO2 Eocene-Oligocene Key Words: Antarctic Peninsula, Ocean heat, Mechanisms of delivery, balance to ocean temperature (as implied by a new ice sheet model, REF. 3337 History Pollard and DeConto, 2009, Nature), we suggest that 40 kyr orbital cycles Some Aspects of Antarctic Ice Sheet Evolution from the Eocene to the may regulate southward export and upwelling of Circumpolar Deep REF. 3575 Future Water (CDW) with consequences for melt rates at grounding lines of Modelling Subglacial Lakes and Their Influence on Antarctic Ice Sheet Authors: David Pollard 1, Robert M. DeConto 2 REF. 3588 Antarctic ice sheets. The low abundance of sea-ice-associated diatoms Dynamics 1. Earth and Environmental Systems Institute, Pennsylvania State Climate Variability and Change in Antarctica during the Past Century (<5%) in the Early Pliocene diatomite intervals of the AND-1B cycles Author: Frank Pattyn University, University Park, Pennsylvania 16802, USA. Author: Andrew Monaghan suggests that sea surface and air temperatures may have been above Laboratoire de Glaciologie, Université Libre de Bruxelles, Belgium 2. Department of Geosciences, University of Massachusetts, Amherst, Research Applications Laboratory, National Center for Atmospheric freezing for a significant part of the austral summer. On long time-scales, (E-mail : [email protected] ) Massachusetts 01003, USA. Research, Boulder, Colorado insolation integrated over the length of summer (summer energy) has (E-mail: [email protected] ) (E-mail: [email protected] ) been shown in models to control the surface melting of ice sheets at ABSTRACT: the obliquity period, providing the ablating margin is at high latitude, Despite the large amount of subglacial lakes present underneath the ABSTRACT: ABSTRACT: and that the surface temperature remains above 0˚C for a significant East Antarctic Ice Sheet and the melt processes involved, the hydrology This talk summarizes recent work with 3-D ice sheet and climate models Though many gaps in our knowledge still exist due to the challenges of part of the season (Huybers & Tziperman, 2008). Although, the latter beneath the ice sheet is poorly understood. The ice flow across subglacial applied to (i) the first major growth of Antarctic ice near the Eocene- performing research over the vast Antarctic ice sheets and surrounding condition is not at present met by the Antarctic ice sheet, its surface melt lakes can be regarded as the flow of an imbedded ice shelf, as the lake Oligocene boundary, (ii) Pliocene-Pleistocene variations of the West Southern Ocean, substantial progress has been made toward threshold may have been exceeded during the Early Pliocene and may be is an area of zero basal friction. Subglacial lakes influence ice flow in Antarctic Ice Sheet (WAIS) through the last 5 million years, and (iii) possible understanding Antarctic climate variability during the past century. exceeded again in the next century. Furthermore, documented in-phase many ways, through an ice velocity speedup, changes in direction of future retreat of WAIS due to anthropogenic warming. The advances have been achieved through international collaboration insolation-linked warming during a Pleistocene interglacial (Scherer et al., ice flow and flattening of the ice surface. Recent satellite observations The sudden widespread glaciation of Antarctica near the Eocene- and by synthesizing many unique datasets from weather stations and 2008, Geophysical Research Letters) suggests that significant melt may witness rapid changes in subglacial water volumes. Those subglacial lake Oligocene boundary ~34 Ma (Oi-1) is simulated using a 3-D continental ocean buoys, networks of shallow and deep ice cores, satellites, and also occur under conditions of extreme southern high-latitude summer outbursts discharge excess water through a subglacial drainage system Antarctic terrestrial ice model, driven by stored general circulation model simulations. One key goal has been to understand whether the insolation. underneath the ice sheet. Such processes can eventually lead to an ice model climates representing orbital variations and gradually declining anthropogenic forcing signal that has played a role in the widespread The geological evidence for Pliocene Antarctic Ice Sheet variability is flow speedup downstream of subglacial lake areas. Using a numerical atmospheric CO2. Declining CO2 first leads to the formation of small, warming of the atmosphere and oceans elsewhere on earth is detectable consistent with a new ice-sheet/ice-shelf model that simulates fluctuations higher-order ice sheet model that takes into account the ice flow over highly dynamic ice caps on high Antarctic plateaus. Then a CO2 threshold in the Antarctic, and if so, what the consequences will be. in Antarctic ice volume of up to +7m (above today) equivalent sea level subglacial water bodies in hydrostatic equilibrium with the overlying ice, is crossed and height-mass-balance feedbacks are initiated that quickly

26 27 lead to a continental scale East Antarctic Ice Sheet. The role of tectonic and western Australia will be undertaken in hopes of extending the ABSTRACT: at the ice margin to form the ice-cored moraine. Cosmogenic analysis gateway openings is found to be subsidiary to declining CO2, and the local record of past sea level high stands from the mid Quaternary back The TALos Dome Ice CorE (TALDICE) project retrieved an ice core from reveals near-zero age values on stones emerging on the ice surface and modeled form and timing of the transition agree well with proxy records. to the mid Pliocene. It is our hope that estimates of Pliocene sea level in a peripheral dome of East Antarctica. This international project aimed a range from zero to 40 kyr on the present ice-cored moraine. Relict Apparent model-data discrepancies are discussed concerning ice volume Australia, derived utilizing fundamental principles of geomorphology, at drilling an ice core reaching back in time the past two climatic cycles moraines are draped across the hillside up to a height of 270 m above the at Oi-1, and hysteresis that prevents subsequent ice-sheet retreat despite superposition, and morphostratigraphic succession, will complement (about 250,000 years). Talos Dome (72° 49’ S, 159° 11’ E; 2315 m; 80 kg m- ice margin and ages on the youngest boulders reflect the thinning of the later observed sea-level fluctuations. parallel efforts to constrain ice volume using deep-sea geochemical 2 yr-1; -41°C) is located at about 290 km from the Southern Ocean, 250 ice since the Last Glacial Maximum. However, the moraines also contain In contrast to East Antarctica, the WAIS is much less stable, grounded records—both methods entail significant, yet separate, sources of error. km from the Ross Sea, 275 km from the Mario Zucchelli Station (Terra a mix of boulder ages ranging from a few thousand to ~ 424 kyr. One mostly below sea level and susceptible to runaway grounding-line retreat. A robust estimate of the maximum eustatic sea level during the mid Nova Bay). Backtrajectory analyses suggest that Talos Dome is mainly interpretation is that the moraine has existed at the ice edge for as long, A sediment core record recently recovered beneath the Ross Ice Shelf Pliocene warm period will provide an important target for the GCM influenced by air masses arriving both from the Pacific (Ross Sea) and but that it has migrated up and down the mountain front as ice-sheet indicates many fluctuations on orbital time scales over the last 5 million climate modeling community actively engaged in experiments on this Indian Ocean sectors. In December 2007 the drilling team reached the elevation fluctuated in response to sea-level change. If substantiated (and years (ANDRILL AND-1B, Naish et al., 2009, Nature). Here a combined ice time period. depth of 1619.2 m. A preliminary dating based on an ice flow model and additional detailed work is necessary), this discovery could provide a firm sheet-shelf model with a new treatment of grounding-line fluxes is used an inverse method suggests for the upper 1560 m an age of about 300 fix on changing ice thicknesses with which to constrain ice-sheet models to simulate Antarctic variations over the last 5 million years. We argue Key Words: Mid Pliocene Climate optimum, ice volume and sea level 000 years BP. This near coastal site allows a higher climate resolution study over several glacial cycles. For example, the presence (or absence) of pre- that oceanic melting below ice shelves is an important long-term forcing, estimates for the Holocene compared to the ones obtained from the more inland Last Glacial Maximum erratics with complex exposure histories would controlled mainly by far-field influences that can be correlated with deep- drilling sites. indicate the presence (or absence) of the West Antarctic Ice Sheet during sea-core benthic δ18O records. Model West Antarctic configurations range Paleotemperature reconstructions from Antarctic ice cores rely mainly the last interglacial. The approach could be extended to other parts of between full glacial extents with grounding lines near the continental REF. 3589 on D and 18O records. The main factors controlling the observed Antarctica where cosmogenic dates on moraines have already produced shelf break, intermediate states similar to modern, and brief collapses Direct Measurement & Sampling of Subglacial Lake Ellsworth: distribution of their surface values in Antarctic snow are mainly related intriguing results. There are two interesting wider implications. First, the to isolated ice caps on small West Antarctic islands. Transitions between Multidisciplinary Investigation of Life in Extreme Environments & West to the condensation temperature and the origin of moisture. The ice limited thickening of the Weddell Sea sector of the Antarctic ice sheet these states can be relatively rapid, taking one to several thousand years. Antarctic Ice Sheet History cores have been cut in the cold laboratory of the Alfred Wegener Institut contrasts with the massive changes in the Ross Sea sector and may reflect Several aspects of our simulation agree with the ANDRILL AND-1B record, Authors: Martin Siegert 1, the Lake Ellsworth Consortium 1 at Bremerhaven. 18O measurements have been performed on a the differential glacial overdeepening of the respective embayments. including a long-term trend from more frequently collapsed to more 1. School of GeoSciences, University of Edinburgh, EH9 3JW, UK continuous basis of 100 cm (“bag samples”) and 10 cm (detailed samples) Second, blue-ice moraines indicate the location of long-standing ice-free glaciated states, and brief but dramatic collapses at Marine Isotope Stage (E-mail: [email protected] ) in Italy and France. areas which may have acted as biological refuges throughout Antarctica’s 31 (~1.07 Ma) and other super-interglacials. The full 18O record obtained from the bag samples is presented here, glacial history. Although our forcing parameterizations for the past 5 million years are ABSTRACT: focusing on the last deglaciation and early Holocene. The long term not directly applicable to future change, we examine WAIS retreat from The Lake Ellsworth programme has two fundamental scientific aims: (1) climate variability is in good agreement with other inland deep ice cores Key Words: Blue-Ice Moraines, Glacial History, West Antarctic Ice Sheet, modern conditions caused by simple prescribed increases in sub-ice- to determine whether, and in what form, microbial life exists in Antarctic drilled in East Antarctica, with the exception of trends during interglacial Cosmogenic Isotopes. shelf oceanic melt rates. Various integrations are made over the next few subglacial lakes, and (2) to reveal the post-Pliocene history of the West periods (present and past interglacial). While most of the Holocene record thousand years with 20-km continental resolution, and also with 10-km Antarctic Ice Sheet. To meet these aims, we will undertake the direct shows a good agreement with both EPICA (European Project for Ice resolution on a nested WAIS domain. Drastic WAIS retreat occurs with measurement and sampling of water and sediment within Subglacial Lake Coring in Antarctica) Dome C and Dronning Maud Land ice cores, the lack REF. 3592 oceanic melt magnitudes that are not unreasonable given future regional Ellsworth in West Antarctica. For over a decade, scientists have regarded of an early Holocene optimum at Talos Dome may be linked with changes Formation and Preservation of Long-Term Paleoclimatic and warming projections. In some simulations, all marine WAIS ice melts, subglacial lakes to be extreme yet viable habitats for microbial life. in local ice sheet elevation. This new isotopic record shows similar Paleoenvironmental Records in Antarctic Subglacial Lakes: causing several meters of global sea-level rise on e-folding time scales of Additionally, sedimentary palaeoenvironment records are thought to exist millennial scale climate variability during the last glacial period and the Author: Dr. Slawek Tulaczyk several hundred to ~one thousand years. on the floors of subglacial lakes, which would provide critical insights into deglaciation. Department of Earth and Planetary Sciences, University of California, the glacial history of Antarctica. Of the >150 known subglacial lakes, Lake We measured the methane (CH4) mixing ratio in the Talos Dome ice core Santa Cruz, CA 95064, USA Key Words: Antarctic Cenozoic Ice Sheet Model Ellsworth stands out as an ideal candidate for exploration. Glaciologists in the depth range from 73 (close-off) to 1620 m, at a depth resolution (E-mail: [email protected] ) have shown the lake, beneath 3 km of ice, to be 10 km long, 2.5 km wide ranging from 0.5 to 4 m. Two laboratories (LGGE and Bern) were involved, and 160 m deep, confirming it as an ideal deep-water lake for exploration. using slightly different techniques. The CH4 mixing ratio measured in ABSTRACT: REF. 3583 The deployment of heavy equipment has been shown to be possible at this the TALDICE ice core allows us to define tie points with respect to other Lacustrine records provide the fundamental basis for building Pliomax: Pliocene Maximum Sea Level Project location, based on several deep-field reconnaissance studies. This project ice cores from Greenland and Antarctica, using in particular the rapid understanding of paleoenvironmental and paleoclimatic evolution of Authors: Maureen E. Raymo 1, Paul Hearty 2, Michael O’Leary 3, Robert will build, test and deploy all the equipment necessary to complete the CH4 changes associated with the last termination and the Dansgaard/ non-glaciated continents over timescales ranging from sub-annual to DeConto 4, Marci M. Robinson 5, Harry J. Dowsett 5 experiment in a clean and environmentally responsible manner. Samples Oeschger events. Additional chronological constraints are offered by the millions of years. Such records represent an important spatial supplement 1. Dept. of Earth Sciences, Boston University, Boston, MA. will be analysed and split in field laboratories and at Rothera Station, and isotopic composition of molecular oxygen. to deep-sea and continental-shelf marine sedimentary archives. In 2. Bald Head Island Conservancy and Dept. of Environmental Studies, then distributed to laboratories across the UK. This project, which has The comparison of water isotopic profiles from Talos Dome, EPICA Dome Antarctica, ice cores and ice-marginal geologic records yielded a wealth University of North Carolina, Wilmington, NC. been in a planning stage for four years, will be a benchmark exercise in the C, EPICA Dronning Maud Land and North Greenland Ice Core Project of constraints on climatic and environmental changes that took place on 3. Dept. Environmental and Geographical Sciences, Manchester exploration of Antarctica, and could make profound scientific discoveries ice cores, once put on a common time scale, reveals that during the last this continent, and globally, in the last few million years. Additional data Metropolitan University, Manchester, UK. regarding life in extreme environments and West Antarctic Ice Sheet deglaciation, climatic changes at Talos Dome were essentially in phase sets are needed to extend the temporal and spatial footprints of relevant 4. Dept. of Geosciences, University of Massachusetts-Amherst, Amherst, history. with the Antarctic plateau, and that the bipolar see saw with Greenland observational evidence. MA. temperature is also valid for this new coastal site facing the Ross Sea Sedimentary sequences in Antarctic subglacial lakes will provide a new 5. U.S. Geological Survey, Reston, VA. Key Words: Subglacial Lake Ellsworth, Life in extreme environments, post- sector. archive of paleoenvironmental and paleoclimatic records that may greatly (E-mail: [email protected] ) Pliocene WAIS history improve the existing understanding of Antarctic and global climate Key Words: Ice Core, Antarctica, Water Stable Isotopes, Last Deglaciation, dynamics. Admittedly, Antarctic subglacial lakes are isolated by thick ice ABSTRACT: Holocene from direct atmospheric forcings and inputs (e.g. dust, pollen, etc.), which The mid-Pliocene climate optimum (3.3-2.9 Ma) provides a natural analogue REF. 3602 are often used in reconstructing past climate and environmental changes. and testing ground for global climate models used for prediction of global The Last Deglaciation from a New Coastal East Antarctic Ice Core: However, subglacial lacustrine sedimentation should still be sensitive to warming. However, the results of such model experiments are difficult Taldice REF. 3460 long-term climate changes (over timescales >10kyrs) because subglacial to evaluate in the absence of accurate paleoclimate reconstructions; in Authors: Stenni B. 1, Buiron D. 2, Frezzotti M. 3, Masson-Delmotte V. 4, Can Blue-Ice Moraines Provide a 400-Kyr Insight into West Antarctic Ice- hydrology is fundamentally tied to the geometry, flow rates, and the thermal particular, a critical metric of past climate change is polar ice volume. Chappellaz J. 2, Lemieux B. 2, Selmo E. 5, Delmonte B. 6, Barbante C. 7, Sheet History? state of the ice sheet. These, in turn, are determined by climatic factors, Estimates of mid-Pliocene sea level range from +5m to >+40m (“+” Barnola J.-M. 2, Capron E. 4, Cattani O. 4, Falourd S. 4, Genoni L. 1, Iacumin P. Authors: David Sugden 1, Chris Fogwill 2, Mike Bentley 3, Andy Hein 1 such as mean annual temperatures and accumulation rates. For instance, represents the elevation of sea level relative to present) reflecting a huge 5, Jouzel J. 4, Kipfstuhl S. 8, Landais A. 4, Maggi V. 6, Minster B. 4, Mulvaney 1. School of GeoSciences, University of Edinburgh, Edinburgh EH8 9XP cold and dry climatic periods should result in low basal melting rates and range of uncertainty in the sensitivity of polar ice sheets, including the East R. 9, Narcisi B. 3, Oerter H. 8, Parrenin F. 2, Petit J.-R. 2, Ritz C. 2, Scarchilli C. 2. School of Geography, Archaeology and Earth Resources, University of relatively sluggish inputs of basal meltwater into subglacial lake basins. Antarctic Ice Sheet (EAIS), to a modest global warming. Currently, GCM and 3, Schilt A. 10, Schüpbach S. 10, Severi M. 11, Stocker T. 10, Udisti R. 11 Exeter, Exeter, EX4 4RJ In lacustrine records, these conditions may be then reflected in lowered higher resolution Regional Climate Model simulations over the Antarctic 1. DiSGAM, University of Trieste, Italy. 3. Department of Geography, University of Durham, Durham, DH1 3LE sedimentation rates and reduced maximum sediment grain size because region at increasing levels of atmospheric CO2 (400 ppmv) and with warm 2. LGGE, Grenoble, France (E-mail: [email protected] ) reduced subglacial water fluxes will have lowered sedimentary capacity austral summer orbits fail to produce surface air temperatures capable 3. ENEA, Roma, Italy and competence. During warmer climatic periods, increased basal melting of producing significant surface melt (R. DeConto, unpublished work in 4. IPSL/LSCE, Gif-sur-Yvette, France ABSTRACT: rates should lead to higher sedimentation rates and larger maximum grain progress). From this, one may conclude that: a) Pliocene CO2 or levels of 5. DST, University of Parma, Italy Initial interpretation of cosmogenic isotope analysis data on ice-cored sizes. Even though the ice sheet acts as a low-pass filter for climatic changes, other greenhouse gases may be underestimated; b) the sensitivity of these 6. DISAT, University of Milano Bicocca, Italy blue-ice moraine deposits at Patriot Hills supports the hypothesis that the Milankovitch-scale climate variability has sufficiently long periodicity global climate models to CO2 is far too low (especially over the poles); c) 7. Department of Environmental Sciences, University of Venice Ca’ Foscari, West Antarctic Ice Sheet remained coherent and intact for over 400,000 (>20kyr) to turn out to be a recognizable driver of sedimentary variability in the ice sheet model does not adequately represent some of the important Italy years. More certainly the moraine has existed for at least 40 kyr, i.e. since subglacial lacustrine sequences accumulating over time periods covering underlying physics (sub-glacial hydrology for example); d) most sea level 8. AWI, Bremerhaven, Germany before the Last Glacial Maximum. Strong winds sweep over the Patriot hundreds of thousands to millions of years. This would enable application of estimates for this time period, including the +25 m average cited by many 9. BAS, UK Hills causing accelerated ablation at the hill front. In compensation, ice well-established orbital tuning techniques to develop detailed timescales investigators, are too high; or e) some combination of the above. 10. Climate and Environmental Physics, University of Bern, Switzerland flows towards the hills and compressive flow at the margin brings a folded for subglacial lacustrine sequences. As in non-glaciated lake basins, cyclic It is the aim of the PLIOMAX project to reduce the level of uncertainty in 11. Department of Chemistry, University of Florence, Italy debris band, dipping at angles of 70-800, to the ice surface. Subglacially- climate forcings are likely to be convolved in subglacial lake settings with Pliocene ice volume estimates. In July 2009 a field program in southern (E-mail: [email protected] ) derived stones emerge at the surface and ablation then concentrates them local and regional factors that have to do with changes in interconnectivity

28 29 of subglacial conduits, internal ice sheet dynamics, volcanic/geothermal may have contributed to significant elevation changes since the Eocene. experiments (DeConto and Pollard 2003; DeConto et al., 2008) point to the and glacial isostatic adjustment in this sector of the Antarctic plate. Natural events, or subglacial erosion and sedimentation. The clearest example is the sampling of ~26-Ma Oligocene shallow-marine growth of large Antarctic ice sheets during the earliest Oligocene having been faults of inferred Oligocene age in Cape Roberts Project drill core document The value of Antarctic subglacial lacustrine records will be greatly sediments slightly above Paleozoic basement in DSDP Site 270 at a depth accompanied by global cooling and development of small high mountain a dominant NNE maximum horizontal stress. At the same locality, drilling- enhanced if such records contain transition/s from/to pre-glacial to/from of about 1 km below present sea level. valley glaciers on Greenland (but not major northern hemisphere glaciation). induced tensile fractures in core, and tensile fractures and breakouts in subglacial conditions. This would constrain the changes in lateral extent We present a model for 34-Ma paleotopography that, in addition to accounting A different sequence of events to those reconstructed from ODP Site 1218 borehole walls, document a contemporary N15-20W maximum horizontal of the Antarctic ice sheet through time and provide key insights into the for the load of the modern ice, also accounts for thermal contraction that has been suggested on the basis of a shelf section record from a quarry in stress direction. Neogene volcanic cone alignments document a Pleistocene nature of Antarctic subaerial Late Cenozoic landscapes when they were results from tectonic extension and for sediment redistribution and loading Alabama (Katz et al., 2008). Here we report new records recently obtained maximum horizontal stress direction of N28E. Neogene – Recent stress data not ice covered. Preservation of unlithified lacustrine sediments during since 34 Ma. With support from plate-motion data, geologic observations, from a depth transect of sites in the equatorial Pacific (IODP Expedition from natural and drilling-induced fractures were recently acquired by the glacial advances and retreats may be difficult. However, some of the and limited crustal-thickness data, we assume that the West Antarctic Rift 320/321) in an effort to improve our understanding of this important interval ANDRILL project. Integrating these data sets provides a regional picture of the subglacial lake basins may be deep enough to have sheltered relatively was an orogenic highland in the Early Cretaceous, with a crustal thickness in Earth history. evolving stress field from Oligocene to present in the western Ross Sea. undisturbed lacustrine sequences spanning glacial/deglacial transitions. of about 50 km. Three phases of extension transformed this highland to the In the eastern sector of the rift, there has been no drilling of rift successions There are known examples of Northern Hemisphere lake basins, in which present lowlands and basins. The first, at roughly 100-80 Ma, affected the REFERENCES: to derive stress data from fracture patterns. In the Marie Byrd Land area of overriding ice sheet did not obliterate pre-glacial sedimentary sequences. western and southern margins of Marie Byrd Land and the adjacent Eastern Coxall HC Wilson PA Palike H Backman J Lear CH (2005) Rapid stepwise onset the eastern rift system, however, we have used the orientations and ages of Even with relatively sparse observational constraints that exist at present, Basin. The second occurred about 65-55 Ma, as suggested Cande and Stock of Antarctic glaciation and deeper calcite compensation in the Pacific Ocean: polygenetic volcano chains, elongate volcano edifices, and elongate summit we know that at least one Antarctic subglacial lake basin is close to 1km [2004], affecting the central Ross Embayment, including Iselin Bank, Central Nature 433, 53-57. calderas to determine stress directions during volcanism. The main volcanism deep (Lake Vostok, 4th deepest lake basin in the world). Future targeted High, and possibly reaching as far as Siple Dome. The third, synchronous DeConto RM & Pollard D (2003) Rapid Cenozoic glaciation of Antarctica was coeval with glaciation since ~14 Ma, the time commonly cited as the geophysical studies may reveal even deeper lake basins, increasing the with spreading at Adare Trough about 45-25 Ma, primarily affected basins induced by declining atmospheric CO2. Nature 421, 245-249. inception of significant ice volumes in West Antarctica. In Marie Byrd Land, likelihood of long-term sediment preservation. adjacent to the Transantarctic Mountains. Stretching factors are everywhere DeConto RM, Pollard D, Wilson PA, Pälike H, Lear CH & Pagani M (2008) Middle-Late Miocene volcanism occurred primarily along ~north-south Subglacial lacustrine sequences may provide unprecedented insights at least 2.0, and higher in sedimentary basins. 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Total corrections restore most of West Antarctica to growth across the Eocene-Oligocene transition: Geology 36, 251-354. west stress field rotation coincides with increased Pacific-Antarctic spreading Authors: Roderik van de Wal1, Richard Bintanja2, Bas de Boer1 and Luc above modern sea level at 34 Ma, increasing total Antarctic land area above Liu Z Pagani M Zinniker D DeConto RM Huber M Brinkhuis H Shah SR Leckie rate and tectonic events around the Pacific basin associated with a major Lourens3 modern sea level by 10–20%. RM Pearson A (2009) Global cooling during the Eocene-Oligocene transition: plate reorganization. The Neogene deformation record in sedimentary basins 1. Institute for Marine and Atmospheric Research Utrecht, Utrecht A 3-D Antarctic ice sheet-shelf model will be used to simulate the effects Science 323, 1187-1190. along the southeast Australia passive margin is marked by contractional University, Princetonplein 5, 3584 CC Utrecht, The Netherlands. of the new paleotopography on the initial major ice growth at the E-O Merico A Tyrrell T Wilson PA (2008) Eocene/Oligocene ocean de-acidification deformation along reactivated structures and unconformities, attributed to 2. Royal Netherlands Meteorological Institute (KNMI), Wilhelminalaan 10, boundary. The higher West Antarctic topography would have supported linked to Antarctic glaciation by sea level fall: Nature, 452, 979-982. the same plate reorganization in the Pacific basin. The stress field change in 3732 GK De Bilt, The Netherlands. a greater volume of initial ice, potentially reducing the mismatch Palike H Norris RD Herrle J Wilson PA Coxall HC Lear CH Shackleton NJ Wade Marie Byrd Land could mark a previously unrecognized, widespread event 3. Department of Earth Sciences, Faculty of Geosciences, Utrecht between observed and modeled ice volumes across the E-O transition. BS Tripati AK (2006) The heartbeat of the Oligocene climate system: Science in Antarctica. If correct, this change could be recorded by unconformities, faulting, and volcanic alignments within Antarctica’s sedimentary basins, University, Budapestlaan 4, 3584 CD Utrecht, Netherlands Model sensitivity tests will also address effects on subsequent ice sheet 314, 1894-1898. including the basins within the western Ross Sea. (E-mail: [email protected] ) evolution, such as hysteresis that prevents partial retreats in models Key Words: stress, West Antarctic Rift, drill core, fractures, volcanic despite observed eustatic sea level fluctuations during the Oligocene and Key Words: Eocene/Oligocene, Equatorial Pacific, Glacial history, Ocean alignments ABSTRACT: Miocene. Acidification Until recently d18O records of ice cores and d18O records from marine cores are interpreted separately, ice core records in terms of temperature Key Words: Eocene, Oligocene, Paleotopography, West Antarctica. REF. 3570 and marine cores in terms of temperature and ice volume. However, the REF. 3567 An Evolving Perspective on the Features and Forcing of the Hothouse to total amount of d18O in ice and ocean together is constant over time. Neogene geodynamic evolution of the West Antarctic Rift from drill core Icehouse Transition This notion can be used to separate the marine record consistently in a REF. 3601 and volcanic alignment studies Author: James Zachos temperature record and ice volume record by considering the isotope New Records of the Eocene/Oligocene Transition from the IODP Pacific Authors: Timothy Paulsen 1, Terry Wilson 2, Richard Jarrard 3, ANDRILL MIS- Earth and Planetary Sciences Dept., UCSC, Santa Cruz, CA 95064. as a passive tracer in the ice sheet. Here we will show the importance Equatorial Age Transect (PEAT): a Test of Competing Stratigraphic Science Team 4, ANDRILL SMS-Science Team 5 (E-mail: [email protected] ) of this work for the transient nature of slow climate changes during Interpretations of Antarctic Glaciation and Ocean De-Acidification 1. Department of Geology, University of Wisconsin-Oshkosh, WI 54901, USA the Mid-Pleistocene Transition. It is shown that, if there are ice sheets Authors: Paul A. Wilson 1, Heiko Palike 1, Hiroshi Nishi 1, Mitch Lyle 1, 2. School of Earth Sciences, Ohio State University, Columbus, OH 43210, USA ABSTRACT: involved, the non-linearity of the climate system is large in terms of CO2 Isabella Raffi 1, Kirsty Edgar 1, Shipboard Scientific Party 1 3. Department of Geology and Geophysics, University of Utah, UT 84112, The overall cooling of the Antarctic continent and surrounding oceans over sensitivity or sea level change. We therefore need to explicitly model the 1. IODP Expedition 320/321 USA the early Cenozoic was forced by either a decline in pCO2, or the widening geological observations in a climate model in order to further improve our (E-mail: [email protected]) 4. http://www.andrill.org/support/references/appendixc.html of the circum-Antarctic gateways, or, more likely, some combination of the understanding of the climate system. 5. http://www.andrill.org/projects/sms/team.html two. Key to resolving the relative contributions of these two forcing factors ABSTRACT: (email [email protected]) to this particular climatic transition is the accurate reconstruction of two Key Words: Marine record, Temperature record and Ice volume The most pronounced perturbation in published records of the calcite quantities of the climate system, the equator-to-pole temperature gradients, compensation depth for the past ~150 Myr is a ~1 km deepening thought ABSTRACT: and mass of ice-sheets, preferably on Antarctica. Until recently, much of our to have occurred somewhere near the Eocene/Oligocene (E/O) boundary The West Antarctic rift system transects the Antarctic continent and is the understanding of both climate features was based on estimations from the REF. 3473 (~34 Ma). This interval also marks the initiation of major Cenozoic ice- only rift system on Earth covered by a continental-scale ice sheet. Antarctic deep-sea oxygen isotope records, a proxy that when used alone has clear Antarctic Paleotopography Estimates at the Eocene-Oligocene Climate sheets on Antarctica but the relationship between these two events glaciation has temporally and spatially overlapped with rifting and volcanism limitations in accurately quantifying either temperature or ice-volume. In Transition and Their Implications for Ice Sheet Growth remains a subject of debate. High-resolution stable isotope and %CaCO3 since the inception of Antarctic ice sheets ~34 Ma. Understanding the the last decade, however, a number of independent proxies of temperature Authors: Douglas S. Wilson 1, Bruce P. Luyendyk 1, David Pollard 2, Robert records from ODP Leg 199 Site 1218 in the equatorial Pacific Ocean are evolutionary behavior of the Antarctic ice sheets relies on understanding the have been developed and refined, and applied to deep and shallow marine M. DeConto 3 interpreted to indicate that CCD deepening across the E/O transition evolution of the rift system - the basal host for past and present ice sheets. sections. These new records coupled with the increased availability of high- 1. Dept. , University of California, Santa Barbara occurred much faster than previously documented, in two obliquity-paced Little is known, however, about the Neogene – contemporary geodynamic resolution, orbital scale oxygen isotope records, have significantly improved 2. Earth and Environmental Systems Inst., Pennsylvania State University steps and synchronously with the onset of major Cenozoic Antarctic ice- evolution of the rift system. Integration of stress data derived from natural the reconstructions of planetary thermal gradients, as well as estimates 3. Dept. Geosciences, University of Massachusetts, Amherst sheets (Coxall et al., 2005). CCD deepening has been interpreted (Merico and induced fractures from ANDRILL and Cape Roberts drill cores, as well of the timing and mass of ice-volume. Here I discuss the relative merits of (E-mail: [email protected]) et al., 2008) to reflect a shelf-to-basin shift in global CaCO3 deposition volcanic alignment studies from marginal and continental areas, is beginning these integrated approaches, and review several of the key findings and caused by glacioeustatic sea level fall. Rapid step-wise Antarctic glaciation to define a picture of the past and present stress patterns associated with their implications for the relative roles of greenhouse gases and gateways in ABSTRACT: was probably achieved by positive feedback effects on ice-growth rifting and coeval glacial cycles. driving these changes. Paleoclimate models for the rapid growth of Antarctic ice near the during an interval of minimum eccentricity and low amplitude obliquity, In the western sector of the rift in the Ross Sea, neotectonic deformation is The patterns of change, both long and short-term indicate that bothpCO2 Eocene-Oligocene (E-O) boundary have advanced substantially in recent inhibiting warm summers (Coxall et al., 2005, Palike et al., 2006)¬– perhaps demonstrated by faults cutting strata of Miocene-Pliocene, and possibly and gateways played a role in driving years. However, one generally recognized limitation of these models is a ‘threshold’ response to slowly declining atmospheric CO2 levels through the younger age, along the Terror Rift. Faults and associated veins intersected The evolution of Cenozoic climate has been largely pieced together with that they are based on present topography, corrected only for removal of Cenozoic (DeConto and Pollard 2003). The magnitude of oxygen isotope in the ANDRILL AND-1B drill core cut Pleistocene strata, suggesting that evidence collected from marine cores. This includes the evidence for the modern ice. For West Antarctica this results in large areas below sea level increase observed across the transition (Coxall et al., 2005), improvements in deformation may be recent or perhaps ongoing. Stress data have been initial appearance of Antarctic ice-sheets in the late Eocene. that would not host ice. In the Ross Embayment, part of the recently active E/O palaeorecords from elsewhere (Eldrett et al., 2007; 2009; Lear et al., 2008; acquired across a significant portion of the western rift, allowing us to West Antarctic rift system, there are reasons to suspect that other factors Liu et al., 2009) and the results of coupled global climate-ice sheet model assess the Oligocene to contemporary stress regime associated with rifting Key Words: Hothouse to Icehouse, Marine cores, CO2, Gateways

30 31 2. List of Solicited Abstracts REF. 3518 REF. 3585 3. List of Contributed Abstracts Fitzgerald, Paul Huber, Matthew Formation of the Transantarctic Mountains and West Antarctic Rift System Connecting the Tropics and the Poles with Heat Transport and Oral REF. 3182 from Collapse of the West Antarctic Plateau: Thermochronologic and Teleconnections Geologic Constraints Tuesday 8th, 4.20pm. Auditorio. Mackintosh, Andrew REF. 3089 Last Major Retreat of Antarctic Ice Sheets Forced by Sea Level Rise and Tuesday 8th, 10.20am. Auditorio. REF. 3586 Larter, Robert Ocean Warming Things We Don’t Know About the West Antarctic Ice Sheet at the Last Friday 11th, 9.40am. Auditorio. REF. 3533 Huybers, Peter Francis, Jane Antarctic Orbital Variations - All the Usual Suspects Glacial Maximum Friday 11th, 10.00am. Auditorio. REF. 3191 Cenozoic Climate Change in Antarctica from Fossil Plants Monday 7th, 12.10pm. Auditorio. Thursday 10th, 10.00am. Auditorio. Gohl, Karsten REF. 3113 Tectonic Architecture of the Amundsen Sea Embayment, West Antarctica: REF. 3587 REF. 3540 Martinson, Douglas G. Borchers, Andreas Basic Constraints for Ice-Sheet Dynamics Holocene History of Water Convection and Ice-Rafting in the Burton Tuesday 8th, 12.30pm. Auditorio. Marchant, David Ocean Heat along the West Antarctic Margin: Source, Delivery and The Glacial and Climate Record of the Dry Valleys, Southern Victoria Land History Basin, Mac.Robertson Shelf, and its Implications on the Distribution Monday 7th, 4.00pm. Auditorio. Tuesday 8th, 4.40pm. Auditorio. of Ice Masses and Bottom-Water Production in This Region REF. 3337 Thursday 10th, 9.40am. Auditorio. Pollard, David Some Aspects of Antarctic Ice Sheet Evolution from the Eocene to the REF. 3544 REF. 3588 Bart, Phil Monaghan, Andrew REF. 3135 Future Sangiorgi, Francesca Monday 7th, 11.50am. Auditorio. An Overview of Antarctic Geophysical Records Climate Variability and Change in Antarctica during the Past Century Tuesday 8th, 9.20am. Auditorio. Monday 7th, 11.30am. Auditorio. Neogene Sea Surface Temperature Reconstructions from the Southern McMurdo Sound and the McMurdo Ice-Shelf (ANDRILL REF. 3345 REF. 3554 REF. 3589 Program, Antarctica) Luyendyk, Bruce Thursday 10th, 3.40pm. Auditorio. Proposed Shallow Drilling Program (Shaldril) in Eastern Ross Sea: Evidence Pagani, Mark Siegert, Martin The Role of Carbon Dioxide during the Onset of Antarctic Glaciation Direct Measurement & Sampling of Subglacial Lake Ellsworth: for Oligocene West Antarctic Ice Sheet REF. 3154 Tuesday 8th, 9.40am. Auditorio. Thursday 10th, 12.30pm. Auditorio. Multidisciplinary Investigation of Life in Extreme Environments & West Antarctic Ice Sheet History Schroeder, Dustin REF. 3555 Tuesday 8th, 2.40pm. Auditorio. Improved Characterization of Subglacial Hydrology Using Multiple REF. 3372 Radar Focusing Windows: Examples from Thwaites and Totten Brinkhuis, Henk Brigham-Grette, Julie Arctic Stratigraphic Candidates and Events for Comparison with the REF. 3590 Glaciers, Antarctica The Onset of Antarctic Glaciation and the Eocene-Oligocene Transition, Friday 11th, 12.30pm. Auditorio. Cooling, Sea Level or Both? Antarctic Past Van de Wal, Roderik Thursday 10th, 10.40am. Auditorio. Monday 7th, 3.20pm. Auditorio. The Deconvolution of Ice Volume and Marine Benthic Records and the Need of REF. 3156 Hillenbrand, Claus-Dieter REF. 3444 REF. 3561 Transient Climate Simulations on Geological Time Scales Dunbar, Robert Monday 7th, 10.40am. Auditorio. Marine Sedimentary Record and Timing of Ice-Sheet Advance and Anderson, John Retreat in the Southern Bellingshausen Sea, West Antarctica, During Diachronous Climate Change in the Antarctic Peninsula Region: Results Pliocene-Recent Orbital and Sub-Orbital Variability within the Polar Antarctic Zone of the Southern Ocean: the Biogeochemistry of Diatom- REF. 3592 the Last Glacial Period from Shaldril and Other Long Coring Efforts Friday 11th, 10.40am. Auditorio. Thursday 10th, 2.40pm. Auditorio. Bearing Sediments Tulacyzk, Slawek Thursday 10th, 9.00am. Auditorio. Formation and Preservation of Long - Term Paleoclimatic and REF. 3349 REF. 3460 Paleoenvironmental Records in Antarctic Subglacial Lakes REF. 3567 Tuesday 8th, 3.00pm. Auditorio. Vaughan, Alan P.M. Sugden, David Late Cretaceous to Palaeogene Climate Evolution, Antarctic Peninsula: Can Blue-Ice Moraines Provide a 400-Kyr Insight into West Antarctic Ice- Wilson, Terry J. Neogene Geodynamic Evolution of the West Antarctic Rift from Drill Core REF. 3594 Seymour Island/Marambio Drilling Project (SIMDP) Sheet History? Thursday 10th, 10.20am. Auditorio. Friday 11th, 9.00am. Auditorio. and Volcanic Alignment Studies Hindmarsh, Richard C.A. Tuesday 10th, 10.00am. Auditorio. Palaeo-Accumulation Rates in East Antarctica Deduced from the SPRI REF. 3363 REF. 3473 Lines REF. 3570 Friday 11th, 12.10pm. Auditorio. Kowalewski, Douglas Wilson, Douglas Resolving the Off-Shore And On-Shore Pliocene Climate Record for Antarctic Paleotopography Estimates at the Eocene-Oligocene Climate Zachos, James An Evolving Perspective on the Features and Forcing of the Hothouse to REF. 3598 the Ross Sea Embayment, Antarctica: Implications for the Stability of Transition and their Implications for Ice Sheet Growth the Antarctic Ice Sheets Tuesday 8th, 12.10pm. Auditorio. Icehouse Transition Barrett, Peter Monday 7th, 10.00am. Auditorio. ANTscape: Antarctic Paleotopographic Maps for the Last 100 Million Monday 7th, 4.20pm. Auditorio. Years REF. 3478 REF. 3468 Jamieson, Stewart REF. 3575 Tuesday 8th, 11.50am. Auditorio. Pattyn, Frank Maldonado, Andres Predicting the Subglacial Landscape Evolution of Antarctica Early Opening of Drake Passage (Antarctica): New Evidences from Tuesday 8th, 12.50pm. Auditorio. Modelling Subglacial Lakes and Their Influence on Antarctic Ice Sheet REF. 3600 Dynamics Barrett, Peter Deep Basins in the Southwestern Scotia Sea Tuesday 8th, 3.40pm. Auditorio. REF. 3490 Tuesday 8th, 3.20pm. Auditorio. ACE Contribution to the Intergovernmental Panel on Climate Change Fifth Naish, Tim Assessment Report REF. 3577 Friday 11th, 2.40pm. Auditorio. REF. 3471 Orbital Influences on the Pliocene Antarctic Ice Sheets Smellie, John Monday 7th, 2.40pm. Auditorio. Galeotti, Simone Orbitally Paced Sedimentary Record across the Eocene/Oligocene REF. 3601 Seven Million Year History of the Antarctic Peninsula Ice Sheet Boundary Glaciation in the Western Antarctic Margin Wilson, Paul A. Revealed by Coupled Geological and Climate Modelling Studies REF. 3496 Tuesday 8th, 9.00am. Auditorio. Pekar, Stephen Thursday 10th, 12.10pm. Auditorio. New Records of the Eocene / Oligocene Transition from the IODP Pacific Estimating Eustasy and Ice Volume from Backstripped Low-Latitude Equatorial Age Transect (PEAT): A Test of the Competing Stratigraphic REF. 3578 Interpretations of Antarctic Glaciation and Ocean De-Acidification REF. 3476 Stratigraphy Villa, Giuliana Monday 7th, 10.20am. Auditorio. Bell, Robin Thursday 10th, 11.30am. Auditorio. Peering Beneath the Ice Sheet: AGAP Evidence for a More Dynamic East Paleoclimate Variability Inferred From a Middle Eocene - Early Oligocene Sequence at Odp Site 738, Kerguelen Plateau: a Comparison REF. 3517 Antarctica REF. 3602 Tuesday 8th, 10.40am. Auditorio. Stenni, B. of Biotic, Stable Isotope, and Paleomagnetic Proxies Ashworh, Allan Thursday 10th, 11.50am. Auditorio. Antarctic Tundra Biome The Last Deglaciation from a New Coastal East Antarctic Ice Core: Taldice Thursday 10th, 10.00 pm. Auditorio. REF. 3583 Friday 11th, 11.50am. Auditorio. Raymo, Maureen E. REF. 3488 Pliomax: Pliocene Maximum Sea Level Project Passchier, Sandra Monday 7th, 12.50pm. Auditorio. Miocene through Pleistocene Glacial Facies Distribution in And-2a, Antarctica, and Paleoclimatic Implications Thursday 10th, 3.20pm. Auditorio.

32 33 REF. 3491 Poster REF. 3361 REF. 3443 Mckay, Robert Contreras Gutiérrez, Paulina Karem Anderson, John Did Antarctic Cooling ~3.3 Million Years Ago Drive Northern REF. 3097 The Determination of Persistent Organic Pollutants in Antarctic Seismic Stratigraphic Record of Climate and Ice Sheet Evolution in the Hemisphere Glaciations? Tuo, Shouting Freshwaters at Trace Levels Northeastern Antarctic Peninsula Region with Shaldril Age Constraints Monday 7th, 3.00pm. Auditorio. High Resolution Stable Isotope and Carbonate Variabillity during the Eocene- Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Oligocene Climate Transition, The Walvis Ridge Transect, South Atlantic REF. 3494 Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. REF. 3362 REF. 3469 Barbeau, Jr., David L. Contreras Gutiérrez, Paulina Karem Hunter, Morag Sediment Provenance and Thermochronology of the Margins of REF. 3114 Study of the Distribution at Trace Level Metals in Freshwater Samples Thining of the Antarctic Peninsula Ice Sheet and Deglaciation of Marguerite Drake Passage Borchers, Andreas Obtained of Latitudinal and Longitudinal Sampler in Antarctic Zone (52- Bay 65ºS; 70-58ºW) Tuesday, 8th, 4.00pm. Auditorio. From Prydz Bay Shelf to the Deep Sea - Insights into 1.3 Ma History of Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Bottom-Water Formation and Ice-Rafting Inferred from Sediment Cores REF. 3499 Recovered in the Prydz Bay Region REF. 3470 REF. 3364 Escutia Dotti, Carlota Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Talarico, Franco Circum-Antarctic Warming Events between 3.4 And 4 Ma Recorded In Suganuma, Yusuke Ice Dynamic Variations and an Oligocene Exhumation Episode Revealed by Refining for Integration between Paleomagnetic Records in Marine Sediments from Prydz Bay (ODP Leg 188) and the Antarctic Peninsula (ODP REF. 3143 Provenance and Detrital Thermochronology Studies in the Late Cenozoic Leg 178) Sediments and 10be Fluxes in Ice Cores Glacimarine Sediments Recovered by the ANDRILL and-2/2a Drillcore Weber, Michael Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Thursday 10th, 4.20pm. Auditorio. Annually-Laminated Marine Sediment Northeast of Crary Fan: Potential Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone.

for High-Resolution and Long-Term (Quaternary-Pliocene) Reconstruction REF. 3374 REF. 3502 REF. 3472 of Glacial History Carr, Stephanie Bentley, Michael Cristini, Luisa Thursday 10th 5.30–6.30 p.m. and Friday 11th, 4.30–5.30 p.m. Poster Zone. Characterization of the Ross Sea Sedimentary Bacterial and Archaebacterial What Do We Know About the West Antarctic Ice Sheet at the Last Glacial Driving the Cenozoic Antarctic glaciation: Role of Atmospheric CO2 and Communities by Structural and Isotopic Analyses of Phospholipids Maximum, and its Deglacial History? Uninterrupted Circumpolar Current REF. 3144 Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Friday 11th, 10.20am. Auditorio. Wobbe, Florian Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Plate-Tectonic History of the Southern Ocean – Continental Deformation REF. 3377 REF. 3504 of Antarctica Mawbey, Elaine REF. 3474 Wilson, Gary Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Trace Metal Proxy Records across the Eocene/Oligocene Boundary from Koss, Howard Neogene Tectonic and Climatic Evolution of the Western Ross Sea – ODP Leg 199 Developing a High-Resolution Sequence Stratigraphic Framework for Chronology of Events from the And-1b Drillhole REF. 3145 Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Upper Lower Miocene Strata (~18-16 Ma) from the ANDRILL and-2a Thursday 10th, 3.00pm. Auditorio. Lindeque, Ansa Drillcore, Southern McMurdo Sound Project, Antarctica Stratigraphy of the Pacific Margin of West Antarctica: A Contribution to the REF. 3389 Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. REF. 3513 Casp Project Kuhn, Gerhard Warny, Sophie Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Provenance Analysis of Ross Embayment Basin Deposits as Evidence for REF. 3475 A Mid Miocene Thermal Maximum? Evidence from Palynomorphs Recovered Ice Sheet Variations in Antarctica Levy, Richard From And-2a, Southern Mcmurdo Sound, Antarctica REF. 3183 Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Re-Evaluation and Update of Diatom Biostratigraphy for the Oligocene- Thursday 10th, 4.00pm. Auditorio. Weigelt, Estella Miocene Sections of Deep Sea Drilling Project Cores in the Ross Sea. Neogene Ice Sheet Cyclicity in the Western Amundsen Sea Embayment REF. 3390 Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. REF. 3522 – Evidence from Seismic Records Loic, Barbara Hodgson, Dominic Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Deglacial Environments in Eastern Prydz Bay, East Antarctica REF. 3477 A Geological Constraint on Relative Sea Level in Marine Isotope Stage 3 in the Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Pañczyk, Magdalena Larsemann Hills, Lambert Glacier Region, East Antarctica (31 366 - 33 228 Cal REF. 3219 First Cenozoic Glaciers in West Antarctica - Paleomagnetic and Isotope Yr Bp) Van de Flierdt, Tina REF. 3399 Age Constraints Friday 11th, 9.20am. Auditorio. Evidence for Iceberg Armadas from East Antarctica in the Southern Ocean Varova, Liudmila Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. during the Late Miocene and Early Pliocene Seismic Stratigraphy and Cenozoic Depositional Environment along the REF. 3530 Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Wilkes Land Margin Seismic Stratigraphy and Cenozoic Depositional REF. 3479 Young, Duncan Environment along the Wilkes Land Margin Maffioli, Paola Unveiling the Aurora Subglacial Basin, Antarctica: Initial Findings of the First REF. 3231 Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Late-Pliocene Laminated Diatomaceous Sediments from Core and- Season of ICECAP Vogel, Stefan W. 1b, Ross Sea (Antarctica): Floral Composition and Paleoenvironmental Tuesday 8th, 11.30am. Auditorio. The ANDRILL-Mis Carbonate Record - Pliocene-Pleistocene Record of REF. 3406 Implications Glacial Interglacial Cyclicity in the McMurdo Sound Dolan, Aisling Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. REF. 3543 Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. The Sensitivity of Mid-Pliocene Ice Sheets to Orbital Cycles of the Earth Moy, Christopher Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. REF. 3481 A Geochemical Record of Holocene Variations in the Southern Hemisphere REF. 3343 Sunwall, David REF. 3422 Westerly Wind Field Luyendyk, Bruce Initial Results from an Over-Sea-Ice Seismic Reflection Survey Offshore Bijl, Peter K. Friday 11th, 11.30am. Auditorio. ANDRILL Targets a Paleogene Section on Coulman High, Ross Sea, New Harbor, Antarctica Palaeogene Sea Surface Temperature Evolution of the Southwest Pacific; Antarctica to Recover History of the West Antarctic Ice Sheet Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Cooling the Greenhouse REF. 3559 Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Crosta, Xavier Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. REF. 3482 Holocene Productivity Changes Off Adélie Land (East Antarctica) Williams, Brian REF. 3346 REF. 3423 Thursday, 10th, 9.20am. Auditorio. Recent Mackay Sea Valley Sediments Imaged by Over-Sea-Ice Seismic Henrys, Stuart Bijl, Peter K. Reflection Surveying, Southern McMurdo Sound, Antarctica Rossmap; Regional Seismic Stratigraphic Correlations in the Victoria Land Temperature and Surface-Water Circulation Constraints on Dinoflagellate REF. 3560 Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Basin Endemism in the Paleogene Southern Ocean Lewis, Adam Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Early Miocene Terrestrial Evidence for Cyclical Glaciation and the Cutting REF. 3483 of Deep Glacial Troughs from Upper Taylor Valley and the Friis Hills in the Wellner, Julia REF. 3348 REF. 3425 McMurdo Dry Valleys Sorlien, Christopher Gregory, Thomas Sedimentologic Record of the Evolving Ice Sheet as Recorded in Shaldril Monday 7th, 4.40pm. Auditorio. Rossmap Regional Seismic Stratigraphic Correlations in Central and Holocene El Niño-Southern Oscillation and Sea Ice Variability in Adélie Cores from the Northwestern Weddell Sea, Antarctica Eastern Ross Sea: Controls for Early Tertiary Climate History Land, East Antarctica Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. REF. 3581 Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. DeConto, Rob REF. 3485 Climate Forcing Of Antarctic Ice Sheet Variability on Glacial-Interglacial REF. 3356 REF. 3429 Phillips, Glen Timescales Nitsche, Frank O. Leitchenkov, German Influence of Bedrock Architecture on Modern Day Topography, Lambert Monday 7th, 12.30pm. Auditorio. Comparing Present and Paleo Ice Flow in the Amundsen Sea, West Seismic Stratigraphy of the East Antarctic Margin: A Record of Cenozoic Glacier Region: Implications for Landscape and Climate Evolution Models Antarctica Environmental Changes and Paleoclimate Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone.

34 35 REF. 3486 REF. 3508 REF. 3524 REF. 3539 Rodríguez-Sanz, Laura Hideki, Miura Hernández Molina, Francisco Javier Winter, Diane Reconstructing Thermal Gradients of the Upper Southern Ocean (ODP Site Geological and Geomorphological Evidence for the Mid-Holocene A Middle Miocene Discontinuity in the Scotia and Weddell Seas (Antarctica): Antarctic Mid-Pliocene Warmth Expressed in Proximal-Marine Diatom 1090) from MG/CA Ratios in Planktonic Foraminifera and UK37 during the Environmental Changes and East Antarctic Ice Sheet Fluctuation Tectonic, Sedimentary, Climatic & Paleoceanographic Implications Assemblages Pleistocene Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. REF. 3509 REF. 3525 REF. 3541 REF. 3487 Smith, James Hodgson, Dominic Houben, Alexander Okuno, Junichi Deglaciation of the Wais in the Western Amundsen Sea Lake High Stands in the Pensacola and Shackleton Mountains Antarctica, Cooling Steps Associated with the Eocene-Oligocene Transition; Results Quaternary Melting History of Antarctic Ice Sheet Derived Form Glacial Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. 4500-2300 YR BP from Southern Atlantic Ocean DSDP Sites 511 & 512 Isostatic Adjustment Modelling Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. REF. 3510 Pike, Jennifer REF. 3526 REF. 3542 REF. 3489 Deglaciation and Holocene Evolution of the Antarctic Peninsula; Hernández Molina, Francisco Javier Sjunneskog, Charlote Falk, Candice Asynchronous Trends Revealed through Fossil Diatom Assemblages The Scan Basin: Sedimentary Drifts Evolution in a Deep Gateway between Biostratigraphic and Seismic Stratigraphic Charcterization of an Upper Paleoenvironment and Paleoclimate of Coastal East Antarctica during the Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. the Weddell and Scotia Seas (Antarctica) Pliocene-Pleistocene Sediment Section in North Basin, Ross Sea, Middle Miocene: Particle Size Results of the ANDRILL Southern McMurdo Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Antarctica Sound Project REF. 3511 Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Persico, Davide REF. 3527 Revised Eocene - Oligocene Calcareous Nannofossil Biozonation for the Hernández Molina, Francisco Javier REF. 3545 REF. 3492 Southern Ocean Seismic Stratigraphy of Protector Basin (Southern Scotia Sea, Antarctica) Warnock, Jonathan Pekar, Stephen Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Refining Marine Diatom Paleoproductivity Estimates for the Southern Using New Tools to Explore Undiscovered Country: Understanding the Ocean Stratigraphic and Tectonic History of Greenhouse to Icehouse Worlds of REF. 3512 REF. 3528 Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Offshore New Harbor, Western Ross Sea, Antarctica Pekar, Stephen González, Javier Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. The Evolution of the Antarctic Ice Sheet during the Cenozoic: When Did High-Resolution Records in FE-MN Crusts from the Scotia Sea (Antarctica): REF. 3546 the Icehouse Cometh? Paleoceanographic and Paleoclimatic Implications Galindo-Zaldivar, Jesús REF. 3493 Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Stress, Paleostress and Recent Tectonic Evolution of the Northern Antarctic Mckay, Robert Peninsula, South Shetland Islands and Bransfield Strait The Stratigraphic Signature of the Late Cenozoic West Antarctic Ice Sheet REF. 3514 REF. 3529 Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Warny, Sophie Williams, Trevor Palynological Evaluation of the Antarctic 2006 Shaldril Campaign off the Using an Iceberg Drift Model to Assess Provenance of Ice-Rafted Debris REF. 3547 REF. 3497 Coast of the Antarctic Peninsula around East Antarctica Riesselman, Christina Katsuki, Kota Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Geochemical and Diatom Assemblage Constraints on Late Pliocene Climate Shift and Oscillation of Holocene on the Conrad Rise in the Indian Primary Production, Mcmurdo Sound, Antarctica Sector of the Southern Ocean REF. 3515 REF. 3531 Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Pekar, Stephen Spector, Perry Estimating Bottom Water Temperatures and Ice Volume Using Stable Cenozoic Paleotopographic Reconstruction of Marie Byrd Land and REF. 3548 REF. 3498 Isotope and MG/CA Records from Deep-Sea Sites: Potential Problems and Thurston Island, with Focus on Miocene and Pliocene Geologic Evidence Galindo-Zaldivar, Jesús Yamane, Masako Pit Falls Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Tectonic Evolution of Main Gateways in Southern Scotia Sea: Implications East Antarctic Ice Sheet Fluctuations and Global Climate Changes during the Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. in the Antarctic Circulation Model Last 5 MYR REF. 3532 Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. REF. 3516 Spector, Perry González, Jhon Jairo Tectonic Configuration of West Antarctica: Structural Controls on REF. 3549 REF. 3500 Stratigraphic Evolution of Glacial Sequences on the Eastern Wilkes Land Paleogeography and Geological Parameters of Consequence for Pierce, Elizabeth Rocha, Maria Margin Paleotopographic Reconstructions 40ar/39ar Thermochronology of Australia’s Conjugate Margin in Antarctica Era-Interim (1989-2007) Forced H-Tessel Scheme for Modeling Ground Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. From Ice-Rafted Hornblende, Biotite and Feldspar Grains Temperatures for Livingston Island (South Shetlenads, Antarctic Peninsula). Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. REF. 3519 REF. 3534 Álvarez-Valero, Antonio M. Tatur, Andrzej REF. 3550 REF. 3501 Tracing the Pathways of Ice-Rafted Medium/High-Grade Metamorphic Lithostratigraphy, Dating and Correlation of Cenozoic Glacial and Galindo-Zaldivar, Jesús Hoffmann, Stefan Rocks within West Antarctica Region and Scotia Sea: Ocean Currents and Interglacial Sequences on King George Island, West Antarctica The Opening of the Drake Passage and the Instauration of the Antarctic Continental Weathering and Sediment Provenance in the McMurdo Sound Geodynamics Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Circumpolar Current: New Data from the Terror Bank as Indicators for Miocene Ice Sheet Variations, ANDRILL and-2a, Ross Sea, Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Antarctica REF. 3535 Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. REF. 3520 Sjunneskog, Charlote REF. 3551 Álvarez-Valero, Antonio M. The Pliocene and Early Pleistocene Interglacial Environment on the Ross Graham, Alastair REF. 3505 The Dove Basin (Scotia Sea, Antarctica): Geodynamic Setting of its Sea Continental Shelf Bedform Signature of a West Antarctic Palaeo-Ice Stream Reveals a Multi- Wilson, Gary Volcanism, Magnetic Anomalies and K/AR Dating. Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Temporal Record of Flow and Substrate Control: Use of Gravity Data to Characterise Geological Structures beneath the Sea Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Floor, New Harbour, Antarctica REF. 3537 Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. REF. 3521 Pea, Laura REF. 3552 Hodgson, Dominic Calcareous Nannofossil Record of Temperature Variation, Nutrient Maciel Canile, Fernanda REF. 3506 Exploring Former Subglacial Hodgson Lake, Antarctica: Geomorphology, Availability and Dissolution Intensity during the Middle Eocene Climatic Intrabasalt Weathering Horizons and Sediment Overlain by Glacial Wilson, Gary Limnology and Palaeolimnology Optimum at ODP Site 702, South Atlantic Diamictite Record Change from Greenhouse to Icehouse in the Mid Extension of the Victoria Land Basin beneath the Southern McMurdo Ice Shelf Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Eocene – Early Oligocene of West Antarctica – a Potential ANDRILL Target Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. REF. 3523 REF. 3538 Gavidia, Luis Alberto Greenbaum, Jamin REF. 3553 REF. 3507 Characterization of Glacial Sequences on the Antarctic Peninsula Coupled Airborne Radar Sounding and Gravity for Establishing Bathymetry Bohaty, Steven M. Magens, Diana Continental Shelf through the Integration of Resistivity Image, Well Log and Evaluating Melt/Freeze Distribution beneath Ice Shelves: The Ross Ice The Middle Eocene Climatic Optimum: A Key Event in the Eocene Sustained Patterns of Sub-Orbital Cyclicity in Pliocene Interglacial Deposits of Data and 2d Seismic Profiles from ODP Leg 178 Site 1103 Shelf and Totten Glacier, Antarctica Greenhouse to Icehouse Transition the ANDRILL-Mis Core – Insights into Polar Climate System Features Persisting Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. in a Changing World Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone.

36 37 REF. 3556 REF. 3595 4. Authors Cheng, X. REF. 3097 Kryc, Kelly Venuti, Alessandra Ultra-High Resolution Geochemical Record of Holocene Climate Change Paleomagnetic and Magnetic Mineraology Investigations of Late Chow, J. REF. 3535, 3542 in East Antarctic Sediments Pleistocene Sediment Drifts Offshore the Pacific Margin of the Antarctic Chung, E. REF. 3219 Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Peninsula Abrahamowicz, M. REF. 3529 Cody, R. REF. 3475, 3504 Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Alex, P. REF. 3505 Contreras Gutiérrez, P. K. REF. 3361, 3362 REF. 3557 Houben, Alexander REF. 3596 Alfaro, P. REF. 3546, 3566 Cooper, A. REF. 3597 The Middle Eocene Climatic Optimum (MECO) Recorded in the Surface Scherer, Reed Allen, C. REF. 3510, 3444 Corr, H. REF. 3578 Waters of the Southern Ocean: A Dinoflagellate Cyst and Organic The Willans Ice Stream Subglacial Access Research Drilling (WISSARD) Álvarez-Valero, A.M. REF. 3519, 3520, 3528 Costa, E. REF. 3561 Geochemical Perspective Project Anderson, J. REF. 3443, 3444, 3483, 3484 Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Cowan, E. REF. 3493 Andrew, C. REF. 3505 Coxall, H. REF. 3377 REF. 3558 REF. 3599 Andrill Mcmurdo Ice Shelf REF. 3490 Crame, J.A. REF. 3349 Jovane, Luigi Iwai, Masao Science Team Cristini, L. REF. 3472 Magnetic Properties of Oligocene-Eocene Cores from Shaldril II, Diatom Implications of the Neogene Antarctic Glacial History: ODP Leg Andrill Mis-Science Team REF. 3346, 3504, 3567, 3568 Antarctica 178 Sites 1095 and 1097, Antarctic Peninsula Crosta, X. REF. 3390, 3425, 3559 Andrill Science Committee REF. 3343 Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Damaske, D. REF. 3044, 3578 Angiel , P. REF. 3534 David, S. REF. 3505 REF. 3562 Ashworth, A. REF. 3517, 3540, 3560 Davis, J. REF. 3494 Nakai, Mutsumi Assmy, P. REF. 3545 The Relation between Diatom Fossil Populations and Rock Magnetic De Boer, B. REF. 3590 Associated Wissard Project REF. 3596 Properties from the Marine Sediment Cores off Wilkesland East Antarctica De Conto, R. REF. 3182, 3337, 3345, 3363, 3473, 3554, Investigators Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. 3577, 3581, 3583 Ballegeer , A.M. REF. 3499 De Santis, L. REF. 3103, 3348, 3365, 3516 REF. 3564 Barbante, C. REF. 3602 Krajewski, Krzysztof Delmonte, B. REF. 3602 Barbara, M. REF. 3513 Litostratigraphy and Depositional History of the Earliest Miocene Glacio- Delura , K. REF. 3534 Barbeau, Jr., D. L. REF. 3494 Marine Sequence of the Cape Melville Formation, King George Island, Denis, D. REF. 3559 West Antarctica Bárcena , M. A REF. 3499 Díaz De Federico, A. REF. 3520 Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Barnola, J.M. REF. 3602 Diekmann, B. REF. 3113, 3114 Barrett, P.J. REF. 3563, 3598 REF. 3565 Dolan, A. REF. 3406 Bart, P. REF. 3103, 3542, 3544, 3548, 3600 Gazdzicki, Andrzej Domack, E. REF. 3182 The Eocene La Meseta Formation of Seymour Island and its Foraminifera Bartek, L. REF. 3103, 3343, 3345, 3348 Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Donda, F. REF. 3516 Bell, R.E. REF. 3578 Dowdeswell, J. REF. 3156 Bentley, M. REF. 3089, 3460, 3502, 3521 REF. 3566 Dowsett, H.J. REF. 3583 López-Martínez, Jerónimo Bijl, P. K. REF. 3422, 3423, 3557 Dunbar, G. REF. 3493 Mesozoic to Present Stress Field in the Southern Scotia Arc and Antarctic Binnie, S. REF. 3469 Peninsula Margin: Implications in the Development of the Drake Passage Dunbar, R.B. REF. 3182, 3374, 3543, 3547, 3556, 3561 Bintanja, R. REF. 3590 Oceanic Gateway Dutra, E. REF. 3500 Blankenship, D. REF. 3044, 3154, 3530, 3538 Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Edgar, K. REF. 3601 Block, A. REF. 3578 REF. 3568 Ehrmann, W. REF. 3156, 3483, 3509 Bohaty, S. M. REF. 3444, 3476, 3541, 3537, 3553, 3554, Wilson, Terry J. Elieff, S. REF. 3578 3557 Understanding Tectonic-Climate Interactions in Antarctica: Rossmap Escutia , C. REF. 3499, 3516, 3523 Drilling Targets in the Western Ross Sea Bohm, W. REF. 3348 Esper, O. REF. 3114 Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Bohoyo, F. REF. 3468, 3519, 3520, 3524, 3526, 3527, 3528, 3548, 3550, 3566 Fahnestock, M. REF. 3578 REF. 3569 Borchers, A. REF. 3113, 3114 Falconer, T. REF. 3343 Wilson, Terry J. Falk, C. REF. 3489 Links between Neotectonics and Ice Sheets: Constraints from Integrated Braaten, D. REF. 3578 Geophysical Data Sets Brachfeld, S. A. REF. 3549, 3556 Falourds, S. REF. 3602 Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Bradshaw, C. REF. 3591 Fernández Gutiérrez, A. REF. 3361, 3362 Brandes, Jay REF. 3374 Fernández Sánchez, J. F. REF. 3361, 3362 REF. 3576 Ferraccioli, F. REF. 3578 P. Gamboa, Luiz A. Brigham-Grette, J. REF. 3555 Antarctic Climate Changes: Footprints in the Middle Latitudes South Brinkhuis, H. REF. 3135, 3372, 3422, 3423, 3541, 3557 Field, B. REF. 3488 Atlantic Sedimentation. Brown, R. E. REF. 3231 Fielding, C. REF. 3346, 3488, 3568 Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Browne, G. REF. 3488, 3493 Fink, D. REF. 3182 REF. 3584 Buiron, D. REF. 3602 Finn, C. REF. 3578 Florindo, Fabio Butzin, M. REF. 3472 Fioroni, C. REF. 3476, 3511 Andrill Southern Mcmurdo Sound (SMS) Project - Early Miocene to Recent Bylina , P. REF. 3534 Fischbein, S. REF. 3343 Paleoclimate and Geological History of the Victoria Land Basin, Antarctica Fitzgerald, P. REF. 3518 Monday 7th and Tuesday 8th, 5.30 – 6.30pm. Poster Zone. Capron, E. REF. 3602 Carlos Rocha-Campos, A. REF. 3552 Flecker, R. REF. 3591 REF. 3591 Carr, S. A. REF. 3374 Florindo, F. REF. 3135, 3476, 3488, 3492, 3584, 3595 Bradshaw, Catherine Fogwill, C. REF. 3460, 3502 Exploring the Climate of the Late Miocene and the Extent of the East Carson, D. REF. 3559 Antarctic Ice Sheet Carter, L. REF. 3491, 3493 Fragoso, M. REF. 3500 Thursday 10th 5.30–6.30pm. and Friday 11th, 4.30–5.30pm. Poster Zone. Carvalho Da Silva, A. REF. 3550 Francis, J.E. REF. 3349, 3533, 3598 Cattani, O. REF. 3602 François, J. P. REF. 3543 Chappellaz, J. REF. 3602 Frearson, N. REF. 3578

38 39 Frederichs, T. REF. 3114 Huber, M. REF. 3423, 3554, 3585 López - Martínez, J. REF. 3546, 3566 Nishi, H. REF. 3601 Freeman, S. REF. 3469 Hulton, N. REF. 3478 López, J. A. REF. 3362 Nitsche, F. O. REF. 3356 Frezzotti, M. REF. 3602 Hunter, M. REF. 3469 Lourens, L. REF. 3590 Nogi, Y. REF. 3497 Galeotti, S. REF. 3577 Huybers, P. REF. 3586 Lucchi , R.G. REF. 3499 O Cofaigh, C. REF. 3156 Galindo-Zaldívar, J. REF. 3468, 3519, 3520, 3524, 3526, 3527, Huybrechts, P. REF. 3472 Lunt, D. REF. 3406, 3471, 3591 O´leary, M. REF. 3583 3528, 3546, 3548, 3550, 3566 Ibañez, J. M. REF. 3361, 3362 Luyendyk, B. REF. 3343, 3345, 3348, 3473 Oerten, H. REF. 3602 Gandyukhin, V. REF. 3429 Ikehara, M. REF. 3497 Lyle, M. REF. 3601 Ogishima, T. REF. 3562 Ganeshram, R. REF. 3559 Iwai, M. REF. 3599 Maciel Canile, F. REF. 3552 Okuno, J REF. 3487, 3508 Gavidia, L. A. REF. 3523 Iwasaki, S. REF. 3508 Mackay, S. REF. 3540 P. Gamboa, L.A. REF. 3576 Gazdzicki, A. REF. 3565 J Ian, R. REF. 3513 Mackintosh, A. REF. 3182 Palike, H. REF. 3601 Gehrels, G. E. REF. 3494 Jabaloy, A. REF. 3524 Macphee, R. D.E. REF. 3494 Pagani, M. REF. 3554 Genoni, L. REF. 3602 Jamieson, S. REF. 3478 Maemoku, H. REF. 3508 Panter, K. REF. 3488 Gersonde, R. REF. 3114 Jarrard, R. REF. 3567 Maestro, A. REF. 3546, 3566 Pañczyk , M. REF. 3477, 3534 Glossner, A. W. REF. 3374 Johnson, J. REF. 3471, 3502, 3521 Maffioli, P. REF. 3535 Parrenin, F. REF. 3602 Gohl, K. REF. 3090, 3103, 3144, 3145, 3183, 3188, Johnston, L. REF. 3506 Magens, D. REF. 3507 Passchier, S. REF. 3091, 3488, 3489 3191, 3551, 3563, 3598 Jonhson, J. REF. 3089 Maggi, V. REF. 3602 Pattyn, F. REF. 3575 Goldstein, S. L. REF. 3219, 3549 Jordan, T. REF. 3578 Majewski, W. REF. 3444, 3565 Paulsen, T. REF. 3567 Golledge, N. REF. 3182 Jouzel, J. REF. 3602 Maldonado, A. REF. 3468, 3519, 3520, 3524, 3526, 3527, Pea, L. REF. 3511, 3537 Gombosi, D. J. REF. 3494 Jovane, L. REF. 3558 3528, 3548, 3550 Pecskay , Z. REF. 3534 González, F.J. REF. 3519, 3520, 3528 Jurado, M. J. REF. 3523 Mandernack, K.W. REF. 3374 Pedrera, A. REF. 3546, 3566 González, J. J. REF. 3499, 3516, 3523 Katsuki, K. REF. 3497 Manley, P.L. REF. 3444, 3556 Pekar, S. REF. 3091, 3474, 3481, 3488, 3492, 3496, Gore, D. REF. 3182 3505, 3512, 3515, Keely, B. REF. 3522 Marchant, D. REF. 3517, 3540, 3560 Goreman, A. REF. 3506 Perez, L. REF. 3524, 3526, 3527 Kempf, S. REF. 3154 Marenssi, S.A. REF. 3349 Graham, A. REF. 3089, 3156, 3509, 3551 Persico, D. REF. 3476, 3511 Kennett, J. REF. 3345 Martínez-García, A. REF. 3486 Greenbaum, J. REF. 3538 Martinson, D.G. REF. 3587 Petit, J.R. REF. 3602 Kim, J. H. REF. 3135 Gregory, T. REF. 3425 Marvin, S. REF. 3505 Phillips, G. REF. 3485 Konfirst, M. REF. 3535, 3539 Grobe, H. REF. 3114 Massé, G. REF. 3425 Pickering, M. REF. 3522 Koss, H. REF. 3474 Grosfeld, K. REF. 3472 Masson-Delmotte, V. REF. 3602 Pierce, E. L. REF. 3549 Kowalewski, D. REF. 3363, 3540, 3581 Guenthner, W. R. REF. 3494 Mawbey, E. REF. 3377 Pike, J. REF. 3425, 3510 Krajewski , K.P. REF. 3534, 3564 Guerstein, R. REF. 3423 Mckay, R. REF. 3491, 3493 Polenet Science Team REF. 3569 Krissek, L. REF. 3488 Guilderson, T. REF. 3543 Medialdea, T. REF. 3524, 3550 Pollard, D. REF. 3182, 3337, 3345, 3363, 3473, 3581 Kryc, K.A. REF. 3556, 3561 Guillaume, M. REF. 3390 Michael J, H. REF. 3513 Powell, R. D. REF. 3135, 3374, 3482, 3493, 3504, 3596 Kuhn, G. REF. 3389, 3113, 3114, 3143, 3231, 3501, Guseva, J. REF. 3429 3509, 3551 Michalchuk, B. REF. 3444 Pross, J. REF. 3423 Hall, I. REF. 3425 Lacorte Bruguera, S. REF. 3361 Milliken, K. REF. 3444 Puga, E. REF. 3519, 3520, 3528 Hambrey, M. REF. 3471 Lacumin, P. REF. 3602 Minster, B. REF. 3602 Pusz, A. REF. 3494 Hamish, B. REF. 3505 Lake Ellsworth Consortium REF. 3589 Miranda, P. REF. 3500 Pyne, A. REF. 3343 Hartmann, K. REF. 3113 Lanci, L. REF. 3577 Miura, H. REF. 3487, 3508 Rack, F. REF. 3345, 3365 Harwood , D. M. REF. 3135, 3475, 3482, 3488, 3492, 3499, Landais, A. REF. 3602 Mohr, B.A.R. REF. 3349 Raffi, I. REF. 3601 3535, 3584 Larter, R.D. REF. 3089, 3090, 3156, 3183, 3502, 3509, Monaghan, A. REF. 3588 Ramos, M. REF. 3500 Hayward, A.M. REF. 3598 3551 Monien, D. REF. 3231, 3389 Raymo, M.E. REF. 3583 Haywood, A. REF. 3406, 3471, 3563 Laufer, A. REF. 3485 Moreno, C. REF. 3362 Reed, J. REF. 3493 Hearty, P. REF. 3583 Lavoire, C. REF. 3182 Moreno, P. REF. 3543 Reichart, G. J. REF. 3422 Hein, A. REF. 3460 Lawrence, K. REF. 3493 Morijiri, R. REF. 3562 Reiners, P. REF. 3494 Hemming, S. R. REF. 3219, 3529, 3549, 3560 Lear, C. REF. 3091, 3377, 3515 Morin, P. REF. 3531 Renssen, H. REF. 3559 Henderiks, J. REF. 3554 Leitchenkov, G. REF. 3103, 3399, 3429 Mortyn, P. G. REF. 3486 Riesselman, C. REF. 3535, 3547, 3561 Henrys, S. A. REF. 3188, 3103, 3346, 3348, 3504, 3568 Lemieux, B. REF. 3602 Moy, C. REF. 3543 Ritz, C. REF. 3602 Hernández-Molina, F. J. REF. 3468, 3524, 3526, 3527, 3528, 3548, Leng, M. REF. 3521, 3522 Mozer , A. REF. 3534 Roberto Dos Santos, P. REF. 3552 3550 Leventer, A. 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40 41 Ruano, P. REF. 3550 Tulaczyk, S. REF. 3592 Ruiz-Constán, A. REF. 3546, 3566 Tuo, S. REF. 3097 Sabbe, K. REF. 3522 Tuzzi, Eva REF. 3475 Salzmann, U. REF. 3591 Udisti, R. REF. 3602 Sanderson, D. REF. 3521 Ueno, N. REF. 3562 Sandroni, S. REF. 3470, 3577 Uenzelmann-Neben, G. REF. 3183 Sangiorgi, F. REF. 3091, 3135 Valdes, P. REF. 3471 Sauli, C. REF. 3348 Van De Flierdt, T. REF. 3219, 3529, 3549 Scarchilli, C. REF. 3602 Van De Wal, R. REF. 3590 Scarparo Cunha, A.A. REF. 3576 Van Ommen, T. REF. 3530 Scher, Howie D. REF. 3494 Varova, L. REF. 3399, 3429 Scherer, R. REF. 3479, 3535, 3545, 3596 Vaughan, A.P.M. REF. 3349 Schilt, A. REF. 3602 Vázquez, J. T. REF. 3524, 3526, 3527 Schmidt, S. REF. 3559 Venuti, A. REF. 3595 Schouten, S. REF. 3135, 3422, 3541, 3557 Verleyen, E. REF. 3521, 3522 Schreider, A.A. REF. 3468, 3520, 3548, 3550 Verosub, K. REF. 3558 Schroeder, D. REF. 3154 Vieira, G. REF. 3500 Schüpbach, S. REF. 3602 Viereck-Goette, L. G. REF. 3349 Segura Carretero, A. REF. 3361, 3362 Villa, G. REF. 3476, 3479, 3511, 3537 Villa-Martinez, R. REF. 3543 Selmo, E. REF. 3602 Visscher, H. REF. 3423 Seth, A. REF. 3363, 3581 Vogel, S. W. REF. 3231, 3374, 3596 Severi, M. REF. 3602 Voigt, I. REF. 3114 Shevenell, A. REF. 3345 Von Eynatten, H. REF. 3389, 3501 Shipboard Scientific Party REF. 3601 Vyverman, W. REF. 3521, 3522 Siddoway, C.S. REF. 3531, 3532, 3563, 3598 Wakeham, S. G. REF. 3374 Sidorczuk, M. REF. 3564 Wardell, N. REF. 3348 Siegert, M.J. REF. 3530, 3589, 3594 Warnaar, J. REF. 3423 Sinninghe Damste, J. S. REF. 3135 Warner, R. C. REF. 3356, 3530 Sjunneskog, C. REF. 3479, 3535, 3539, 3542 Warnock, J. REF. 3545 Sluijs, A. REF. 3422, 3423, 3557 Weaver, F. REF. 3483 Smellie, J. REF. 3471 Weber, M. REF. 3143 Smith, J. REF. 3089, 3509, 3521, 3551 Weigelt, E. REF. 3183 Smith, T. REF. 3443 Wellner, J. REF. 3444, 3483, 3484 Sms Science Team REF. 3474, 3513, 3584 White, D. REF. 3182 Somoza, J. REF. 3524 Wilch, T. REF. 3493 Somoza, L. REF. 3520, 3526, 3527, 3528, 3548, 3550 Willenbring, J. REF. 3540 Sophie, W. REF. 3513, 3514 Williams, B. REF. 3482 Sorlien, C. REF. 3343, 3345, 3348 Williams, I. S. REF. 3477 Spector, P. REF. 3531 Williams, T. REF. 3219, 3523, 3529, 3549 Speece, M. REF. 3481, 3482, 3492 Willmott, V. REF. 3135 Stenni, B. REF. 3602 Wilson, D. S. REF. 3343, 3345, 3348, 3473, 3598 Stickley, C. E. REF. 3423 Wilson, G. REF. 3481, 3492, 3504, 3505, 3506 Stocker, T. REF. 3602 Wilson, P. A. REF. 3601 Stow, D. A. V. REF. 3526 Wilson, T. REF. 3346, 3567, 3568, 3569 Studinger, M. REF. 3578 Winter, D. REF. 3479, 3535, 3539 Suganuma, Y. REF. 3364 Wise, S. REF. 3345, 3511 Sugden, D. REF. 3460, 3478 Wobbe, F. REF. 3144 Sunwall, D. REF. 3481, 3492 Wright, A. REF. 3530 Suriñach, E. REF. 3520, 3524, 3548, 3550 Yamane, M. REF. 3497, 3498 Swanger, K. REF. 3540 Yamazaki, T. REF. 3364 Swanson-Hysell, N. REF. 3494 Yokoyama, Y. REF. 3364, 3497, 3498 Syed, S. REF. 3515 Young, D. REF. 3154, 3530, 3538 Talarico, F. M. REF. 3389, 3470, 3493, 3577, 3584 Young, N. REF. 3530 Tatur , A. REF. 3534, 3564 Zachos, J. C. REF. 3422, 3553, 3570 Thunell, R. C. REF. 3494 Zahid, K. M. REF. 3494 Tinto, K. REF. 3481, 3492, 3505 Zattin, M. REF. 3470 Tollstrup, D. REF. 3231 Zhao, Q. REF. 3097 Tremblay, B. REF. 3529 Zieliñski, G. REF. 3534, 3564

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