C11E:
Records of Post-LGM Antarctic Ice Sheet Contraction I

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Session ID#: 34046

Session Description:
During the LGM, the Antarctic Ice Sheets (AISs) were grounded near the continental-shelf edge. In post-LGM time, the ice sheets retreated and the ice-sheet surface lowered. Ice-sheet contraction is recorded by backstepping grounding zone wedges. In the continental interiors, ice-sheet deflation is recorded by exposure of formerly ice-covered land. Sea-level rise has long been suggested as a driver of AIS retreat but satellite and physical oceanographic measurements demonstrate that melting at the grounding lines in places is related to warm ocean water. Uncertainty concerning the existence and strength of various teleconnections is due to two factors: 1) the laboriousness of acquiring aerially extensive surveys needed to make detailed ice-sheet reconstructions; and 2) the difficulty in achieving accurate dating of marine sediments and of terrestrial exposure surfaces, making comparison of ice-sheet reconstructions across regions tenuous. We welcome both terrestrial and marine field-based studies and numerical modeling of the post-LGM AIS retreat.
Primary Convener:  Philip J Bart, Louisiana State University, Department of Geology and Geophysics, Baton Rouge, United States
Conveners:  Slawek M Tulaczyk, University of California Santa Cruz, Earth and Planetary Sciences, Santa Cruz, CA, United States and Julia Wellner, University of Houston, Houston, TX, United States
Chairs:  Philip J Bart, Department of Geology and Geophysics, Louisiana State University, Baton Rouge, United States, Slawek M Tulaczyk, University of California Santa Cruz, Earth and Planetary Sciences, Santa Cruz, United States and Julia Wellner, University of Houston, Houston, TX, United States
OSPA Liaison:  Slawek M Tulaczyk, University of California Santa Cruz, Earth and Planetary Sciences, Santa Cruz, United States
Index Terms:

0724 Ice cores [CRYOSPHERE]
0726 Ice sheets [CRYOSPHERE]
1626 Global climate models [GLOBAL CHANGE]
9310 Antarctica [GEOGRAPHIC LOCATION]

Abstracts Submitted to this Session:

Extensive Holocene ice sheet grounding line retreat and uplift-driven readvance in West Antarctica (Invited) (241378)
Jonathan Kingslake1, Prof. Reed P Scherer, PhD2, Torsten Albrecht3, Jason James Coenen4, Ross D Powell5, Ronja Reese3, Nathan Stansell6, Slawek M Tulaczyk7 and Pippa Whitehouse8, (1)Lamont-Doherty Earth Observatory, Palisades, NY, United States, (2)Northern Illinois Univ, De Kalb, United States, (3)Potsdam Institute for Climate Impact Research (PIK), Potsdam, Germany, (4)Northern Illinois University, DeKalb, United States, (5)Northern Illinois Univ., Geology and Environmental Geosciences, De Kalb, IL, United States, (6)Northern Illinois University, Department of Earth, Atmosphere and Environment, DeKalb, United States, (7)University of California Santa Cruz, Earth and Planetary Sciences, Santa Cruz, United States, (8)Durham University, Department of Geography, Durham, United Kingdom
Neoglacial Antarctic sea-ice expansion driven by mid-Holocene retreat of the Ross Ice Shelf. (211505)
James A Bendle1, Kate Newton2, Robert M Mckay3, Xavier Crosta4, Johan Etourneau5, Albot B Anya6, Osamu Seki7, Nicholas R Golledge8,9, Nancy A.N. Bertler3,8, Veronica Willmott10, Stefan Schouten11,12, Christina R Riesselman13, Guillaume Masse14 and Robert B Dunbar15, (1)University of Birmingham, School of Geography, Earth and Environmental Sciences, Birmingham, United Kingdom, (2)University of Birmingham, Birmingham, United Kingdom, (3)Victoria University of Wellington, Antarctic Research Centre, Wellington, New Zealand, (4)University of Bordeaux, CNRS, UMR 5805 EPOC, Pessac Cedex, France, (5)Université de Bordeaux, Environments et Paléoenvironments Océaniques et Continentaux, Bordeaux, France, (6)Victoria University of Wellington, Wellington, New Zealand, (7)Hokkaido University, Institute of Low Temperature Science, Sapporo, Japan, (8)GNS Science-Institute of Geological and Nuclear Sciences Ltd, Lower Hutt, New Zealand, (9)Antarctic Research Centre, Victoria University of Wellington, Wellington, New Zealand, (10)Alfred Wegener Institut Fur Polar, Bremerhaven, Germany, (11)NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology and Biogeochemistry, Texel, Netherlands, (12)Utrecht University, Department of Earth Sciences, Utrecht, Netherlands, (13)University of Otago, Departments of Geology and Marine Science, Dunedin, New Zealand, (14)Université Laval, Québec, QC, Canada, (15)Stanford University, Oceans, Stanford, United States
Long-term Glacial History of the West Antarctic Ice Sheet from Cosmogenic Nuclides in a Subglacial Bedrock Core (296267)
John Stone1, Perry E Spector1, Trevor Hillebrand2 and Joel H Gombiner1, (1)University of Washington, Department of Earth and Space Sciences, Seattle, WA, United States, (2)Los Alamos National Laboratory, Los Alamos, United States
Eastern Ross Ice Sheet Deglacial History inferred from the Roosevelt Island Ice Core (289394)
Tyler J Fudge1, Christo Buizert2, James Lee3, Edwin D Waddington4, Nancy A.N. Bertler5, Howard Conway4, Edward J Brook2 and Jeffrey P Severinghaus6, (1)University of Washington, Earth and Space Sciences, Seattle, United States, (2)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States, (3)Oregon State Univ, Corvallis, OR, United States, (4)University of Washington, Department of Earth and Space Sciences, Seattle, WA, United States, (5)GNS Science-Institute of Geological and Nuclear Sciences Ltd, Lower Hutt, New Zealand, (6)Scripps Institution of Oceanography, La Jolla, United States
The last deglacial retreat history of the East Antarctic Ice Sheet recorded in sediments from off the Wilkes Land Coast (264507)
Masako Yamane1, Yusuke Yokoyama2, Yosuke Miyairi1, Hisami Suga3, Robert B Dunbar4 and Naohiko Ohkouchi3, (1)AORI, The University of Tokyo, Kashiwa-Shi, Chiba, Japan, (2)The University of Tokyo, Atmosphere and Ocean Research Institute, Kashiwa, Japan, (3)JAMSTEC, Yokosuka, Japan, (4)Stanford University, Oceans, Stanford, United States
Thinning History of the Weddell Sea Embayment Using in situ 14C Exposure Ages from the Lassiter Coast (278451)
Keir Alexander Nichols, Tulane University of Louisiana, Department of Earth and Environmental Sciences, New Orleans, United States, Joanne Johnson, British Antarctic Survey, Cambridge, United Kingdom, Brent M Goehring, Tulane University of Louisiana, Department of Earth and Environmental Sciences, New Orleans, LA, United States and Greg Balco, Berkeley Geochronology Center, Berkeley, United States
Chronicling ice shelf history in the sediments left behind (Invited) (258809)
Brad E Rosenheim1, Cristina Subt2, Dr. Amelia Shevenell, Ph.D.3, Michelle Guitard4, Kara Jayne Vadman5, Matthew DeCesare6, Julia Wellner7, Philip J Bart8, Jae IL Lee9, Eugene W Domack10, Kyu-Cheul Yoo9 and John M Hayes11, (1)University of South Florida, College of Marine Science, Saint Petersburg, United States, (2)University of South Florida, College of Marine Science, Saint Petersburg, FL, United States, (3)University of South Florida, Tampa, United States, (4)University of South Florida, Saint Petersburg, FL, United States, (5)University of South Florida, College of Marine Science, Tampa, United States, (6)Louisiana State University, Geology and Geophysics, Baton Rouge, LA, United States, (7)University of Houston, Houston, TX, United States, (8)Department of Geology and Geophysics, Louisiana State University, Baton Rouge, United States, (9)KOPRI Korea Polar Research Institute, Incheon, Korea, Republic of (South), (10)Colgate University, Geology, Hamilton, NY, United States, (11)Organization Not Listed, Washington, DC, United States

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