Getz Ice Shelf Melting Response to Changes in Ocean Forcing S
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The Cryosphere, 14, 1399–1408, 2020 https://doi.org/10.5194/tc-14-1399-2020 © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License. Getz Ice Shelf melt enhanced by freshwater discharge from beneath the West Antarctic Ice Sheet Wei Wei1, Donald D. Blankenship1, Jamin S. Greenbaum1, Noel Gourmelen2, Christine F. Dow3, Thomas G. Richter1, Chad A. Greene4, Duncan A. Young1, SangHoon Lee5, Tae-Wan Kim5, Won Sang Lee5, and Karen M. Assmann6,a 1Institute for Geophysics and Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, Austin, Texas, USA 2School of GeoSciences, University of Edinburgh, Edinburgh, UK 3Department of Geography and Environmental Management, University of Waterloo, Waterloo, Ontario, Canada 4Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA 5Korea Polar Research Institute, Incheon, South Korea 6Department of Earth Sciences, University of Gothenburg, Gothenburg, Sweden apresent address: Institute of Marine Research, Tromsø, Norway Correspondence: Wei Wei ([email protected]) Received: 18 July 2019 – Discussion started: 26 July 2019 Revised: 8 March 2020 – Accepted: 10 March 2020 – Published: 27 April 2020 Abstract. Antarctica’s Getz Ice Shelf has been rapidly thin- 1 Introduction ning in recent years, producing more meltwater than any other ice shelf in the world. The influx of fresh water is The Getz Ice Shelf (Getz herein) in West Antarctica is over known to substantially influence ocean circulation and bi- 500 km long and 30 to 100 km wide; it produces more fresh ological productivity, but relatively little is known about water than any other source in Antarctica (Rignot et al., 2013; the factors controlling basal melt rate or how basal melt is Jacobs et al., 2013), and in recent years its melt rate has spatially distributed beneath the ice shelf. -
FRISP 2018 PROGRAM (Abstracts Below)
FRISP 2018 PROGRAM (Abstracts below) Monday 3rd 19h00: Arrival in Aussois. 20h00: Dinner. Tuesday 4th 7h30 – 8h30: Breakfast. 8h30 – 8h40: Welcome and Introduction (JB. Sallée & N. Joudain) 8h40 – 10h20: 5 presentations. [Weddell/FRIS, 1st part] • Svenja Ryan. • Markus Janout. • Tore Hattermann. • Camille Akhoudas. • Kaitlin Naughten. 10h20 – 10h40: Tea or coffee Break. 10h40 – 12h00: 4 presentations. [Weddell/FRIS, 2nd part] • Kjersti Daae. • Keith Nicholls. • Ole Zeising. • Lukrecia Stulic. 12h00 – 14h00: Lunch. 14h00 – 16h00: 6 presentations. [Greenland] • Lu An. • Jérémie Mouginot. • Irena Vankova. • Fiama Straneo. • Julia Christmann. • Donald Slater. 16h00 – 18h00: Posters. 19h00: Dinner. Wednesday 5th 7h30 – 8h30: Breakfast. 8h30 – 10h10: 5 presentations. [Processes and parameterizations] • Lionel Favier. • Adrian Jenkins. • Catherine Vreugdenhil. • Lucie Vignes. • Stephen Warren. 10h10 – 10h40: Tea or coffee break. 10h40 – 12h00: 4 presentations. [Ross] • Stevens Craig. • Alena Malyarenko. • Carolyn Branecky Begeman. • Justin Lawrence. 12h00 – 14h00: Lunch. 14h00 – 16h00: 6 presentations. [Amundsen] • Karen Assmann. • Tae-Wan Kim. • Yoshihiro Nakayama. • Paul Holland. • Alessandro Silvano. • Won Sang Lee. 16h00 – 18h00: Posters. 19h00: Dinner. Thursday 6th 7h30 – 8h30: Breakfast. 8h30 – 9h50: 4 presentations. [Antarctic ice sheet/Southern Ocean] • Ole Richter. • Xylar Asay-Davis. • Bertie Miles. • William Lipscomb. 9h50 – 10h20: Tea or coffee Break. 10h20 – 11h20: 3 presentations [East Antarctica] • Minowa Masahiro. • Chad Greene. -
Glacier Change Along West Antarctica's Marie Byrd Land Sector
Glacier change along West Antarctica’s Marie Byrd Land Sector and links to inter-decadal atmosphere-ocean variability Frazer D.W. Christie1, Robert G. Bingham1, Noel Gourmelen1, Eric J. Steig2, Rosie R. Bisset1, Hamish D. Pritchard3, Kate Snow1 and Simon F.B. Tett1 5 1School of GeoSciences, University of Edinburgh, Edinburgh, UK 2Department of Earth & Space Sciences, University of Washington, Seattle, USA 3British Antarctic Survey, Cambridge, UK Correspondence to: Frazer D.W. Christie ([email protected]) Abstract. Over the past 20 years satellite remote sensing has captured significant downwasting of glaciers that drain the West 10 Antarctic Ice Sheet into the ocean, particularly across the Amundsen Sea Sector. Along the neighbouring Marie Byrd Land Sector, situated west of Thwaites Glacier to Ross Ice Shelf, glaciological change has been only sparsely monitored. Here, we use optical satellite imagery to track grounding-line migration along the Marie Byrd Land Sector between 2003 and 2015, and compare observed changes with ICESat and CryoSat-2-derived surface elevation and thickness change records. During the observational period, 33% of the grounding line underwent retreat, with no significant advance recorded over the remainder 15 of the ~2200 km long coastline. The greatest retreat rates were observed along the 650-km-long Getz Ice Shelf, further west of which only minor retreat occurred. The relative glaciological stability west of Getz Ice Shelf can be attributed to a divergence of the Antarctic Circumpolar Current from the continental-shelf break at 135° W, coincident with a transition in the morphology of the continental shelf. Along Getz Ice Shelf, grounding-line retreat reduced by 68% during the CryoSat-2 era relative to earlier observations. -
Hydrography and Phytoplankton Distribution in the Amundsen and Ross Seas
W&M ScholarWorks Dissertations, Theses, and Masters Projects Theses, Dissertations, & Master Projects 2009 Hydrography and Phytoplankton Distribution in the Amundsen and Ross Seas Glaucia M. Fragoso College of William and Mary - Virginia Institute of Marine Science Follow this and additional works at: https://scholarworks.wm.edu/etd Part of the Marine Biology Commons, and the Oceanography Commons Recommended Citation Fragoso, Glaucia M., "Hydrography and Phytoplankton Distribution in the Amundsen and Ross Seas" (2009). Dissertations, Theses, and Masters Projects. Paper 1539617887. https://dx.doi.org/doi:10.25773/v5-kwnk-k208 This Thesis is brought to you for free and open access by the Theses, Dissertations, & Master Projects at W&M ScholarWorks. It has been accepted for inclusion in Dissertations, Theses, and Masters Projects by an authorized administrator of W&M ScholarWorks. For more information, please contact [email protected]. Hydrography and phytoplankton distribution in the Amundsen and Ross Seas A Thesis Presented to The Faculty of the School of Marine Science The College of William and Mary in Virginia In Partial Fulfillment of the Requirements for the Degree of Master of Science by Glaucia M. Fragoso 2009 APPROVAL SHEET This thesis is submitted in partial fulfillment of the requirements for the degree of Master of Science UAA£ a Ck laucia M. Frago Approved by the Committee, November 2009 Walker O. Smith, Ph D. Commitfbe Chairman/Advisor eborah A. BronkfPh.D Deborah K. Steinberg, Ph Kam W. Tang ■ Ph.D. DEDICATION I dedicate this work to my parents, Claudio and Vera Lucia Fragoso, and family for their encouragement, guidance and unconditional love. -
A Submarine Wall Protecting the Amundsen Sea Intensifies Melting of Neighboring Ice Shelves Özgür Gürses1, Vanessa Kolatschek1, Qiang Wang1, Christian B
The Cryosphere Discuss., https://doi.org/10.5194/tc-2019-32 Manuscript under review for journal The Cryosphere Discussion started: 15 March 2019 c Author(s) 2019. CC BY 4.0 License. Brief communication: A submarine wall protecting the Amundsen Sea intensifies melting of neighboring ice shelves Özgür Gürses1, Vanessa Kolatschek1, Qiang Wang1, Christian B. Rodehacke1, 2 1Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, D-27570, Germany 5 2Danish Meteorological Institute, Copenhagen Ø, DK-2100, Denmark Correspondence to: Christian B. Rodehacke ([email protected]) Abstract Disintegration of ice shelves in the Amundsen Sea has the potential to cause sea level rise by inducing an acceleration of grounded ice streams. Moore et al (2018) proposed that using a submarine wall to block the penetration of warm water into 10 the ice shelf cavities could reduce this risk. We use a global sea ice-ocean model to show that a wall shielding the Amundsen Sea below 350 m depth successfully suppresses the inflow of warm water and reduces ice shelf melting. However, the warm water gets redirected towards neighboring ice shelves, which reduces the effectiveness of the wall. 1 Introduction One of the consequences of the warming in the Earth's climate system is sea level rise. Sea level rise will impact coastal 15 societies, and economic activities in these areas. Currently the main contributors to rising global mean sea level are a steric component driven by the thermal expansion of the warming ocean, the mass loss from the Greenland Ice Sheet, and the world-wide retreat of glaciers (Rietbroek et al., 2016). -
I!Ij 1)11 U.S
u... I C) C) co 1 USGS 0.. science for a changing world co :::2: Prepared in cooperation with the Scott Polar Research Institute, University of Cambridge, United Kingdom Coastal-change and glaciological map of the (I) ::E Bakutis Coast area, Antarctica: 1972-2002 ;::+' ::::r ::J c:r OJ ::J By Charles Swithinbank, RichardS. Williams, Jr. , Jane G. Ferrigno, OJ"" ::J 0.. Kevin M. Foley, and Christine E. Rosanova a :;:,..... CD ~ (I) I ("') a Geologic Investigations Series Map I- 2600- F (2d ed.) OJ ~ OJ '!; :;:, OJ ::J <0 co OJ ::J a_ <0 OJ n c; · a <0 n OJ 3 OJ "'C S, ..... :;:, CD a:r OJ ""a. (I) ("') a OJ .....(I) OJ <n OJ n OJ co .....,...... ~ C) .....,0 ~ b 0 C) b C) C) T....., Landsat Multispectral Scanner (MSS) image of Ma rtin and Bea r Peninsulas and Dotson Ice Shelf, Bakutis Coast, CT> C) An tarctica. Path 6, Row 11 3, acquired 30 December 1972. ? "T1 'N 0.. co 0.. 2003 ISBN 0-607-94827-2 U.S. Department of the Interior 0 Printed on rec ycl ed paper U.S. Geological Survey 9 11~ !1~~~,11~1!1! I!IJ 1)11 U.S. DEPARTMENT OF THE INTERIOR TO ACCOMPANY MAP I-2600-F (2d ed.) U.S. GEOLOGICAL SURVEY COASTAL-CHANGE AND GLACIOLOGICAL MAP OF THE BAKUTIS COAST AREA, ANTARCTICA: 1972-2002 . By Charles Swithinbank, 1 RichardS. Williams, Jr.,2 Jane G. Ferrigno,3 Kevin M. Foley, 3 and Christine E. Rosanova4 INTRODUCTION areas Landsat 7 Enhanced Thematic Mapper Plus (ETM+)), RADARSAT images, and other data where available, to compare Background changes over a 20- to 25- or 30-year time interval (or longer Changes in the area and volume of polar ice sheets are intri where data were available, as in the Antarctic Peninsula). -
Your Cruise the Ross
The Ross Sea From 16/2/2022 From Ushuaia Ship: LE COMMANDANT CHARCOT to 12/3/2022 to Ushuaia Sailing the Ross Sea means discovering one of the most extreme and conserved universes in the Antarctic. Partially occupied by the Ross Ice Shelf, the largest ice platform in Antarctica , this immense bay located several hundred kilometres from theSouth Pole, is considered as the“ last ocean”, the last intact marine ecosystem and the largest marine sanctuary since 2016. Here, the cold is more intense, the wind more powerful, the ice more impressive, and the scenery more spectacular… In the heart of this polar Garden of Eden, where the ice shelf turns into icebergs, you will encounter prodigious fauna, as well assurrealist landscapes, with infinite shades of blue and stunning reliefs. Antarctic petrels, Minke whales, orcas and seals are at home here, as are very large Overnight in Santiago + flight Santiago/Ushuaia + transfers + flight Ushuaia/Santiago colonies of Adelie and emperor penguins. We are privileged guests in these extreme lands where we are at the mercy of weather and ice conditions. Our navigation will be determined by the type of ice we come across; as the coastal ice must be preserved, we will take this factor into account from day to day in our itineraries. The sailing schedule and any landings, activities and wildlife encounters are subject to weather and ice conditions. These experiences are unique and vary with each departure. The Captain and the Expedition Leader will make every effort to ensure that your experience is as rich as possible, while respecting safety instructions and regulations imposed by the IAATO. -
Getz Ice Shelf Melt Enhanced by Freshwater Discharge from Beneath the West Antarctic Ice Sheet
Edinburgh Research Explorer Getz Ice Shelf melt enhanced by freshwater discharge from beneath the West Antarctic Ice Sheet Citation for published version: Wei, W, Blankenship, DD, Greenbaum, JS, Gourmelen, N, Dow, CF, Richter, TG, Greene, CA, Young, DA, Lee, S, Kim, T, Lee, WS & Assmann, KM 2020, 'Getz Ice Shelf melt enhanced by freshwater discharge from beneath the West Antarctic Ice Sheet', Cryosphere, vol. 14, no. 4, pp. 1399-1408. https://doi.org/10.5194/tc- 14-1399-2020 Digital Object Identifier (DOI): 10.5194/tc-14-1399-2020 Link: Link to publication record in Edinburgh Research Explorer Document Version: Publisher's PDF, also known as Version of record Published In: Cryosphere Publisher Rights Statement: © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License. General rights Copyright for the publications made accessible via the Edinburgh Research Explorer is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights. Take down policy The University of Edinburgh has made every reasonable effort to ensure that Edinburgh Research Explorer content complies with UK legislation. If you believe that the public display of this file breaches copyright please contact [email protected] providing details, and we will remove access to the work immediately and investigate your claim. Download date: 10. Oct. 2021 The Cryosphere, 14, 1399–1408, 2020 https://doi.org/10.5194/tc-14-1399-2020 © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License. -
Glacier Change Along West Antarctica's
The Cryosphere, 12, 2461–2479, 2018 https://doi.org/10.5194/tc-12-2461-2018 © Author(s) 2018. This work is distributed under the Creative Commons Attribution 4.0 License. Glacier change along West Antarctica’s Marie Byrd Land Sector and links to inter-decadal atmosphere–ocean variability Frazer D. W. Christie1, Robert G. Bingham1, Noel Gourmelen1, Eric J. Steig2, Rosie R. Bisset1, Hamish D. Pritchard3, Kate Snow1, and Simon F. B. Tett1 1School of GeoSciences, University of Edinburgh, Edinburgh, EH8 9XP, UK 2Department of Earth & Space Sciences, University of Washington, Seattle, WA 98195-1310, USA 3NERC British Antarctic Survey, Cambridge, CB3 0ET, UK Correspondence: Robert Bingham ([email protected]) Received: 27 November 2017 – Discussion started: 29 January 2018 Revised: 29 June 2018 – Accepted: 3 July 2018 – Published: 26 July 2018 Abstract. Over the past 20 years satellite remote sensing tively, our findings underscore the importance of spatial and has captured significant downwasting of glaciers that drain inter-decadal variability in atmosphere and ocean interac- the West Antarctic Ice Sheet into the ocean, particularly tions in moderating glaciological change around Antarctica. across the Amundsen Sea Sector. Along the neighbouring Marie Byrd Land Sector, situated west of Thwaites Glacier to Ross Ice Shelf, glaciological change has been only sparsely 1 Introduction monitored. Here, we use optical satellite imagery to track grounding-line migration along the Marie Byrd Land Sec- Recent in situ and satellite remote sensing campaigns have tor between 2003 and 2015, and compare observed changes played an important role in constraining the relative roles of with ICESat and CryoSat-2-derived surface elevation and ice, ocean and atmosphere interactions responsible for con- thickness change records. -
In This Issue
October 1997 Volume XXXII—Number 2 In this issue... Interim head of the Office of Polar Programs appointed Highlights of the 1997–1998 research season Sea-ice conditions force Cape Roberts drill team to withdraw early Teachers at the Poles U.S. Antarctic Program news RADARSAT: Making a digital mosaic of Antarctica Science notebook: News from For the first time in 160 days, the sun begins to rise over McMurdo Station, Antarctica and beyond Antarctica, on 19 August 1997. Though austral spring is still a month away, the sun's return means resumption of flights to and from the base—and the end of Current Antarctic Literature high- isolation for the 154 Americans who spent the winter at the station. Within days lights of the sunrise, 60 new staff members as well as fresh food, newspapers, and mail were delivered to McMurdo. The rising sun also marks the beginning of a 1997–1998 austral summer field new field season on the southernmost continent. season begins early Glaciological delineation of the dynamic coastline of Antarctica The National Science Foundation (NSF) provides awards for research and edu- Antarctica and sea-level change cation in the sciences and engineering. The awardee is wholly responsible for the conduct of such research and preparation of the results for publication. The Foundation awards of funds for Foundation, therefore, does not assume responsibility for the research findings antarctic projects, 1 October or their interpretation. 1996 through 31 January 1997 The Foundation welcomes proposals from all qualified scientists and engi- neers and strongly encourages women, minorities, and persons with disabili- ties to compete fully in any of the research- and education-related programs described here. -
UC Irvine UC Irvine Previously Published Works
UC Irvine UC Irvine Previously Published Works Title Getz Ice Shelf melting response to changes in ocean forcing Permalink https://escholarship.org/uc/item/5dh788mw Journal Journal of Geophysical Research: Oceans, 118(9) ISSN 2169-9275 Authors Jacobs, S Giulivi, C Dutrieux, P et al. Publication Date 2013-09-01 DOI 10.1002/jgrc.20298 License https://creativecommons.org/licenses/by/4.0/ 4.0 Peer reviewed eScholarship.org Powered by the California Digital Library University of California JOURNAL OF GEOPHYSICAL RESEARCH: OCEANS, VOL. 118, 4152–4168, doi:10.1002/jgrc.20298, 2013 Getz Ice Shelf melting response to changes in ocean forcing S. Jacobs,1 C. Giulivi,1 P. Dutrieux,2 E. Rignot,3,4 F. Nitsche,1 and J. Mouginot3,4 Received 12 March 2013; revised 14 June 2013; accepted 29 June 2013; published 5 September 2013. [1] The large and complex Getz Ice Shelf extends along nearly half of the West Antarctic coastline in the Amundsen Sea and is exposed to a more variable ocean environment than most other Pacific sector ice shelves. Ocean temperature, salinity, and dissolved oxygen profiles acquired near its sub-ice cavity openings are used here to estimate seawater transports and meltwater fractions. More complete coverage during 2000 and 2007 brackets most of the variability observed from 1994 to 2011, and yearlong records near one ice front support the use of summer profiles to determine annual basal melt rates. We find area average rates of 1.1 and 4.1 m/yr, higher in 2007 when a larger volume of warmer deep water occupied the adjacent continental shelf, and the ocean circulation was stronger. -
US Geological Survey Scientific Activities in the Exploration of Antarctica: 1946–2006 Record of Personnel in Antarctica and Their Postal Cachets: US Navy (1946–48, 1954–60), International
Prepared in cooperation with United States Antarctic Program, National Science Foundation U.S. Geological Survey Scientific Activities in the Exploration of Antarctica: 1946–2006 Record of Personnel in Antarctica and their Postal Cachets: U.S. Navy (1946–48, 1954–60), International Geophysical Year (1957–58), and USGS (1960–2006) By Tony K. Meunier Richard S. Williams, Jr., and Jane G. Ferrigno, Editors Open-File Report 2006–1116 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior DIRK KEMPTHORNE, Secretary U.S. Geological Survey Mark D. Myers, Director U.S. Geological Survey, Reston, Virginia 2007 For product and ordering information: World Wide Web: http://www.usgs.gov/pubprod Telephone: 1-888-ASK-USGS For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment: World Wide Web: http://www.usgs.gov Telephone: 1-888-ASK-USGS Although this report is in the public domain, permission must be secured from the individual copyright owners to reproduce any copyrighted material contained within this report. Cover: 2006 postal cachet commemorating sixty years of USGS scientific innovation in Antarctica (designed by Kenneth W. Murphy and Tony K. Meunier, art work by Kenneth W. Murphy). ii Table of Contents Introduction......................................................................................................................................................................1 Selected.References.........................................................................................................................................................2