C038
Understanding Ice-Shelf Processes

Session ID#: 74292

Session Description:
Ice shelves are a crucial part of the marine ice sheet system. They provide buttressing to upstream grounded ice and in many places around Antarctica form the interface for interactions between the ice sheet and the ocean. Any future change in ice-shelf thickness, size and structural integrity is likely to have a profound impact on ice-sheet mass balance.

This session will bring together a wide range of research focused on improving the understanding of ice-shelf processes. From understanding how ice shelves flow and buttress grounded ice, to processes governing potential change and instability; iceberg calving, fracture mechanics, surface hydrology and basal melting.

Presentations are welcome from those undertaking process-based studies, modelling and/or observational work.

Potential topics may include, but are not limited to: ice-shelf buttressing and pinning points; grounding-zone mechanics; crevasse formation; iceberg calving; ice-shelf stability; surface hydrology; ice-ocean interactions; current and future change.

Index Terms:

0728 Ice shelves [CRYOSPHERE]
0774 Dynamics [CRYOSPHERE]
0776 Glaciology [CRYOSPHERE]
0798 Modeling [CRYOSPHERE]

Primary Convener:  Martin Wearing, Lamont-Doherty Earth Observatory, Palisades, NY, United States
Conveners:  Kiya L Riverman, University of Oregon, Eugene, OR, United States, Sammie Claire Buzzard, Georgia Institute of Technology Main Campus, Atlanta, United States and Reinhard Drews, University of Tübingen, Department of Geosciences, Tübingen, Germany
Primary Liaison:  Martin Wearing, Lamont-Doherty Earth Observatory, Palisades, NY, United States
 
Tsunami and Infragravity Wave Excitation of the Ross Ice Shelf, Antarctica (495461)
Peter D Bromirski1, Momme Claus Hell1, Nurbek Tazhimbetov2, Martin Almquist3, Yong Wei4, Eric M Dunham3, Diego Arcas5, Won Sang Lee6 and Sukyoung Yun6, (1)University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States, (2)Stanford University, Stanford, United States, (3)Stanford University, Geophysics, Stanford, CA, United States, (4)NOAA/Pacific Marine Environmental Lab & University of Washington, Seattle, WA, United States, (5)NOAA, NOAA Center for Tsunami Research, Seattle, WA, United States, (6)Korea Polar Research Institute, Incheon, South Korea
 
The 2016 Nansen Ice Shelf Calving Event: Hydroacoustic, Meteorologic and Seismic Observations (496941)
Robert P Dziak1, Won Sang Lee2, Joseph Haxel3, Haru Matsumoto3, Gabrielle Tepp4, TK Lau3, Lauren Roche3, Sukyoung Yun2, Choon-Ki Lee2, Ji Yeon Lee2 and S-T Yoon2, (1)NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States, (2)Korea Polar Research Institute, Incheon, South Korea, (3)Oregon State University, CIMRS, Newport, OR, United States, (4)U.S. Geological Survey Alaska Volcano Observatory, Anchorage, AK, United States
 
LARGE SWELL EVENTS IMPACTING THE ROSS ICE SHELF AND THE HARMONIC EXCITATION OF ICE SHELF SEISMIC WAVES (499461)
Richard C Aster, Colorado State University, Geosciences Department, Fort Collins, CO, United States, Michael G Baker, Colorado State University, Fort Collins, CO, United States, Peter D Bromirski, Univ California San Diego, La Jolla, CA, United States, Douglas Wiens, Washington University in St Louis, St. Louis, MO, United States, Andrew Nyblade, Pennsylvania State University, Department of Geosciences, University Park, PA, United States, Peter Gerstoft, Univ of California San Diego, San Diego, CA, United States, Ralph A Stephen, WHOI, Woods Hole, MA, United States and Zhao Chen, University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States
 
Bumps Ahead: An Investigation into the Calculation and Evolution of Roughness in Ice Shelves (501644)
Ray Watkins1, Jeremy N Bassis1, Brandon Robert Berg2, Adrian J Luckman3 and Anna Crawford4, (1)University of Michigan, Ann Arbor, MI, United States, (2)University of Michigan Ann Arbor, Ann Arbor, MI, United States, (3)Swansea University, Glaciology Group, Swansea, United Kingdom, (4)University of St Andrews, St Andrews, United Kingdom
 
Topographic Shelf Waves Control Seasonal Melting Near Antarctic Ice Shelf Grounding Lines (505283)
Sun Sainan, Universite Libre de Bruxelles, Bruxelles, Belgium, Tore Hattermann, Norwegian Polar Institute, Tromso, Norway, Frank Pattyn, Université Libre de Bruxelles, Brussel, Belgium, Keith W Nicholls, British Antarctic Survey, Cambridge, United Kingdom, Reinhard Drews, University of Bremen, Bremen, Germany and Sophie Berger, Alfred Wegener Institute, Glaciology, Bremerhaven, Germany
 
Direct and indirect impacts of basal channels on ice-shelf stability (509049)
Karen E Alley1, Christine F Dow2, Sophia Sareen2, Julia Pearson1, Ted A Scambos3, Richard B Alley4, Nicholas Holschuh5 and Sarah F Child6, (1)College of Wooster, Wooster, OH, United States, (2)University of Waterloo, Waterloo, ON, Canada, (3)University of Colorado Boulder, Boulder, CO, United States, (4)Pennsylvania State University, Geosciences, University Park, PA, United States, (5)University of Washington, Earth and Space Sciences, Seattle, WA, United States, (6)University of Kansas, Lawrence, KS, United States
 
Diagnosing the sensitivity of grounding line flux to changes in sub-ice shelf melting (518258)
Tong Zhang1, Stephen F Price1, Matthew J Hoffman1, Mauro Perego2 and Xylar Asay-Davis1, (1)Los Alamos National Laboratory, Los Alamos, NM, United States, (2)Sandia National Laboratories, Albuquerque, NM, United States
 
Satellite observations of Antarctic ice velocity variability (519632)
Chad A Greene and Alex S Gardner, NASA Jet Propulsion Laboratory, Pasadena, CA, United States
 
Evolution of Basal Channels in West Antarctic Ice Shelves (520707)
Allison Chartrand and Ian Howat, Ohio State University, Byrd Polar & Climate Research Center, Columbus, OH, United States
 
The Petermann Ice Shelf estuary and its impact on ice-shelf stability (523862)
Alexandra Boghosian1, Lincoln H Pitcher2, Robin Elizabeth Bell1 and Laurence C Smith3, (1)Lamont -Doherty Earth Observatory, Palisades, NY, United States, (2)University of California Los Angeles, Los Angeles, CA, United States, (3)Brown University, Providence, RI, United States
 
Ocean-Driven Seasonal Velocity Variability of Ross Ice Shelf, Antarctica (531891)
Emilie Klein1,2, Cyrille Mosbeux3, Peter D Bromirski4, Laurence Padman5, Yehuda Bock1, Helen Amanda Fricker3 and Scott R Springer6, (1)Scripps Institution of Oceanography, Institute of Geophysics and Planetary Physics, La Jolla, CA, United States, (2)Laboratoire de Géologie, ENS, CNRS, UMR 8538, PSL Research University, Paris, France, (3)Scripps Institution of Oceanography, La Jolla, CA, United States, (4)Univ California San Diego, La Jolla, CA, United States, (5)Earth & Space Research, Corvallis, OR, United States, (6)Earth & Space Research, Seattle, WA, United States
 
Rifts, marginal weakening, and ice shelf stability: a three-dimensional linear elastic fracture mechanical analysis (536515)
Bradley Paul Lipovsky, Harvard University, Department of Earth and Planetary Sciences, Cambridge, MA, United States
 
Hindcast and Projection of Mass Loss from the Amundsen Sea Glaciers in a Coupled Ice-Ocean Framework. (Invited) (536574)
Jan De Rydt1, Gudmundur Hilmar Gudmundsson1, Kaitlin Naughten2, Satoshi Kimura3 and Mathieu Morlighem4, (1)Northumbria University, Geography and Environmental Sciences, Newcastle-Upon-Tyne, United Kingdom, (2)NERC British Antarctic Survey, Cambridge, United Kingdom, (3)Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan, (4)University of California - Irvine, Irvine, CA, United States
 
The Role of Ocean Forcing In Triggering Ice Shelf Disintegration (537244)
Jeremy N Bassis1, Ray Watkins2, Brandon Robert Berg1 and Morgan Whitcomb1, (1)University of Michigan Ann Arbor, Ann Arbor, MI, United States, (2)University of Michigan, Ann Arbor, MI, United States
 
Ice-shelf stability in Dronning Maud Land, Antarctica (Invited) (541074)
Sophie Berger1, Veit Helm1, Frank Pattyn2, Niklas Neckel1, Reinhard Drews3, Lionel Favier4, Quentin Glaude5,6, Sainan Sun2 and Olaf Eisen7,8, (1)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (2)Université Libre de Bruxelles, Brussel, Belgium, (3)University of Tübingen, Department of Geosciences, Tübingen, Germany, (4)CNRS - Université Grenoble Alpes - Institut des Géosciences de l'Environnement, Saint Martin d'Heres, France, (5)Université libre de Bruxelles, Brussels, Belgium, (6)Université de Liège, Centre Spatial de Liège, Angleur, Belgium, (7)University of Bremen, Department of Geosciences, Bremen, Germany, (8)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research (AWI), Division of Geosciences, Bremerhaven, Germany
 
Vulnerability of Antarctica’s ice shelves to meltwater-driven fracture (541420)
Ching-Yao Lai1, Jonathan Kingslake1, Martin Wearing2, Po-Hsuan Cameron Chen3, Pierre Gentine4, Harold Li5, Julian Spergel1 and Melchior van Wessem6, (1)Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States, (2)Lamont-Doherty Earth Observatory, Palisades, NY, United States, (3)Google Research, Mountain View, CA, United States, (4)Department of Earth and Environmental Engineering, Columbia University, New York, NY, United States, (5)Department of Computer Science, Columbia University, New York, NY, United States, (6)IMAU, Utrecht, Netherlands
 
Links Between Calving Dynamics, Ice Velocity and Grounding Line Retreat of Denman Glacier, East Antarctica 1962-2018 (541488)
Bertie Miles1, Jim Rowan Jordan2, Chris Stokes1, Stewart Jamieson1, Gudmundur Hilmar Gudmundsson2 and Adrian Jenkins3, (1)Durham University, Department of Geography, Durham, United Kingdom, (2)Northumbria University, Geography and Environmental Sciences, Newcastle-Upon-Tyne, United Kingdom, (3)NERC British Antarctic Survey, Cambridge, United Kingdom
 
Inferring ice rheology in Antarctic ice shelves using remotely-sensed surface velocity observations (558488)
Joanna D Millstein, Massachusetts Institute of Technology, Cambridge, MA, United States; Woods Hole Oceanographic Institution, Woods Hole, MA, United States and Brent M Minchew, Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States
 
The Contrasting Evolutions of Steensby, Ryder, Ostenfeld and Hagen Brae Ice Shelves in Northern Greenland (561140)
Ala Khazendar and Josh K Willis, Jet Propulsion Laboratory, Pasadena, CA, United States
 
Radio-echo sounding of Crary Ice Rise reveals abundant marine ice in former ice shelf rifts and basal crevasses (599402)
Trevor Hillebrand1, Howard Conway1, Michelle R Koutnik1, Carlos Martin2, John Drysdale Paden3 and Jeremy Paul Winberry4, (1)University of Washington, Department of Earth and Space Sciences, Seattle, WA, United States, (2)NERC British Antarctic Survey, Cambridge, United Kingdom, (3)University of Kansas, Lawrence, United States, (4)Central Washington Univ, Ellensburg, WA, United States
 
Seismicity Generated by Rifting and Calving at Pine Island Glacier Ice Shelf (604333)
Seth Olinger1, Marine Denolle1 and Bradley Paul Lipovsky2, (1)Harvard University, Earth and Planetary Sciences, Cambridge, MA, United States, (2)Harvard University, Department of Earth and Planetary Sciences, Cambridge, MA, United States
 
The role of basal channels and fractures in the stability of ice bodies in Terra Nova Bay, East Antarctica (604395)
Christine Indrigo1, Peter L Wray1, Christine F Dow1, Derek Mueller2, Won Sang Lee3, Duncan A Young4, Jamin Stevens Greenbaum5, Donald D Blankenship5 and Mathieu Morlighem6, (1)University of Waterloo, Waterloo, ON, Canada, (2)Carleton University, Geography and Environmental Studies, Ottawa, ON, Canada, (3)Korea Polar Research Institute, Incheon, South Korea, (4)Institute for Geophysics, Austin, TX, United States, (5)University of Texas, Institute for Geophysics, Austin, TX, United States, (6)University of California - Irvine, Irvine, CA, United States
 
Gaps and band gaps in the dispersion spectra in the ice shelf free vibration problem (605342)
Yuri Konovalov, ORCID: orcid.org/0000-0002-8469-9706, Moscow, Russia
 
Mapping Marine Ice Beneath Ross Ice Shelf, Antarctica, with ROSETTA-Ice Radar Sounding and ICESat-2 Laser Altimetry (609156)
Maya Karina Becker1, Helen Amanda Fricker1, Laurence Padman2, Matthew R Siegfried3, Brooke Medley4, Indrani Das5, S. Isabel Cordero5, Robin Elizabeth Bell5 and the ROSETTA-Ice Team, (1)Scripps Institution of Oceanography, La Jolla, CA, United States, (2)Earth & Space Research, Corvallis, OR, United States, (3)Colorado School of Mines, Department of Geophysics, Golden, CO, United States, (4)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (5)Lamont -Doherty Earth Observatory, Palisades, NY, United States
 
Bayesian Inference of Tidally Induced Periodic Grounding of Antarctic Ice Shelves Using Temporally Dense SAR Observations (616025)
Minyan Zhong1, Mark Simons1, Lijun Zhu1, Brent M Minchew2, Francesca Cigna3 and Enrico Flamini3,4, (1)California Institute of Technology, Pasadena, CA, United States, (2)Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States, (3)Italian Space Agency, Rome, Italy, (4)D'Annunzio University of Chieti–Pescara, Chieti, Italy
 
Seismic Evidence for Pervasive Surface Fracturing Near the Grounding Line of the Ross Ice Shelf (618064)
Em Schnorr1, Susan Y Schwartz1, Slawek M Tulaczyk1, Grace Barcheck2 and Tyler Paladino3, (1)University of California Santa Cruz, Earth and Planetary Sciences, Santa Cruz, CA, United States, (2)Cornell University, Ithaca, NY, United States, (3)Idaho State University, Pocatello, ID, United States
 
Electrical Resistivity Measurements of the McMurdo Ice Shelf, Antarctica, Reveal Seawater Intrusion in New Detail (620558)
Neil Foley, University of California Santa Cruz, Department of 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, Esben Auken, University of Aarhus, Aarhus, Denmark, Denys Grombacher, Aarhus University, Aarhus C, Denmark, Nikolaj Foged, Gaborone, Botswana, Jill Mikucki, University of Tennessee, Department of Microbiology, Knoxville, TN, United States, Peter T Doran, Louisiana State University, Geology and Geophysics, Baton Rouge, United States, Krista Myers, Louisiana State University, Baton Rouge, United States, Hilary A Dugan, University of Wisconsin, Madison, WI, United States and Ross A Virginia, Dartmouth College, Environmental Studies Program, Hanover, NH, United States
 
Variability of ice shelf-influenced fast ice and the sub-ice platelet layer (625650)
Gemma Brett1, Anne Irvin2, Wolfgang Rack1, Christian Haas3,4, Pat Langhorne5 and Greg H Leonard6, (1)University of Canterbury, Gateway Antarctica, Christchurch, New Zealand, (2)SmartICE Sea Ice Monitoring & Information Inc., St. John's, NF, Canada, (3)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (4)York University, Toronto, Canada, (5)University of Otago, Dunedin, New Zealand, (6)University of Otago, School of Surveying, Dunedin, New Zealand
 
Improved models of crevasse depth based on theoretical and empirical findings for crack arrest (626928)
Christopher P Borstad, Montana State University, Bozeman, MT, United States
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