C019
How stable is the Greenland Ice Sheet? Past, Present and Future

Session ID#: 160324

Session Description:
Recent scientific evidence across disciplines points to an unstable Greenland Ice Sheet (GrIS), which is particularly concerning in view of a rapidly changing Arctic system, its impacts on local communities and eco-systems, and the regional and global impacts of sea-level rise. The goal of this session is to better understand the GrIS stability problem by a holistic, all-hands-on-deck approach. We invite papers addressing the stability of the GrIS via: (i) modern and paleo observations, from ice-penetrating radar and geophysical studies, to remote sensing observations, to studies investigating the former dimensions of the GrIS, (ii) model experiments that assess the GrIS response to warming across paleo, modern, and future timescales, and (iii) investigation of the recent change of state of the GrIS including its glaciology, hydrology, and geothermal regime.
Index Terms:

0726 Ice sheets [CRYOSPHERE]
0758 Remote sensing [CRYOSPHERE]
0776 Glaciology [CRYOSPHERE]
0798 Modeling [CRYOSPHERE]

Primary Convener:  Joerg M Schaefer, Columbia University - Lamont, Palisades, NY, United States
Conveners:  Nicolas E. Young, Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States, Sophie Nowicki, NASA GSFC, Greenbelt, NY, United States; University at Buffalo, Geology, Buffalo, United States and Benjamin Andrew Keisling, University of Texas Institute for Geophysics, Austin, United States
 
On the Stability of Northeast Greenland: an Interplay Between Surface Processes, Basal Hydrology and Ice Dynamics. (Invited) (1058459)
Ilaria Tabone, Johannes Fürst and Thomas Mölg, University of Erlangen-Nuremberg, Erlangen, Germany
 
The Potential for Meltwater Pulses from Greenland Ice Saddle Collapse under Future and Past Climate Change (1068222)
Chase Chivers, Woods Hole Oceanographic Institution, Woods Hole, MA, United States and Alexander Robel, Georgia Institute of Technology Main Campus, Earth and Atmospheric Science, Atlanta, United States
 
Atlantic Water intrusion triggers sudden and rapid retreat of K.I.V Steenstrups Nordre Bræ following long-term stability (1093921)
Thomas R Chudley1, Ian M Howat2, Michalea D King3 and Adelaide Negrete2, (1)Ohio State University, Byrd Polar & Climate Research Center, Columbus, United States, (2)Ohio State University, Byrd Polar and Climate Research Center, Columbus, United States, (3)Applied Physics Laboratory University of Washington, Polar Science Center, Seattle, WA, United States
 
Multi-temporal Evolution and Collapse of Midgaard Glacier, Southeast Greenland from the Little Ice Age to the Present. (1106134)
Flora Huiban1, Mads Dømgaard1, Romain Millan2, Jeremie Mouginot3, Amaury Dehecq3, Luc Girod4, Stephen Lawrence Brunt5, Shfaqat Abbas Khan6 and Anders Anker Bjørk5, (1)University of Copenhagen, Department of Geosciences and Natural Resource Management, København K, Denmark, (2)University of Copenhagen, København K, Denmark, (3)University of Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE, Grenoble, France, (4)University of Oslo, Department of Geosciences, Oslo, Norway, (5)University of Copenhagen, Department of Geosciences and Natural Resource Management, Copenhagen, Denmark, (6)Technical University of Denmark - Space, Kongens Lyngby, Denmark
 
Catchment-Scale Measurement of Englacial Deformation in Greenland (1118698)
Nicholas Holschuh1, Gordon Ariho2, Knut A Christianson3, Andrew Osten Hoffman3 and John Drysdale Paden4, (1)Amherst College, Geology, Amherst, MA, United States, (2)Center For Remote Sensing of Ice Sheets (CReSIS), University of Kansas, Lawrence, United States, (3)University of Washington, Earth and Space Sciences, Seattle, WA, United States, (4)Center for Remote Sensing of Ice Sheets (CReSIS), University of Kansas, Lawrence, KS, United States
 
Quantitative Assessment of Stabilizing or Destabilizing Effect of Fjord Geometry on Greenland Tidewater Glaciers (1134202)
Elizabeth Fischer, University of Alaska Fairbanks, Fairbanks, United States and Andy Aschwanden, University of Alaska Fairbanks, Fairbanks, AK, United States
 
Quantifying terminus ablation for 58 tidewater glaciers in Greenland over the last century (1165567)
Dominik Fahrner1, Aman KC2, Ellyn M Enderlin3, David Sutherland4, Till J.W. Wagner5, Pete Nienow6, Femke de Jong7, Sophie Nowicki8, Donald Alexander Slater6, Michael Wood9, Kristian K Kjeldsen10 and Claudia Cenedese11, (1)University of Oregon, Department of Earth Sciences, Eugene, United States, (2)Boise State University, Department of Geosciences, Boise, United States, (3)Boise State University, Department of Geosciences, Boise, ID, United States, (4)University of Oregon, Department of Earth Sciences, Eugene, OR, United States, (5)University of Wisconsin Madison, Madison, WI, United States, (6)University of Edinburgh, School of Geosciences, Edinburgh, United Kingdom, (7)Royal Netherlands Institute for Sea Research, Texel, Netherlands, (8)University at Buffalo, Department of Geology, Buffalo, United States, (9)JPL/NASA/Caltech, Pasadena, CA, United States, (10)Geological Survey of Denmark and Greenland, København K, Denmark, (11)WHOI, Woods Hole, MA, United States
 
Shifting Ice Flow and Direction in the Greenland Ice Sheet Interior Since 1959 (1174009)
Anja Løkkegaard, DTU National Space Institute, København Ø, Denmark, William Colgan, Geological Survey of Denmark and Greenland, København K, Denmark and Shfaqat Abbas Khan, Technical University of Denmark - Space, Kongens Lyngby, Denmark
 
Snow Volume Change from Radar Layer Tracking (1190646)
Alejandra Vega, University of Puerto Rico Mayaguez, Mayaguez, PR, United States and Thomas B Overly, NASA Goddard Space Flight Center, Greenbelt, United States
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