Aberystwyth University Speedup and Fracturing of George VI Ice Shelf
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James Clark Ross
BAS Ref.: JR104 Copy No: CRUISE REPORT JR 104 JAMES CLARK ROSS JAMES CLARK ROSS STANLEY F I RRS JAMES CLARK ROSS Marine geology and geophysics Bellingshausen Sea January – February 2004 BAS Ref.: JR104 Copy No: CRUISE REPORT RRS James Clark Ross Cruise JR104 January to February 2004 Multibeam echo sounding, TOPAS sub-bottom profiling and sediment coring Continental shelf and slope in the Bellingshausen Sea R.D. Larter with contributions from A. Tait, C.J. Pudsey, M.O. Preston, C. Ó Cofaigh, P. Morris, C.-D. Hillenbrand, J. Evans, J.A. Dowdeswell and S.F. Bremner Distribution: 1. Headquarters - Archives 2. Headquarters - Geological Sciences Division (for circulation) 3. RRS James Clark Ross (for circulation) 4. Dr R D Larter 5. Dr C J Pudsey 6. JR50 participants (for circulation) 7. Directorate (for circulation) 8. BAS Technical Services (for circulation) 9. Prof. J A Dowdeswell (Scott Polar Research Institute) This unpublished report contains initial observations and conclusions. It is not to be cited without written permission of the Director, British Antarctic Survey. Frontispiece: ice conditions in the Bellingshausen Sea, (a) as seen from space (top, MODIS satellite image, 1400 on 28th January 2004) showing open water in the Ronne Entrance and Eltanin Bay, and (b) from the ship (~0400 on 31st January at core station BC356, NW of Smyley Island; photo courtesy of Emma Wilson). Back cover: four scientists, a doc and a core. Carol, Emma, Claus-Dieter, Jeff and Colm with freshly recovered sections of core GC380 (photo courtesy of Steve Bremner). -
Rfvotsfroeat a NEWS BULLETI N
?7*&zmmt ■ ■ ^^—^mmmmml RfvOTsfroeaT A NEWS BULLETI N p u b l i s h e d q u a r t e r l y b y t h e NEW ZEALAND ANTARCTIC SOCIETY (INC) AN AUSTRALIAN FLAG FLIES AGAIN OVER THE MAIN HUT BUILT AT CAPE DENISON IN 1911 BY SIR DOUGLAS MAWSON'S AUSTRALASIAN ANTARC TIC EXPEDITION, 1911-14. WHEN MEMBERS OF THE AUSTRALIAN NATIONAL ANTARCTIC RESEARCH EXPEDITION VISITED THE HUT THEY FOUND IT FILLED WITH ICE AND SNOW BUT IN A FAIR STATE OF REPAIR AFTER MORE THAN 60 YEARS OF ANTARCTIC BLIZZARDS WITHOUT MAINTENANCE. Australian Antarctic Division Photo: D. J. Lugg Vol. 7 No. 2 Registered at Post Office Headquarters. Wellington, New Zealand, as a magazine. June, 1974 . ) / E I W W AUSTRALIA ) WELLINGTON / I ^JlCHRISTCHURCH I NEW ZEALAND TASMANIA * Cimpbtll I (NZ) • OSS DEPENDE/V/cy \ * H i l l e t t ( U S ) < t e , vmdi *N** "4#/.* ,i,rN v ( n z ) w K ' T M ANTARCTICA/,\ / l\ Ah U/?VVAY). XA Ten,.""" r^>''/ <U5SR) ,-f—lV(SA) ' ^ A ^ /j'/iiPI I (UK) * M«rion I (IA) DRAWN BY DEPARTMENT OF LANDS & SURVEY WELLINGTON. NEW ZEALAND. AUG 1969 3rd EDITION .-• v ©ex (Successor to "Antarctic News Bulletin") Vol. 7 No. 2 74th ISSUE June, 1974 Editor: J. M. CAFFIN, 35 Chepstow Avenue, Christchurch 5. Address all contributions, enquiries, etc., to the Editor. All Business Communications, Subscriptions, etc., to: Secretary, New Zealand Antarctic Society (Inc.), P.O. Box 1223, Christchurch, N.Z. CONTENTS ARTICLE TOURIST PARTIES 63, 64 POLAR ACTIVITIES NEW ZEALAND .. -
King George VI Wikipedia Page
George VI of the United Kingdom - Wikipedia, the free encyclopedia 10/6/11 10:20 PM George VI of the United Kingdom From Wikipedia, the free encyclopedia (Redirected from King George VI) George VI (Albert Frederick Arthur George; 14 December 1895 – 6 February 1952) was King of the United Kingdom George VI and the Dominions of the British Commonwealth from 11 December 1936 until his death. He was the last Emperor of India, and the first Head of the Commonwealth. As the second son of King George V, he was not expected to inherit the throne and spent his early life in the shadow of his elder brother, Edward. He served in the Royal Navy and Royal Air Force during World War I, and after the war took on the usual round of public engagements. He married Lady Elizabeth Bowes-Lyon in 1923, and they had two daughters, Elizabeth and Margaret. George's elder brother ascended the throne as Edward VIII on the death of their father in 1936. However, less than a year later Edward revealed his desire to marry the divorced American socialite Wallis Simpson. British Prime Minister Stanley Baldwin advised Edward that for political and Formal portrait, c. 1940–46 religious reasons he could not marry Mrs Simpson and remain king. Edward abdicated in order to marry, and George King of the United Kingdom and the British ascended the throne as the third monarch of the House of Dominions (more...) Windsor. Reign 11 December 1936 – 6 February On the day of his accession, the parliament of the Irish Free 1952 State removed the monarch from its constitution. -
Rm Tmjtwsmmw a NEWS BULLETIN
rm tMJtWsmmw A NEWS BULLETIN p u b l i s h e d q u a r t e r l y b y t h e NEW ZEALAND ANTARCTIC SOCIETY (INC) •-**, AN EMPEROR PENGUIN LEADS ITS CHICKS ALONG THE ICE AT CAPE CROZIER, ROSS ISLAND. THE EIGHTH CONSULTATIVE MEETING OF THE ANTARCTIC TREATY NATIONS IN OSLO HAS RECOMMENDED THAT THE CAPE CROZIER LAND AREA WHERE THE ADELIE PENGUINS NEST, AND THE ADJACENT FAST ICE WHERE THE EMPEROR PENGUINS BREED ANNUALLY SHOULD BE DESIG NATED A SITE OF SPECIAL SCIENTIFIC INTEREST. Photo: R. C. Kingsbury. VrtlVOI. 7/, KinISO. 7 / RegisteredWellington, atNew Post Zealand, Office asHeadquarters. a magazine. Cpnipm|.praepteiTIDer, 1975IV/3 SOUTH GEORGIA SOUTH SANDWICH Is f S O U T H O R K N E Y I s x \ * £ & * * — ■ /o Orcadas arg M FALKLAND Is /6Signy I.u.k. , AV\60-W / ,' SOUTH AMERICA / / \ f B o r g a / N I S 4 S O U T H a & WEDDELL \ I SA I / %\ ',mWBSSr t y S H E T L A N D ^ - / Halley Bayf drowning maud land enderby ;n /SEA UK.v? COATSLd / LAND iy (General Belgrano arg ANTARCTIC iXf Mawson MAC ROBERTSON tAND /PENINSULA'^ (see map below) JSobral arg / Siple U S.A Amundsen-Scott I queen MARY LAND ^Mirny [ELLSWORTH"" LAND ° Vostok ussr \ .*/ Ross \"V Nfe ceShef -\? BYRD LAND/^_. \< oCasey Jj aust. WILKES LAND Russkaya USSR./ R O S S | n z j £ \ V d l , U d r / SEA I ^-/VICTORIA .TERRE ^ #^7 LAND \/ADELIE,,;? } G E O R G E \ I L d , t / _ A ? j r . -
The Structural and Dynamic Responses of Stange Ice Shelf to Recent Environmental Change T.O
Antarctic Science 26(6), 646–660 (2014) © Antarctic Science Ltd 2014. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited. doi:10.1017/S095410201400039X The structural and dynamic responses of Stange Ice Shelf to recent environmental change T.O. HOLT1, N.F. GLASSER1, H.A. FRICKER2, L. PADMAN3, A. LUCKMAN4,O.KING5, D.J. QUINCEY6 and M.R. SIEGFRIED2 1Centre for Glaciology, Department of Geography and Earth Sciences, Aberystwyth University, Aberystwyth SY23 3DB, UK 2Scripps Institution of Oceanography, UCSD, 9500 Gilman Drive, La Jolla, CA 92093, USA 3Earth & Space Research, Corvallis, OR 97333, USA 4Department of Geography, Swansea University, Singleton Park, Swansea SA2 8PP, UK 5British Antarctic Survey, NERC, High Cross, Madingley Road, Cambridge CB3 0ET, UK 6School of Geography, University of Leeds, Leeds LS2 9JT, UK [email protected] Abstract: Stange Ice Shelf is the most south-westerly ice shelf on the Antarctic Peninsula, a region where positive trends in atmospheric and oceanic temperatures have been recently documented. In this paper, we use a range of remotely sensed datasets to evaluate the structural and dynamic responses of Stange Ice Shelf to these environmental changes. Ice shelf extent and surface structures were examined at regular intervals from optical and radar satellite imagery between 1973 and 2011. Surface speeds were estimated in 1989, 2004 and 2010 by tracking surface features in successive satellite images. Surface elevation change was estimated using radar altimetry data acquired between 1992 and 2008 by the European Remote Sensing Satellite (ERS) -1, -2 and Envisat. -
Glacial History of the Antarctic Peninsula Since the Last Glacial Maximum—A Synthesis
Glacial history of the Antarctic Peninsula since the Last Glacial Maximum—a synthesis Ólafur Ingólfsson & Christian Hjort The extent of ice, thickness and dynamics of the Last Glacial Maximum (LGM) ice sheets in the Antarctic Peninsula region, as well as the pattern of subsequent deglaciation and climate development, are not well constrained in time and space. During the LGM, ice thickened considerably and expanded towards the middle–outer submarine shelves around the Antarctic Peninsula. Deglaciation was slow, occurring mainly between >14 Ky BP (14C kilo years before present) and ca. 6 Ky BP, when interglacial climate was established in the region. After a climate optimum, peaking ca. 4 - 3 Ky BP, a cooling trend started, with expanding glaciers and ice shelves. Rapid warming during the past 50 years may be causing instability to some Antarctic Peninsula ice shelves. Ó. Ingólfsson, The University Courses on Svalbard, Box 156, N-9170 Longyearbyen, Norway; C. Hjort, Dept. of Quaternary Geology, Lund University, Sölvegatan 13, SE-223 63 Lund, Sweden. The Antarctic Peninsula (Fig. 1) encompasses one Onshore evidence for the LGM ice of the most dynamic climate systems on Earth, extent where the natural systems respond rapidly to climatic changes (Smith et al. 1999; Domack et al. 2001a). Signs of accelerating retreat of ice shelves, Evidence of more extensive ice cover than today in combination with rapid warming (>2 °C) over is present on ice-free lowland areas along the the past 50 years, have raised concerns as to the Antarctic Peninsula and its surrounding islands, future stability of the glacial system (Doake et primarily in the form of glacial drift, erratics al. -
Global Southern Limit of Flowering Plants and Moss Peat Accumulation Peter Convey,1 David W
RESEARCH/REVIEW ARTICLE Global southern limit of flowering plants and moss peat accumulation Peter Convey,1 David W. Hopkins,2,3,4 Stephen J. Roberts1 & Andrew N. Tyler3 1 British Antarctic Survey, National Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK 2 Scottish Crop Research Institute, Invergowrie, Dundee DD2 5DA, UK 3 Environmental Radioactivity Laboratory, School of Biological and Environmental Sciences, University of Stirling, Stirling FK9 4LA, UK 4 School of Life Sciences, Heriot-Watt University, Riccarton, Edinburgh EH14 4AS, UK Keywords Abstract Antarctic plants; distribution limits; peat accumulation; dating. The ecosystems of the western Antarctic Peninsula, experiencing amongst the most rapid trends of regional climate warming worldwide, are important ‘‘early Correspondence warning’’ indicators for responses expected in more complex systems else- Peter Convey, British Antarctic Survey, where. Central among responses attributed to this regional warming are National Environment Research Council, widely reported population and range expansions of the two native Antarctic High Cross, Madingley Road, Cambridge flowering plants, Deschampsia antarctica and Colobanthus quitensis. However, CB3 0ET, UK. E-mail: [email protected] confirmation of the predictions of range expansion requires baseline knowl- edge of species distributions. We report a significant southwards and westwards extension of the known natural distributions of both plant species in this region, along with several range extensions in an unusual moss community, based on a new survey work in a previously unexamined and un-named low altitude peninsula at 69822.0?S71850.7?W in Lazarev Bay, north-west Alexander Island, southern Antarctic Peninsula. These plant species therefore have a significantly larger natural range in the Antarctic than previously thought. -
AUTARKIC a NEWS BULLETIN Published Quarterly by the NEW ZEALAND ANTARCTIC SOCIETY (INC)
AUTARKIC A NEWS BULLETIN published quarterly by the NEW ZEALAND ANTARCTIC SOCIETY (INC) One of Argentina's oldest Antarctic stations. Almirante Brown, which was destroyed by fire on April 12. Situated in picturesque Paradise Bay on the west coast of the Antarctic Peninsula, it was manned first in 1951 by an Argentine Navy detachment, and became a scientific Station in 1955. Pnoto by Colin Monteath w_i -f n M#i R Registered at Post Office Headquarters, VOI. IU, IMO. D Wellington. New Zealand, as a magazine June, 1984 • . SOUTH SANDWICH It SOUTH GEORGIA / SOU1H ORKNEY Is ' \ ^^^----. 6 S i g n y l u K , / ' o O r c a d a s a r g SOUTH AMERICA ,/ Boroa jSyowa%JAPAN \ «rf 7 s a 'Molodezhnaya v/' A S O U T H « 4 i \ T \ U S S R s \ ' E N D E R B Y \ ) > * \ f(f SHETLANO | JV, W/DD Hallev Bay^ DRONNING MAUD LAND / S E A u k v ? C O A T S I d | / LAND T)/ \ Druzhnaya ^General Belgrano arg \-[ • \ z'f/ "i Mawson AlVTARCTIC-\ MAC ROBERTSON LANd\ \ *usi /PENINSUtA'^ [set mjp below) Sobral arg " < X ^ . D a v i s A u s t _ Siple — USA ;. Amundsen-Scon QUEEN MARY LAND ELLSWORTH " q U S A ') LAND ° Vostok ussr / / R o , s \ \ MARIE BYRD fee She/ r*V\ L LAND WILKES LAND Scon A * ROSSI"2*? Vanda n 7 SEA IJ^r 'victoria TERRE . LAND \^„ ADELIE ,> GEORGE V LJ ■Oumout d'Urville iran< 1 L*ningradsfcaya Ar ■ SI USSR,-'' \ ---'•BALIENYU ANTARCTIC PENINSULA 1 Teniente Matienzo arg 2 Esperanza arg 3 Almirante Brown arg 4 Petrel arg 5 Decepcion arg 6 Vicecomodoro Marambio arg * ANTARCTICA 7 Arturo Prat cm.le 8 Bernardo O'Higgms chile 9 Presidents Frei cmile 500 tOOOKiloflinnn 10 Stonington I. -
Southern Elephant Seal Movements and Antarctic Sea Ice H
Antarctic Science 12 (If:3-15 (2000) 0 British Antarctic Survey Printed in the United Kingdom Southern elephant seal movements and Antarctic sea ice H. BORNEMANN1*, M. KREYSCHER', S. RAMDOHRl, T. MARTINZ,A. CARLINP, 1. SELLMANN' and J. PLoTZI 'Alfied- Wegener-lnstitutfir Polar- und Meeresforschung, Postfach 12 01 61, 0-27515 Bremerhaven, Germany 21nstitutfir Meereskunde, Diisternbrooker Weg 20,D-24105 Kiel, Germany 3Departamento de Ciencias Bioldgicas, Instituto Antcirtico Argentino, Cerrito 1248, 1010 Buenos Aires, Argentina 4Dienstleistungfur Wissenschaft und Forschung, Am Bremerhavener Innovations- und Griinderzentrum, Stresemannstrasse 46, 0-27568 Bremerhaven, Germany *[email protected] Abstract: Weaned pups and post-moult female elephant seals (Mirounga leonina) were fitted with satellite transmitters at King George Island (South Shetland Islands) between December 1996 and February 1997. Of the nine adult females tracked for more than two months, three stayed in a localized area between the South Shetland Islands and the South Orkney Islands. The other six females travelled south-west along the coast of the Antarctic Peninsula up to the Bellingshausen Sea. Two of them then moved north-east and hauled out on South Georgia in October. One female was last located north of the South Shetland Islands in March 1998. In total, eight females were again sighted on King George Island and six of the transmitters removed. The tracks of the weaners contrasted with those of the adults. In January, five juveniles left King George Island for the Pacific sector spending about four weeks in the open sea west of the De Gerlache Seamounts. Three of them returned to the tip of the Antarctic Peninsula in June, of which one was last located on the Patagonian Shelf in November 1997. -
Whitehouse Et Al., 2012B) and the Alexander Island Has a Mean Annual Air Temperature of C
Quaternary Science Reviews 177 (2017) 189e219 Contents lists available at ScienceDirect Quaternary Science Reviews journal homepage: www.elsevier.com/locate/quascirev Ice-dammed lateral lake and epishelf lake insights into Holocene dynamics of Marguerite Trough Ice Stream and George VI Ice Shelf, Alexander Island, Antarctic Peninsula * Bethan J. Davies a, b, , Michael J. Hambrey b, Neil F. Glasser b, Tom Holt b, Angel Rodes c, John L. Smellie d, Jonathan L. Carrivick e, Simon P.E. Blockley a a Centre for Quaternary Research, Royal Holloway University of London, Egham, Surrey, TW20 0EX, UK b Institute of Geography and Earth Sciences, Aberystwyth University, Ceredigion, SY23 3DB, Wales, UK c SUERC, Rankine Avenue, East Kilbride, G75 0QF, Scotland, UK d Department of Geology, University of Leicester, Leicester, LE1 7RH, UK e School of Geography and Water@leeds, University of Leeds, Woodhouse Lane, Leeds, West Yorkshire, LS2 9JT, UK article info abstract Article history: We present new data regarding the past dynamics of Marguerite Trough Ice Stream, George VI Ice Shelf Received 5 June 2017 and valley glaciers from Ablation Point Massif on Alexander Island, Antarctic Peninsula. This ice-free Received in revised form oasis preserves a geological record of ice stream lateral moraines, ice-dammed lakes, ice-shelf mo- 1 October 2017 raines and valley glacier moraines, which we dated using cosmogenic nuclide ages. We provide one of Accepted 12 October 2017 the first detailed sediment-landform assemblage descriptions of epishelf lake shorelines. Marguerite Trough Ice Stream imprinted lateral moraines against eastern Alexander Island at 120 m at Ablation Point Massif. During deglaciation, lateral lakes formed in the Ablation and Moutonnee valleys, dammed against Keywords: Holocene the ice stream in George VI Sound. -
The Structural and Dynamic Responses of Stange Ice Shelf to Recent Environmental Change T.O
Antarctic Science 26(6), 646–660 (2014) © Antarctic Science Ltd 2014. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited. doi:10.1017/S095410201400039X The structural and dynamic responses of Stange Ice Shelf to recent environmental change T.O. HOLT1, N.F. GLASSER1, H.A. FRICKER2, L. PADMAN3, A. LUCKMAN4,O.KING5, D.J. QUINCEY6 and M.R. SIEGFRIED2 1Centre for Glaciology, Department of Geography and Earth Sciences, Aberystwyth University, Aberystwyth SY23 3DB, UK 2Scripps Institution of Oceanography, UCSD, 9500 Gilman Drive, La Jolla, CA 92093, USA 3Earth & Space Research, Corvallis, OR 97333, USA 4Department of Geography, Swansea University, Singleton Park, Swansea SA2 8PP, UK 5British Antarctic Survey, NERC, High Cross, Madingley Road, Cambridge CB3 0ET, UK 6School of Geography, University of Leeds, Leeds LS2 9JT, UK [email protected] Abstract: Stange Ice Shelf is the most south-westerly ice shelf on the Antarctic Peninsula, a region where positive trends in atmospheric and oceanic temperatures have been recently documented. In this paper, we use a range of remotely sensed datasets to evaluate the structural and dynamic responses of Stange Ice Shelf to these environmental changes. Ice shelf extent and surface structures were examined at regular intervals from optical and radar satellite imagery between 1973 and 2011. Surface speeds were estimated in 1989, 2004 and 2010 by tracking surface features in successive satellite images. Surface elevation change was estimated using radar altimetry data acquired between 1992 and 2008 by the European Remote Sensing Satellite (ERS) -1, -2 and Envisat. -
An Improved Bathymetry Compilation for the Bellingshausen Sea, Antarctica, to Inform Ice-Sheet and Ocean Models
The Cryosphere, 5, 95–106, 2011 www.the-cryosphere.net/5/95/2011/ The Cryosphere doi:10.5194/tc-5-95-2011 © Author(s) 2011. CC Attribution 3.0 License. An improved bathymetry compilation for the Bellingshausen Sea, Antarctica, to inform ice-sheet and ocean models A. G. C. Graham1, F. O. Nitsche2, and R. D. Larter1 1Ice Sheets programme, British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET, UK 2Lamont Doherty Earth Observatory of Columbia University, 61 Route 9W, Palisades, New York, 10964, USA Received: 30 September 2010 – Published in The Cryosphere Discuss.: 15 October 2010 Revised: 14 January 2011 – Accepted: 3 February 2011 – Published: 16 February 2011 Abstract. The southern Bellingshausen Sea (SBS) is a ning and acceleration of the WAIS, measure changes to its rapidly-changing part of West Antarctica, where oceanic and glaciers and ice shelves at ocean margins, and estimate the atmospheric warming has led to the recent basal melting impacts of future changes on the environment (including sea and break-up of the Wilkins ice shelf, the dynamic thin- level), with implications for society as a whole (e.g. Over- ning of fringing glaciers, and sea-ice reduction. Accurate peck and Weiss, 2009). sea-floor morphology is vital for understanding the contin- A concerted focus of West Antarctic studies is on the ued effects of each process upon changes within Antarc- southern Bellingshausen Sea (SBS), fed by ice draining tica’s ice sheets. Here we present a new bathymetric grid for the WAIS as well as the adjoining Antarctic Pensinusla the SBS compiled from shipborne multibeam echo-sounder, Ice Sheet, where major changes are already taking place spot-sounding and sub-ice measurements.