C018
Holocene to Historical Context of Recent Ice Loss in the Amundsen Sea Embayment and along the West Antarctic Coast

Session ID#: 160759

Session Description:
Sedimentary and geomorphological evidence show that the ice grounding line had already retreated to within 100 km of its present position by the early Holocene in most areas around the Amundsen Sea Embayment. Surface exposure ages from sites around Pine Island Bay record a period of rapid ice surface lowering in the mid Holocene, but little is known about subsequent ice sheet change prior to the initiation of contemporary rapid ice loss in the mid 20th century. Was Holocene retreat gradual or pulsed? Did the ice sheet retreat and thin beyond its current limits and then re-advance, as has been proposed for other sectors? We welcome presentations of results from all types of onshore and offshore studies and models that provide insight on West Antarctic Ice Sheet change through the Holocene and the initiation of contemporary rapid ice loss.
Index Terms:

0726 Ice sheets [CRYOSPHERE]
0730 Ice streams [CRYOSPHERE]
1621 Cryospheric change [GLOBAL CHANGE]
4926 Glacial [PALEOCEANOGRAPHY]

Primary Liaison:  Kelly Hogan, British Antarctic Survey, Cambridge, United Kingdom
Primary Convener:  Kelly Hogan, British Antarctic Survey, Cambridge, United Kingdom
Conveners:  Asmara Lehrmann1, Joanne Johnson2 and Robert D Larter2, (1)University of Alabama, Geological Sciences, Tuscaloosa, United States(2)British Antarctic Survey, Cambridge, United Kingdom
Student/Early Career Convener:  Asmara Lehrmann, University of Alabama, Geological Sciences, Tuscaloosa, United States
 
Reversible ice sheet thinning in the Amundsen Sea Embayment during the Holocene (1076810)
Greg Balco1, Nathan Brown2, Keir Alexander Nichols3, Ryan Venturelli4, Jonathan Adams3, Scott Steven Braddock5, Seth W Campbell6, Brent M Goehring7, Dr. Joanne Johnson8, Dylan H Rood9, Klaus Wilcken10, Brenda L Hall6 and John Woodward11, (1)Berkeley Geochronology Center, Berkeley, United States, (2)University of Texas at Arlington, Arlington, United States, (3)Imperial College London, London, United Kingdom, (4)Colorado School of Mines, Department of Geology and Geological Engineering, Geochemistry Program, Golden, CO, United States, (5)University of Maine, Earth and Climate Sciences and Climate Change Institute, Orono, ME, United States, (6)University of Maine, Earth and Climate Sciences and Climate Change Institute, Orono, United States, (7)Tulane University of Louisiana, Department of Earth and Environmental Sciences, New Orleans, LA, United States, (8)NERC British Antarctic Survey, Cambridge, United Kingdom, (9)Imperial College London, London, SW7, United Kingdom, (10)Australian Nuclear Science and Technology Organization, Kirrawee, NSW, Australia, (11)Northumbria University, Newcastle-Upon-Tyne, United Kingdom
 
The role of Glacial Isostatic Adjustment in controlling ice mass change across West Antarctica (Invited) (1107689)
Pippa Whitehouse, Durham University, Department of Geography, Durham, United Kingdom
 
Relative Sea-Level Data Preclude Major Late Holocene Ice-Mass Change in Pine Island Bay, Antarctica (1110984)
Scott Steven Braddock1, Brenda L Hall2, Dr. Joanne Johnson3, Greg Balco4, Meghan Spoth2, Pippa Whitehouse5, Seth W Campbell2, Brent M Goehring6, Dylan H Rood7 and John Woodward8, (1)University of Maine, Earth and Climate Sciences and Climate Change Institute, Orono, ME, United States, (2)University of Maine, Earth and Climate Sciences and Climate Change Institute, Orono, United States, (3)NERC British Antarctic Survey, Cambridge, United Kingdom, (4)Berkeley Geochronology Center, Berkeley, United States, (5)Durham University, Department of Geography, Durham, United Kingdom, (6)Tulane University of Louisiana, Department of Earth and Environmental Sciences, New Orleans, LA, United States, (7)Imperial College London, London, SW7, United Kingdom, (8)Northumbria University, Newcastle-Upon-Tyne, United Kingdom
 
Ice-sheet modeling to reconcile WAIS deglacial marine and terrestrial records (1117032)
Anna Ruth W Halberstadt1, Greg Balco1, David Pollard2, Robert M Deconto3, Natalya A Gomez4 and Dr. Joanne Johnson5, (1)Berkeley Geochronology Center, Berkeley, United States, (2)Pennsylvania State University, Earth and Environmental Systems Institute, University Park, PA, United States, (3)Univ Massachusetts, Amherst, MA, United States, (4)McGill University, Earth & Planetary Sciences, Montreal, QC, Canada, (5)NERC British Antarctic Survey, Cambridge, United Kingdom
 
Holocene Ice Loss in the Amundsen Sea Embayment Linked to Tropical Pacific Warming (1138434)
Adam Sproson1, Yusuke Yokoyama2, Yosuke Miyairi2, Takahiro Aze2 and Rebecca L Totten3, (1)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, (2)Atmosphere and Ocean Research Institute University of Tokyo, Kashiwa, Japan, (3)University of Alabama, Geological Sciences, Tuscaloosa, AL, United States
 
Beyond the wall: Diverse outcomes associated with climate driven ice sheet retreat in the Amundsen Sea Embayment (1153329)
Jeremy N Bassis and Samuel Benjamin Kachuck, University of Michigan Ann Arbor, Climate and Space Sciences and Engineering, Ann Arbor, MI, United States
 
Grounding-Zone Retreat and Marine Sediment Transport from Holocene to Present along Thwaites Glacier in the Eastern Amundsen Sea (Invited) (1169991)
Rachel Warren Clark1, Julia Wellner1, Claus-Dieter Hillenbrand2, Rebecca L Totten3, Asmara Lehrmann4, Victoria Fitzgerald4, James A Smith2, Laura Barnett5, Michael Michael Comas1, Georgina Garcia-Barrera6, Mary Catherine Hambrick6, Becky Hopkins7, James Kirkham8, Allison Lepp9, James Marschalek10, Elaine Mawbey2, Santiago Munevar Garcia11, John B Anderson12, Julia Villafranca6, Alastair GC Graham13, Kelly Hogan2, Robert D Larter2, Frank Oliver Nitsche14, Lauren Miller Simkins11 and Lukas Wacker15, (1)University of Houston, Houston, TX, United States, (2)NERC British Antarctic Survey, Cambridge, United Kingdom, (3)University of Alabama, Geological Sciences, Tuscaloosa, AL, United States, (4)University of Alabama, Geological Sciences, Tuscaloosa, United States, (5)Woods Hole Oceanographic Institution, Woods Hole, United States, (6)University of Houston, Houston, United States, (7)University of Southampton, Southampton, United Kingdom, (8)University of Cambridge, Cambridge, United Kingdom, (9)University of Virginia, Department of Environmental Sciences, Charlottesville, VA, United States, (10)Imperial College London, London, United Kingdom, (11)University of Virginia, Department of Environmental Sciences, Charlottesville, United States, (12)Rice University, Department of Earth, Environmental and Planetary Sciences, Houston, United States, (13)University of South Florida St. Petersburg, St Petersburg, FL, United States, (14)Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States, (15)ETH Swiss Federal Institute of Technology Zurich, Laboratory for Ion Beam Physics, Department of Physics, Zurich, Switzerland
 
A Potential Benthic Source of Nutrient Iron Driving Productivity in the Amundsen Sea in the Context of Current and Past Glacial Retreat (1173253)
Lisa Herbert, Rutgers University New Brunswick, New Brunswick, NJ, United States, Allison Lepp, University of Virginia, Department of Environmental Sciences, Charlottesville, VA, United States, Lauren Miller Simkins, University of Virginia, Department of Environmental Sciences, Charlottesville, United States, Julia Wellner, University of Houston, Houston, TX, United States, Claus-Dieter Hillenbrand, British Antarctic Survey, Cambridge, United Kingdom, Dr. Joanne Johnson, NERC British Antarctic Survey, Cambridge, United Kingdom, Silke Severmann, Rutgers University, Department of Marine & Coastal Sciences, New Brunswick, NJ, United States and Robert M Sherrell, Rutgers University, Departments of Marine and Coastal Sciences and Earth and Planetary Sciences, New Brunswick, NJ, United States
 
Grounding-Zone Wedges, Till Sheets and Sediment Fluxes in Anvers-Hugo Trough: A Detailed Record of Ice-Stream Retreat Behaviour on the Western Antarctic Peninsula (1173385)
Kelly Hogan1, Robert D Larter1, James Smith1, Claus-Dieter Hillenbrand1, Zoe A Roseby2, Christine Batchelor3 and Julian A. Dowdeswell4, (1)British Antarctic Survey, Cambridge, United Kingdom, (2)Trinity College Dublin, Department of Geology, Dublin, Ireland, (3)Newcastle University, Tyne and Wear, United Kingdom, (4)Scott Polar Research Institute, University of Cambridge, Cambridge, United Kingdom
 
Sedimentary Record of Pre-Satellite Retreat of Pine Island Glacier, Amundsen Sea, Antarctica (1185504)
Michael Michael Comas1, Julia Wellner1, Claus-Dieter Hillenbrand2, Rachel Warren Clark1, James Smith2, Robert D Larter2, Alastair GC Graham3, Kelly Hogan2, Frank Oliver Nitsche4, Rebecca L Totten5, John B Anderson6, Lauren Miller Simkins7, Asmara Lehrmann8, Allison Lepp9, Elaine Mawbey10, Becky Hopkins10 and James Marschalek11, (1)University of Houston, Houston, TX, United States, (2)British Antarctic Survey, Cambridge, United Kingdom, (3)University of South Florida St. Petersburg, St Petersburg, FL, United States, (4)Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States, (5)University of Alabama, Geological Sciences, Tuscaloosa, AL, United States, (6)Rice University, Department of Earth, Environmental and Planetary Sciences, Houston, United States, (7)University of Virginia, Department of Environmental Sciences, Charlottesville, United States, (8)University of Alabama, Geological Sciences, Tuscaloosa, United States, (9)University of Virginia, Department of Environmental Sciences, Charlottesville, VA, United States, (10)NERC British Antarctic Survey, Cambridge, United Kingdom, (11)Imperial College London, London, United Kingdom
 
New GNSS Observations of Crustal Deformation due to Ice Mass Loss in the Amundsen Sea Region (1186181)
Terry J Wilson1, Michael G Bevis1, William Durkin IV1, Demian Gomez1, Eric C Kendrick1, Stephanie Ann Konfal1, Peter Matheny1, David Michael Saddler1, Robert Smalley Jr2, Ian W D Dalziel3 and ANET_POLENET Team, (1)Ohio State University, Columbus, United States, (2)University of Memphis, Center for Earthquake Research and Information, Memphis, TN, United States, (3)University of Texas at Austin, Institute for Geophysics, Austin, TX, United States
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