C006
Arctic and Antarctic subglacial environments: Bridging the gap between modern observations and paleoclimate records

Session ID#: 77589

Session Description:
Interconnected physical and geobiological systems in the subglacial environment modulate modern ice-sheet processes and leave an imprint on the sedimentary archive of paleo-ice-sheet behavior. A holistic view of the extent, magnitude, and timescale of glaciological, geochemical, geomorphic, hydrological, and geobiological processes can help refine our quantification of past, present, and future ice-sheet state. This session aims to bring together studies from a variety of fields to explore how modern observations and models of sub-ice systems can improve our interpretation of paleoclimate records and how inferences from paleoclimate records can help contextualize the relevance and magnitude of modern sub-ice processes. We encourage contributions that cover a wide-range of methods, including direct borehole sampling, in situ and remote geophysical observation, laboratory experiments, sedimentological analysis, biogeochemical studies, geochronological surveys, and modeling studies, in order to improve our collective process-to-paleo perspective.
Index Terms:

0448 Geomicrobiology [BIOGEOSCIENCES]
0473 Paleoclimatology and paleoceanography [BIOGEOSCIENCES]
0776 Glaciology [CRYOSPHERE]
0793 Biogeochemistry [CRYOSPHERE]

Primary Convener:  Ryan Venturelli, University of South Florida, College of Marine Science, Tampa, FL, United States
Conveners:  Chloe Gustafson, Lamont-Doherty Earth Observatory, Palisades, NY, United States, Alexander B Michaud, Bigelow Laboratory for Ocean Sciences, East Boothbay, ME, United States and Matthew R Siegfried, Colorado School of Mines, Department of Geophysics, Golden, CO, United States
Primary Liaison:  Matthew R Siegfried, Colorado School of Mines, Department of Geophysics, Golden, CO, United States
 
Paleo Observations Used to Geostatistically Simulate the Subglacial Geology of Thwaites Glacier (485553)
Emma Mackie, Stanford University, Department of Geophysics, Stanford, CA, United States and Dustin M Schroeder, Stanford University, Department of Geophysics, Department of Electrical Engineering, Stanford, CA, United States
 
Radiometric signature of subglacial conditions in archival radar sounding data recovered from optical film (487469)
Dustin M Schroeder1, Emma Mackie2 and Annabel Conger2, (1)Stanford University, Department of Geophysics, Department of Electrical Engineering, Stanford, CA, United States, (2)Stanford University, Department of Geophysics, Stanford, CA, United States
 
Modeling 2.7 Million years of Greenland ice sheet fluctuations using high Arctic temperature reconstructions (Invited) (490157)
Benjamin Andrew Keisling1, Julie Brigham-Grette2, Isla S. Castañeda1, William Daniels3, Helen Habicht1 and Rob DeConto4, (1)UMass Amherst-Geosciences, Amherst, MA, United States, (2)Univ Massachusetts, Amherst, MA, United States, (3)University of Massachusetts Amherst, Department of Geosciences, Amherst, MA, United States, (4)University of Massachusetts Amherst, Amherst, MA, United States
 
The impact of glacial lake outburst flood events on mineral weathering in a high arctic watershed (Invited) (493694)
Emily Stevenson1, Melissa J Murphy2, Katy Relph3, Edward Tipper3, Alexandra v Turchyn1 and Philip Pogge von Strandmann2, (1)University of Cambridge, Cambridge, United Kingdom, (2)University College London, London, United Kingdom, (3)University of Cambridge, Department of Earth Sciences, Cambridge, United Kingdom
 
METEORIC 10BE AS A TRACER FOR SUBGLACIAL CHEMICAL WEATHERING IN EAST ANTARCTICA (495102)
Eiríka Arnardóttir1, Joseph A Graly1, Kathy Licht1 and Marc Caffee2, (1)IUPUI, Earth Sciences, Indianapolis, IN, United States, (2)Purdue University, West Lafayette, IN, United States
 
Using quantitative data from modern day glaciers to reconstruct Quaternary subglacial till erosion and sedimentation. (501178)
Jane K Hart, University of Southampton, Southampton, SO14, United Kingdom and Kirk Martinez, University of Southampton, Electronics and Computer Science, Southampton, SO14, United Kingdom
 
Apatite (U-Th)/He thermochronometric data show rapid late Eocene incision in the central Transantarctic Mountains (507577)
John He1,2, Stuart N Thomson3 and Peter W Reiners1, (1)University of Arizona, Tucson, AZ, United States, (2)University of Minnesota, Minneapolis, MN, United States, (3)University of Arizona, Department of Geosciences, Tucson, AZ, United States
 
Deep glacial troughs and stabilizing ridges hidden beneath the ice around the coast of Antarctica (515095)
Mathieu Morlighem1, Eric J Rignot2, Tobias Binder3, Donald D Blankenship4, Reinhard Drews5, Graeme Eagles6, Olaf Eisen7, Fausto Ferraccioli8, Rene Forsberg9, Peter Fretwell8, Vikram Goel10, Gudmundur Hilmar Gudmundsson11, Veit Helm6, Coen M Hofstede12, Angelika Humbert6, Wilfried Jokat6, Nanna B. Karlsson13, Kenichi Matsuoka14, Romain Millan15, Jeremie Mouginot2, John Drysdale Paden16, Frank Pattyn17, Jason L Roberts18, Sebastian Harry Reid Rosier19, Antonia Stefanie Ruppel20, Helene L Seroussi21, Emma C Smith12, Daniel Steinhage6, Michiel R van den Broeke22, Tas D van Ommen18, Melchoir Van Wessem23, Duncan A Young24 and Sun Bo25, (1)University of California Irvine, Irvine, CA, United States, (2)University of California Irvine, Department of Earth System Science, Irvine, CA, United States, (3)Alfred Wegener Inst, Bremenhaven, Germany, (4)University of Texas, Institute for Geophysics, Austin, TX, United States, (5)University of Bremen, Bremen, Germany, (6)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (7)University of Bremen, Department of Geosciences, Bremen, Germany, (8)NERC British Antarctic Survey, Cambridge, United Kingdom, (9)Technical University of Denmark - Space, Kongens Lyngby, Denmark, (10)NATIONAL CENTRE FOR POLAR AND OCEAN RESEARCH, Goa, India, (11)Northumbria University, Geography and Environmental Sciences, Newcastle-Upon-Tyne, United Kingdom, (12)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research (AWI), Division of Geosciences, Bremerhaven, Germany, (13)University of Copenhagen, Copenhagen, Denmark, (14)Norwegian Polar Institute, Tromsø, Norway, (15)University of Grenoble Alpes, Grenoble, France, (16)University of Kansas, Lawrence, United States, (17)Université Libre de Bruxelles, Brussel, Belgium, (18)Australian Antarctic Division, Kingston, Australia, (19)Northumbria University, Newcastle, United Kingdom, (20)BGR Federal Institute for Geosciences and Natural Resources, Hannover, Germany, (21)NASA Jet Propulsion Laboratory, Pasadena, CA, United States, (22)Utrecht University, Institute for Marine and Atmospheric Research Utrecht, Utrecht, Netherlands, (23)Utrecht University, Utrecht, Netherlands, (24)Institute for Geophysics, Austin, TX, United States, (25)Polar Research Institute of China, Shanghai, China
 
Using QEMSCAN data to elucidate chemical and physical controls on subglacial silt and clay production (519610)
Jeff W Crompton, Simon Fraser University, Burnaby, BC, Canada and Gwenn E Flowers, Simon Fraser University, Department of Earth Sciences, Burnaby, BC, Canada
 
Carbon feedbacks under the Greenland Ice Sheet and implications for greenhouse gas exchange (519678)
Andrea Pain1, Jonathan B. Martin1, Ellen E Martin1 and Shaily Rahman2, (1)University of Florida, Geological Sciences, Gainesville, FL, United States, (2)University of Florida, Geological Sciences, Ft Walton Beach, FL, United States
 
Evidence for Major Miocene/Pliocene Glacial Incision in the Erosional History of Wilkes Subglacial Basin (520026)
Sam Kodama, Columbia University of New York, New York City, NY, United States, Stephen E Cox, Caltech, Pasadena, CA, United States, Sidney R Hemming, Lamont-Doherty Earth Observ, Palisades, NY, United States, Peter W Reiners, University of Arizona, Tucson, AZ, United States, Stuart N Thomson, University of Arizona, Department of Geosciences, Tucson, AZ, United States and Kathy Licht, IUPUI, Earth Sciences, Indianapolis, IN, United States
 
Apatite (U-Th)/He Evidence for Exhumation along the Shackleton Glacier in the Central Transantarctic Mountains (520482)
Bailey J Nordin, Columbia University, New York, NY, United States, Stephen E Cox, Caltech, Pasadena, CA, United States, Sidney R Hemming, Lamont-Doherty Earth Observ, Palisades, NY, United States, Stuart N Thomson, University of Arizona, Department of Geosciences, Tucson, AZ, United States, Peter W Reiners, University of Arizona, Tucson, AZ, United States and Kathy Licht, IUPUI, Earth Sciences, Indianapolis, IN, United States
 
ICI-Hot project: Timing of development of West Antarctica's subglacial topography evaluated using apatite and zircon double/triple-dating (527840)
Christine S Siddoway1, Stuart N Thomson2, Jennifer Margaret Taylor3, Carson Kinney4, Christian Teyssier3 and Chris Yakymchuk5, (1)Colorado College, Colorado Springs, CO, United States, (2)University of Arizona, Department of Geosciences, Tucson, AZ, United States, (3)University of Minnesota Twin Cities, Department of Earth and Environmental Sciences, Minneapolis, MN, United States, (4)University of Waterloo, Earth and Environmental Sciences, Waterloo, ON, Canada, (5)University of Maryland College Park, College Park, MD, United States
 
Spatial distribution of englacial layer slope as a constraint on ice sheet basal conditions (560807)
Elisa Mantelli1, Marnie Bryant2, Dustin M Schroeder3, Jenny Suckale2, Davide Castelletti4, Ludovic Räss5, Helene L Seroussi6 and Martin J Siegert7, (1)Princeton University, Princeton, NJ, United States, (2)Stanford University, Stanford, CA, United States, (3)Stanford University, Department of Geophysics, Department of Electrical Engineering, Stanford, CA, United States, (4)Stanford University, Geophysics, Stanford, CA, United States, (5)Stanford Earth Sciences, Stanford, CA, United States, (6)NASA Jet Propulsion Laboratory, Pasadena, CA, United States, (7)Imperial College London, London, United Kingdom
 
Physical and chemical characterization of sediments from Mercer Subglacial Lake, West Antarctica (597475)
Timothy Campbell, Montana State University, Earth Sciences, Bozeman, MT, United States, Molly O'Rourke Patterson, Binghamton University, Binghamton, NY, United States, Mark L Skidmore, Montana State Univ, Earth Sciences, Bozeman, MT, United States, Amy Leventer, Colgate University, Geology, Hamilton, NY, United States, Alexander B Michaud, Montana State University, Bozeman, MT, United States, Brad E Rosenheim, University of South Florida St. Petersburg, College of Marine Science, St Petersburg, FL, United States, David M Harwood, University of Nebraska Lincoln, Lincoln, NE, United States, John E Dore, Montana State University, Land Resources and Environmental Sciences, Bozeman, MT, United States, Martyn Tranter, University of Bristol, School of Geographical Sciences, Bristol, United Kingdom, Ryan Venturelli, University of South Florida, St Petersburg, United States, John C Priscu, Montana State University, Land Resources and Environmental Science, Bozeman, MT, United States and the SALSA Science Team
 
Hydrogen and methane production from silicate minerals in laboratory experiments simulating subglacial environmental conditions (612091)
LeaAnne Harbour1, Mark L Skidmore2, K Rebecca Mitchell3, John E Dore4 and Christopher Allen3, (1)Montana State University, Bozeman, MT, United States, (2)Montana State Univ, Earth Sciences, Bozeman, MT, United States, (3)Montana State University, Bozeman, United States, (4)Montana State University, Land Resources and Environmental Sciences, Bozeman, MT, United States
 
Pervasive subglacial brines could explain discrepancies in Greenland geophysical data (612733)
Joseph A Graly, Indiana University Purdue University Indianapolis, Indianapolis, IN, United States and Soroush Rezvanbehbahani, University of Kansas, Department of Geology, Lawrence, KS, United States
 
A tale of two lakes – contrasting weathering regimes in proximal subglacial Antarctic systems (621636)
Mark L Skidmore1, Christopher B Gardner2, August Steigmeyer1, Matthew R Siegfried3, Joel D Barker4, John E Dore5, Beatriz Gill Olivas6, Jon Hawkings7, William B Lyons8, Martyn Tranter9, John C Priscu10 and SALSA Science Team, (1)Montana State University, Bozeman, MT, United States, (2)Ohio State University, School of Earth Sciences, Columbus, OH, United States, (3)Stanford University, Department of Geophysics, Stanford, CA, United States, (4)Ohio State University, Columbus, OH, United States, (5)Montana State University, Land Resources and Environmental Sciences, Bozeman, MT, United States, (6)School of Geographical Sciences, University of Bristol, Bristol, United Kingdom, (7)University of Bristol, Bristol, BS8, United Kingdom, (8)Ohio State Univ, Columbus, OH, United States, (9)University of Bristol, School of Geographical Sciences, Bristol, United Kingdom, (10)Montana State University, Land Resources and Environmental Science, Bozeman, MT, United States
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