C024
Holocene Changes in Antarctic Ice Sheet Behavior I eLightning

Wednesday, 9 December 2020: 05:30-06:30
Virtual
Primary Convener:  Alastair GC Graham, University of South Florida St. Petersburg, St Petersburg, FL, United States
Conveners:  Joanne Johnson, NERC British Antarctic Survey, Cambridge, United Kingdom, Keir Alexander Nichols, Tulane University of Louisiana, Department of Earth and Environmental Sciences, New Orleans, LA, United States and Rachel Warren Clark, University of Houston, Houston, TX, United States
Primary Liaison:  Alastair GC Graham, University of South Florida St. Petersburg, St Petersburg, FL, United States
Chairs:  Joanne Johnson, UMass Amherst-Geosciences, Amherst, United States, Alastair GC Graham, University of South Florida St. Petersburg, St Petersburg, FL, United States, Rachel Warren Clark, Bryn Mawr College, Bryn Mawr, PA, United States and Keir Alexander Nichols, Tulane University of Louisiana, Department of Earth and Environmental Sciences, New Orleans, LA, United States
OSPA Liaison:  Alastair GC Graham, University of South Florida St. Petersburg, St Petersburg, FL, United States
05:30
Welcoming Remarks
05:31
Antarctic Ice Sheet sensitivity to environmental forcing in the Holocene (Invited) (665380)
Daniel Lowry1, Nicholas R Golledge2 and Mario Krapp1, (1)GNS Science, Lower Hutt, New Zealand, (2)Victoria University of Wellington, Antarctic Research Centre, Wellington, New Zealand
05:34
Early- to mid-Holocene ice sheet thinning in the Pine Island-Thwaites Glacier catchment of West Antarctica: glacial-geological observations and modeling (692902)
David Pollard1, Joanne Johnson2, Stephen J Roberts2, Dylan H Rood3, Joerg Schaefer4, Pippa Whitehouse5, Brent M Goehring6, Louise Ireland2, Jennifer L Lamp7, Cari Rand8 and James Smith9, (1)Pennsylvania State University Main Campus, University Park, PA, United States, (2)NERC British Antarctic Survey, Cambridge, United Kingdom, (3)Imperial College London, London, SW7, United Kingdom, (4)Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, 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)Lamont-Doherty Earth Observatory, Palisades, NY, United States, (8)Tulane University of Louisiana, New Orleans, LA, United States, (9)British Antarctic Survey, Cambridge, United Kingdom
05:37
Age-Depth Stratigraphy of Pine Island Glacier Inferred from Airborne Radars and Ice-Core Chronology (736823)
Julien Bodart, University of Edinburgh, School of GeoSciences, Edinburgh, United Kingdom, Robert G. Bingham, University of Edinburgh, School of GeoSciences, Edinburgh, EH9, United Kingdom, David W Ashmore, University of Liverpool, School of Environmental Sciences, Liverpool, United Kingdom, Nanna B Karlsson, Senior Scientist, Copenhagen, Denmark, Andrew Hein, University of Edinburgh, Edinburgh, United Kingdom and David G Vaughan, NERC British Antarctic Survey, Cambridge, United Kingdom
05:40
On the origin and cycling of Holocene-aged carbon beneath the West Antarctic Ice Sheet (707946)
Ryan Venturelli1, Christina Davis2, Trista Vick-Majors3, Wei Li4, Matthew Siegfried5, Joel D Barker6, Amy Leventer7, David M Harwood8, Brent Christner2, Helen Amanda Fricker9, John C Priscu4, Brad E Rosenheim10 and SALSA Science Team, (1)University of South Florida, College of Marine Science, Tampa, FL, United States, (2)University of Florida, Microbiology and Cell Science, Ft Walton Beach, FL, United States, (3)Michigan Technological University, Biological Sciences, Houghton, MI, United States, (4)Montana State University, Land Resources and Environmental Science, Bozeman, MT, United States, (5)Colorado School of Mines, Geophysics, Golden, CO, United States, (6)University of Minnesota, Minneapolis, MN, United States, (7)Colgate University, Geology, Hamilton, NY, United States, (8)University of Nebraska Lincoln, Lincoln, NE, United States, (9)Scripps Institution of Oceanography, La Jolla, CA, United States, (10)University of South Florida St. Petersburg, College of Marine Science, St Petersburg, FL, United States
05:43
Mid-Holocene Retreat and Late Holocene Re-advance of the Grounding Line in the Ross Sea Sector (704064)
Sarah Neuhaus, University of California Santa Cruz, Earth and Planetary Sciences, Santa Cruz, CA, United States, Slawek M Tulaczyk, Univ California Santa Cruz, Earth and Planetary Sciences, Santa Cruz, CA, United States, Nathan Stansell, Northern Illinois University, Geology and Environmental Geosciences, Dekalb, IL, United States, Jason James Coenen, Northern Illinois University, DeKalb, IL, United States, Ryan Venturelli, University of South Florida, St Petersburg, United States, Reed P Scherer, Northern Illinois Univ, De Kalb, IL, United States, Jill Mikucki, University of Tennessee, Department of Microbiology, Knoxville, TN, United States, Brad E Rosenheim, University of South Florida St. Petersburg, College of Marine Science, St Petersburg, FL, United States and Ross D Powell, Northern Illinois Univ., Geology and Environmental Geosciences, De Kalb, IL, United States
05:46
Ocean-driven and topography-controlled nonlinear glacier retreat during the Holocene: southwestern Ross Sea, Antarctica (724599)
Richard Selwyn Jones1, Gudmundur Hilmar Gudmundsson2, Andrew Mackintosh1 and Ross Whitmore1, (1)Monash University, School of Earth, Atmosphere and Environment, Melbourne, VIC, Australia, (2)Northumbria University, Geography and Environmental Sciences, Newcastle-Upon-Tyne, United Kingdom
05:49
Controls on Mid-Holocene Thinning along David Glacier, Antarctica (707633)
Jamey Stutz1, Andrew Mackintosh2, Kevin P Norton3, Ross Whitmore2, Stewart Jamieson4 and Richard S Jones2, (1)Victoria University of Wellington, Antarctic Research Centre, Wellington, New Zealand, (2)Monash University, School of Earth, Atmosphere and Environment, Melbourne, VIC, Australia, (3)Victoria University of Wellington, School of Geography, Environment and Earth Sciences, Wellington, New Zealand, (4)Durham University, Department of Geography, Durham, United Kingdom
05:52
Assimilating glaciological and geochronological data into ice-flow models to constrain the deglaciation of Beardmore Glacier, Transantarctic Mountains (738452)
Michelle R Koutnik1, Trevor Hillebrand2, Howard Conway1, Ben Smith3, John Stone1 and Perry E Spector4, (1)University of Washington, Department of Earth and Space Sciences, Seattle, WA, United States, (2)Los Alamos National Laboratory, Los Alamos, NM, United States, (3)University of Washington, Applied Physics Laboratory, Seattle, WA, United States, (4)University of California Berkeley, Berkeley, CA, United States
05:55
Holocene Ice-Elevation and Extent Changes at Roberts Massif, Central Transantarctic Mountains (737847)
Margaret S Jackson1, Gordon R Bromley1,2, Greg Balco3, Alexandra Balter-Kennedy4,5 and Holly Thomas2, (1)National University of Ireland Galway, Geography, Galway, Ireland, (2)University of Maine, Earth and Climate Sciences and Climate Change Institute, Orono, ME, United States, (3)Berkeley Geochronology Center, Berkeley, CA, United States, (4)Lamont -Doherty Earth Observatory, Earth and Climate Sciences, Palisades, ME, United States, (5)University of Maine, Earth and Climate Sciences, Orono, ME, United States
05:58
Inferring Holocene variations in ice-flow patterns and accumulation gradients at Hercules Dome from radar measurements of internal layering and englacial velocity profiles with 2D ice-flow modeling (716077)
Tyler J Fudge1, Andrew Osten Hoffman1, Annika Noel Horlings1, Benjamin H Hills2, Eric J. Steig1, Gemma K. O'Connor1, John Erich Christian1, Knut A Christianson1, Lindsey Davidge1 and Nicholas Holschuh1, (1)University of Washington, Earth and Space Sciences, Seattle, WA, United States, (2)University of Montana, Missoula, MT, United States
06:01
Applications of in situ 14C to ice thickness changes in western Dronning Maud Land, East Antarctica (Invited) (667669)
Sarah Sams1, Nathaniel A Lifton1, Jane Lund Andersen2, Jennifer Newall3, Robin Blomdin3,4, Derek Fabel5, Ola Fredin6, Neil F Glasser7, Jon Harbor8, Alexandria Koester1, Arjen P Stroeven3, Marc Caffee9, Brent M Goehring10 and Keir Alexander Nichols10, (1)Purdue University, Department of Earth, Atmospheric, and Planetary Sciences, West Lafayette, IN, United States, (2)Aarhus University, Department of Geoscience, Aarhus, Denmark, (3)Stockholm University, Department of Physical Geography, Stockholm, Sweden, (4)Geological Survey of Sweden, Department of Physical Planning, Uppsala, Sweden, (5)Scottish Universities Environmental Research Center, East Kilbride, United Kingdom, (6)Norwegian University of Science and Technology, Department of Geography, Trondheim, Norway, (7)Aberystwyth University, Department of Geography and Earth Sciences, Aberystwyth, United Kingdom, (8)Purdue University Global, West Lafayette, IN, United States, (9)Purdue University, Purdue Rare Isotope Measurement Laboratory, West Lafayette, IN, United States, (10)Tulane University of Louisiana, Department of Earth and Environmental Sciences, New Orleans, LA, United States
06:04
Discussion
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