C013
Merging Ice Sheet and Climate Reconstructions with Numerical Models to Understand the Mechanisms and Rates of Ice-Sheet Change

Session ID#: 81797

Session Description:
A complete understanding of the mechanisms and rates of ice-sheet change over multiple timescales requires direct observations, paleo ice-margin reconstructions, records of modern and paleoclimate in ice-sheet settings, and numerical modeling efforts. Often these ingredients are generated and interpreted independently and this separation fundamentally limits our understanding of how ice sheets evolve over multiple timescales. Here, we aim to bring together those working on any and all of these components to better understand the mechanisms and rates of ice-sheet change. We particularly encourage submissions where observations or paleo-reconstructions of ice-sheet change are explicitly merged with numerical modeling to develop a holistic view of the factors driving ice-sheet evolution. In addition, we encourage submissions where records of modern or paleoclimate change in ice sheet settings are being developed, synthesized, and/or assimilated into numerical modeling efforts. All ice sheets, modern and paleo, are welcome.
Index Terms:

0726 Ice sheets [CRYOSPHERE]
0798 Modeling [CRYOSPHERE]
1616 Climate variability [GLOBAL CHANGE]
1621 Cryospheric change [GLOBAL CHANGE]


Primary Convener:  Nicolas E Young, Lamont -Doherty Earth Observatory, Palisades, NY, United States
Conveners:  Elizabeth K Thomas, University at Buffalo, Department of Geology, Buffalo, NY, United States, Joshua K Cuzzone, NASA Jet Propulsion Laboratory, Pasadena, CA, United States and Eric J. Steig, University of Washington, Seattle, WA, United States
Primary Liaison:  Nicolas E Young, Lamont Doherty Earth Observatory, Palisades, NY, United States
 
Breaking the ice: major Laurentide ice sheet control on ocean circulation and climate during the last 21 ka (Invited) (489433)
Ruza F Ivanovic, University of Leeds, School of Earth and Environment, Leeds, LS2, United Kingdom, Lauren J Gregoire, University of Bristol, Bristol, United Kingdom, Andrew D Wickert, University of Minnesota, Department of Earth & Environmental Sciences and Saint Anthony Falls Laboratory, Minneapolis, MN, United States, Paul J Valdes, University of Bristol, Bristol, BS8, United Kingdom, Ilkka Matero, Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany and Andrea Burke, University of St. Andrews, School of Earth and Environmental Sciences, St. Andrews, United Kingdom
 
Greenland Ice Sheet mass loss rate will exceed Holocene values this century (493179)
Jason P Briner1, Joshua K Cuzzone2, Jessica Badgeley3, Estelle Allan4, Ole Bennike5, Allison Cluett6, Beata M Csatho1, Anne de Vernal7, Jacob Downs8, Gregory J. Hakim9, Jesse V Johnson8, Eric Y Larour10, Alia J Lesnek6, Mathieu Morlighem11, Sophie Nowicki12, Joerg Schaefer13, Nicole Schlegel2, Eric J. Steig3, Elizabeth K Thomas1 and Nicolas E. Young14, (1)University at Buffalo, Department of Geology, Buffalo, NY, United States, (2)NASA Jet Propulsion Laboratory, Pasadena, CA, United States, (3)University of Washington, Seattle, WA, United States, (4)GEOTOP-UQAM, Montreal, QC, Canada, (5)GEUS, Copenhagen, Denmark, (6)University at Buffalo, Buffalo, NY, United States, (7)Univ Quebec Montreal, Montréal, QC, Canada, (8)University of Montana, Missoula, MT, United States, (9)University of Washington, Department of Atmospheric Sciences, Seattle, WA, United States, (10)Jet Propulsion Laboratory, Pasadena, CA, United States, (11)University of California - Irvine, Irvine, CA, United States, (12)NASA GSFC, Greenbelt, MD, United States, (13)Columbia University, Lamont-Doherty Earth Observatory, New York, NY, United States, (14)Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States
 
Late Ordovician ice stream in NE Africa and Arabia and its implication (494955)
Mohamed Samy Elhebiry1,2, Mohamed Sultan1 and Alan Kehew1, (1)Western Michigan University, Department of Geological and Environmental Sciences, Kalamazoo, MI, United States, (2)Al-Azhar University, Geology Department, Cairo, Egypt
 
Constraining periods of reduced Greenland Ice Sheet extent using in situ 10Be-14C-26Al measurements in recently exposed bedrock surfaces (495310)
Nicolas E Young, Lamont -Doherty Earth Observatory, Palisades, NY, United States, Jason P Briner, University at Buffalo, Department of Geology, Buffalo, NY, United States, Alia J Lesnek, University at Buffalo, Buffalo, NY, United States, Alexandra Balter, Columbia University, New York, NY, United States, Brandon Grahm, University at Buffalo, Buffalo, United States and Joerg M Schaefer, Lamont-Doherty Earth Observ, Palisades, NY, United States
 
Simulations of Northern Hemispheric Quaternary glacial-interglacial cycles with a coupled ice sheet-lake-sediment model (499409)
David Pollard, Pennsylvania State University Main Campus, University Park, PA, United States and Robert M Deconto, Univ Massachusetts, Amherst, MA, United States
 
Investigating the role climate reconstructions play in the simulated retreat history of southwestern Greenland during the Holocene using the Ice Sheet System Model (ISSM). (507946)
Joshua K Cuzzone, University of California - Irvine, Pasadena, CA, United States, Mathieu Morlighem, University of California - Irvine, Irvine, CA, United States, Nicole Schlegel, NASA Jet Propulsion Laboratory, Pasadena, CA, United States, Eric Y Larour, Jet Propulsion Laboratory, Pasadena, CA, United States, Jason P Briner, University at Buffalo, Department of Geology, Buffalo, NY, United States, Nicolas E. Young, Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States, Alia Lesnek, University of Buffalo, Department of Geology, Buffalo, United States, Jessica Badgeley, University of Washington, Department of Earth and Space Sciences, Seattle, WA, United States, Eric J. Steig, University of Washington, Seattle, WA, United States and Gregory J. Hakim, University of Washington, Department of Atmospheric Sciences, Seattle, WA, United States
 
A Dynamic Holocene Grounding Line: In situ sedimentary evidence from Whillans and Mercer ice streams, West Antarctica (529024)
Ryan Venturelli, University of South Florida, College of Marine Science, Tampa, FL, United States, Brad E Rosenheim, University of South Florida St. Petersburg, College of Marine Science, St Petersburg, FL, United States, Amy Leventer, Colgate University, Geology, Hamilton, NY, United States, David M Harwood, University of Nebraska Lincoln, Lincoln, NE, United States, Molly O'Rourke Patterson, Binghamton University, Binghamton, NY, United States, Timothy Campbell, Montana State University, Earth Sciences, Bozeman, MT, United States, Matthew R Siegfried, Stanford University, Department of Geophysics, Stanford, CA, United States, Helen Amanda Fricker, Scripps Institution of Oceanography, La Jolla, CA, United States and SALSA and WISSARD Science Teams
 
Simulations of dated radiostratigraphy for the Greenland ice sheet (531518)
Andreas Born, University of Bergen, Department of Earth Science, Bergen, Norway; Bjerknes Centre for Climate Research, Bergen, Norway and Alexander Robinson, Complutense University of Madrid, Madrid, Spain; Geosciences Institute, CSIC-UCM, Madrid, Spain
 
Saddle Collapse of the Eurasian Ice Sheet in the North Sea caused by combined ice flow, surface melt and marine ice sheet instabilities (537116)
Niall Gandy, University of Leeds, Leeds, LS2, United Kingdom, Lauren J Gregoire, University of Leeds, School of Earth and Environment, Leeds, United Kingdom, Jeremy Ely, University of Sheffield, Sheffield, United Kingdom, Stephen L. Cornford, University of Swansea, Swansea, United Kingdom, Chris Clark, Univ Sheffield, Sheffield, United Kingdom and David Hodgson, University of Leeds, School of Earth & Environment, Leeds, United Kingdom
 
Maximum Southwest Greenland Ice Sheet Recession in the Early Holocene (549121)
Alia J Lesnek, University at Buffalo, Buffalo, NY, United States, Jason P Briner, University at Buffalo, Department of Geology, Buffalo, NY, United States, Nicolas E. Young, Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States and Joshua K Cuzzone, NASA Jet Propulsion Laboratory, Pasadena, CA, United States
 
Reanalysis of Greenland temperature and precipitation over the last 20,000 years using data assimilation (549938)
Jessica Badgeley, University of Washington, Department of Earth and Space Sciences, Seattle, WA, United States, Eric J. Steig, University of Washington, Seattle, WA, United States, Gregory J. Hakim, University of Washington, Department of Atmospheric Sciences, Seattle, WA, United States and T. J. Fudge, University of Washington, Earth and Space Sciences, Seattle, WA, United States
 
Retreat of the Greenland Ice Sheet During the Last Interglacial (552722)
Aleah Sommers1, Bette L Otto-Bliesner1, William Lipscomb2, Patrick J Bartlein3, Sarah L Shafer4, Marcus Lofverstrom5, Robert A Tomas6, Esther C Brady7, Gunter Leguy2 and Katherine Thayer-Calder2, (1)National Center for Atmospheric Research, Climate and Global Dynamics Laboratory, Boulder, CO, United States, (2)National Center for Atmospheric Research, Boulder, CO, United States, (3)University of Oregon, Geography, Eugene, OR, United States, (4)US Geological Survey, Corvallis, OR, United States, (5)University of Arizona, Tucson, AZ, United States, (6)NCAR, Boulder, CO, United States, (7)National Center for Atmospheric Research, Boulder, Boulder, CO, United States
 
Synoptic evaluation of long-term Antarctic ice-sheet model simulations using a continent-wide database of cosmogenic-nuclide measurements (555575)
Perry E Spector and Greg Balco, Berkeley Geochronology Center, Berkeley, CA, United States
 
Ice Sheet-Moderated Changes in the Precipitation Isotope Climatology of NW Canada during the Late Deglacial (556697)
Spruce W Schoenemann, The University of Montana Western, Environmental Sciences, Dillon, MT, United States, Jesse M Nusbaumer, National Center for Atmospheric Research, Climate and Global Dynamics Laboratory, Boulder, CO, United States, Allegra N. LeGrande, NASA GISS 568, New York, NY, United States and Trevor John Porter, University of Toronto Mississauga, Department of Geography, Mississauga, ON, Canada
 
Leveraging the rapid retreat of the Amundsen Ice Stream 13,000 yrs ago to constrain large-scale North American deglaciation (557548)
Tamara Pico1, Alexander Robel2, Evelyn M Powell3, Alan C Mix4 and Jerry X Mitrovica3, (1)Harvard University, Earth and Planetary Sciences, Cambridge, MA, United States, (2)Harvard University, Cambridge, MA, United States, (3)Harvard University, Department of Earth and Planetary Sciences, Cambridge, MA, United States, (4)CEOAS, Oregon State University, Corvallis, OR, United States
 
Paired cosmogenic isotopes reveal Early Pleistocene glacial history in northwest Greenland (580592)
Elizabeth G Ceperley, Oberlin College, Oberlin, OH, United States; University of Wisconsin-Madison, Department of Geoscience, Madison, WI, United States, Shaun A Marcott, University of Wisconsin-Madison, Madison, WI, United States and Marc Caffee, Purdue University, West Lafayette, IN, United States
 
Unprecedented Vulnerability of the Antarctic Ice Sheet (592078)
Robert M Deconto, University of Massachusetts Amherst, Department of Geosciences, Amherst, MA, United States, David Pollard, Pennsylvania State University, Earth and Environmental Systems Institute, University Park, PA, United States and Edward Gasson, University of Bristol, Bristol, United Kingdom
 
West Antarctic Ice Sheet History from a Subglacial Bedrock Core (593056)
John Stone1, Perry E Spector2, Trevor Hillebrand1, Joel H Gombiner1, James K Feathers3, Joseph Talghader4, Jeffrey P Severinghaus5, David Pollard6, Greg Balco7 and L Keith Fifield8, (1)University of Washington, Department of Earth and Space Sciences, Seattle, WA, United States, (2)University of California Berkeley, Berkeley, CA, United States, (3)University of Washington, Seattle, WA, United States, (4)University of Minnesota Twin Cities, Electrical & Computer Engineering, Minneapolis, MN, United States, (5)Scripps Institution of Oceanography, La Jolla, CA, United States, (6)Pennsylvania State University, Earth and Environmental Systems Institute, University Park, PA, United States, (7)Berkeley Geochronology Center, Berkeley, CA, United States, (8)The Australian National University, Canberra, Australia
 
New Insights to Antarctic Glacial History and Earth Dynamics from Integration of Satellite Gravimetry and Altimetry Measurements of Mass Changes (602673)
H Jay Zwally, University of Maryland College Park, Earth System Science Interdisciplinary Center, College Park, MD, United States and John W Robbins, NASA Goddard Space Flight Center, Code 615 - Cryospheric Lab, Greenbelt, MD, United States
 
Genesis of esker corridors as erosional features beneath ice sheets (630567)
Timothy T Creyts, Columbia University-LDEO, Palisades, NY, United States and Ian Hewitt, University of Oxford, Oxford, United Kingdom
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