PP51C:
Feedbacks on Ice-Sheet Growth and Decay during the Last Glacial Cycle I Posters


Session ID#: 9129

Session Description:
Growth and decay of the global ice sheets during the last glacial cycle was paced by orbital changes in insolation, but feedbacks played a critical role in determining ice-sheet responses to orbital forcing and other internal forcing mechanisms of the climate system. Among the well-known feedbacks are the snow-albedo feedback, the ice-elevation feedback, and the feedbacks involving atmospheric greenhouse gases. More recently, the saddle-collapse mechanism, which is a specific case of the ice-elevation feedback, has received attention, and would have played an important role wherever ice-surface elevation changes arose due to growth or decay of coalescent ice sheets (e.g., Laurentide and Cordilleran, Scandinavian and Barents-Kara). As part of the PAGES/INQUA PALSEA2 working group, this session will address new modeling efforts aimed at investigating the importance of feedbacks in determining late Pleistocene ice-sheet growth and decay, as well as field studies that empirically evaluate these feedback mechanisms of the cryosphere system.
Primary Convener:  Jorie Clark, Oregon State University, Corvallis, OR, United States
Conveners:  Feng He, University of Wisconsin Madison, Madison, WI, United States, Jennifer Sue Walker, Rutgers University, Rutgers, NJ, United States and Gaylen Sinclair, Oregon State University, Corvallis, OR, United States
Chairs:  Jorie Clark1, Feng He2, Jennifer Sue Walker3 and Nicholas Steven Bill1, (1)Oregon State University, Corvallis, OR, United States(2)University of Wisconsin Madison, Madison, WI, United States(3)Rutgers University, New Brunswick, NJ, United States
OSPA Liaison:  Feng He, University of Wisconsin Madison, Madison, WI, United States

Cross-Listed:
  • C - Cryosphere
Index Terms:

4901 Abrupt/rapid climate change [PALEOCEANOGRAPHY]
4926 Glacial [PALEOCEANOGRAPHY]
4934 Insolation forcing [PALEOCEANOGRAPHY]
4946 Milankovitch theory [PALEOCEANOGRAPHY]

Abstracts Submitted to this Session:

Brent Ward1, Jeffery D Bond2, John C Gosse3 and Derek G Turner1, (1)Simon Fraser University, Earth Sciences, Burnaby, BC, Canada, (2)Yukon Geological Survey, Whitehorse, YT, Canada, (3)Dalhousie University, Earth and Environmental Sciences, Halifax, NS, Canada
David Leydet1, Anders E Carlson2, Gaylen Sinclair2, James T Teller3, Andrew J. Breckenridge4, Marc W Caffee5 and Aaron M Barth2, (1)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (2)Oregon State University, Corvallis, OR, United States, (3)University of Manitoba, Winnipeg, MB, Canada, (4)University of Wisconsin - Superior, Superior, WI, United States, (5)Purdue University, Department of Physics and Astronomy, West Lafayette, IN, United States
Nils-Olof Svensson, Kristianstad University, Kristianstad, Sweden
Jennifer Sue Walker1, Nicole Khan2, Timothy Shaw2, Erica L. Ashe3, Matteo Vacchi4, W Richard Peltier5, Robert E Kopp6 and Benjamin Peter Horton7, (1)Rutgers University, New Brunswick, NJ, United States, (2)Rutgers University, Marine and Coastal Sciences, New Brunswick, NJ, United States, (3)Rutgers University New Brunswick, New Brunswick, NJ, United States, (4)CEREGE, Aix-en-Provence Cedex, France, (5)University of Toronto, Toronto, ON, Canada, (6)Rutgers University New Brunswick, Department of Earth and Planetary Sciences, New Brunswick, NJ, United States, (7)Rutgers University New Brunswick, Marine and Coastal Sciences, New Brunswick, NJ, United States
Matthew J Gerlach, University of Rhode Island, Geosciences, Kingston, RI, United States, Simon E Engelhart, University of Rhode Island, Department of Geosciences, Narragansett, RI, United States, Andrew Kemp, Tufts University, Department of Earth and Ocean Sciences, Medford, United States, Ryan P Moyer, Florida FWC, St Petersburg, FL, United States, Joseph M Smoak, University of South Florida Saint Petersburg, Saint Petersburg, FL, United States and Christopher E Bernhardt, USGS, Reston, VA, United States
Lukas W. M. Becker, Hans Petter Sejrup, Haflidi Haflidason and Berit Oline B. Hjelstuen, University of Bergen, Department of Earth Science, Bergen, Norway
David Small, University of Glasgow, Glasgow, G12, United Kingdom
Jeremy N Bassis1, Sierra V Petersen2 and L. Mac M Cathles IV1, (1)University of Michigan Ann Arbor, Ann Arbor, MI, United States, (2)University of Michigan, Earth and Environmental Sciences, Ann Arbor, MI, United States
Taimaz Bahadory, Memorial University of Newfoundland, St John's, NL, Canada and Lev Tarasov, Memorial University of Newfoundland, St John's, Canada
Jonathan Hahn1, James Walsh2, Esther Widiasih3 and Richard McGehee1, (1)University of Minnesota, Mathematics, Minneapolis, MN, United States, (2)Oberlin College, Mathematics, Oberlin, OH, United States, (3)University of Hawaii West Oahu, Kapolei, HI, United States
Gaylen Sinclair1, Anders E Carlson1 and Brendan Reilly2, (1)Oregon State University, Corvallis, OR, United States, (2)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States
Anne E Jennings1, Ethan Bailey1, Brett Oliver1, John T Andrews1, Maarten Arnoud Prins2, Simon Troelstra2, Joseph Stephen Stoner3, Brendan T Reilly3, Maureen Davies-Walczak4,5 and Alan C Mix6, (1)Institute of Arctic and Alpine Research, Boulder, CO, United States, (2)VU University Amsterdam, Amsterdam, Netherlands, (3)Oregon State University, College of Earth, Ocean and Atmospheric Sciences, Corvallis, OR, United States, (4)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (5)CEOAS, Oregon State University, Corvallis, OR, United States, (6)Oregon State University, Corvallis, OR, United States
Victor Cleveland1, Sean P S Gulick2, John Goff1 and John M. Swartz3, (1)University of Texas at Austin, Austin, TX, United States, (2)The University of Texas at Austin, Department of Geological Sciences, Austin, TX, United States, (3)The University of Texas at Austin, Institute for Geophysics, Austin, TX, United States