C54A:
Scratching the Surface: Discoveries and Challenges in Constraining Surface Processes over Ice Sheets, Glaciers, and Sea Ice II

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Session ID#: 17617

Session Description:
Surface mass balance (SMB) processes, such as snowfall, blowing snow sublimation and redistribution, snow and ice albedo evolution, and meltwater production and its routing and retention, are key to understanding changes occurring over ice sheets, glaciers, sea ice, and seasonal snow cover. Several of these processes initiate a positive feedback that can magnify their impact. For example, surface melt not only affects albedo, but also aids in the rapid disintegration of sea ice and ice shelves, the latter of which are major stabilizing features around Antarctica. Field measurements have led to new discoveries, such as Greenland's firn aquifer, and modeling work has provided insight into the mechanisms controlling its formation. This session seeks contributions from across the cryosphere on SMB and its components, including new observational techniques and modelling efforts as well as remaining challenges in both, and their role in observed change.
Primary Convener:  Brooke Medley, NASA Goddard Space Flight Center, Greenbelt, MD, United States
Conveners:  Jan Lenaerts, Utrecht University, Utrecht, Netherlands, Lora Koenig, National Snow and Ice Data Center, Boulder, CO, United States and Indrani Das, Lamont -Doherty Earth Observatory, Palisades, NY, United States
Chairs:  Indrani Das, Lamont -Doherty Earth Observatory, Palisades, NY, United States, Jan Lenaerts, Utrecht University, Utrecht, Netherlands, Lora Koenig, National Snow and Ice Data Center, Boulder, CO, United States and Brooke Medley, NASA Goddard Space Flight Center, Greenbelt, MD, United States
OSPA Liaison:  Indrani Das, Lamont -Doherty Earth Observatory, Palisades, NY, United States
Index Terms:

0762 Mass balance 0764 Energy balance [CRYOSPHERE]
0794 Instruments and techniques [CRYOSPHERE]
0798 Modeling [CRYOSPHERE]

Abstracts Submitted to this Session:

Physical Controls on the Presence of Dark Ice on the Greenland Ice Sheet (138144)
Andrew Tedstone1, Jonathan L Bamber2, Christopher Williamson2, Joseph Cook3, James B McQuaid4 and Xavier Fettweis5, (1)University of Bristol, School of Geographical Sciences, Bristol, BS8, United Kingdom, (2)University of Bristol, School of Geographical Sciences, Bristol, United Kingdom, (3)University of Sheffield, School of Geography, Sheffield, S10, United Kingdom, (4)University of Leeds, Leeds, United Kingdom, (5)University of Liège, Département de Géographie, Liège, Belgium
Rise in central west Greenland surface melt unprecedented over the last three centuries (Invited) (186301)
Luke D Trusel, Rowan University, Geology, Glassboro, NJ, United States, Sarah B Das, WHOI, Woods Hole, United States, Matthew B Osman, WHOI, Woods Hole, MA, United States, Matthew Jared Evans, Wheaton College, Norton, MA, United States, Benjamin Eaton Smith, University of Washington, Applied Physics Laboratory, Seattle, WA, United States, Joe McConnell, Desert Research Institute, Division of Hydrologic Science, Reno, United States, Brice Noel, Utrecht University, Institute for Marine and Atmospheric Research Utrecht, Utrecht, Netherlands and Michiel R van den Broeke, Utrecht University, Utrecht, Netherlands
Understanding Greenland Ice Sheet Runoff Losses (Invited) (127480)
Asa K Rennermalm1, Marco Tedesco2, Laurence C Smith3, Lincoln H H Pitcher4, Thomas L Mote5, Yager L Patricia6, Samiah Moustafa7, Matthew G Cooper8, Dirk van As9, Bent Hasholt10 and Andreas Bech Mikkelsen10, (1)Rutgers University, Geography, New Brunswick, United States, (2)Lamont-Doherty Earth Observatory, Palisades, NY, United States, (3)Brown University, Institute at Brown for Environment and Society (IBES); Department of Earth, Environmental, and Planetary Sciences (DEEPS), Providence, RI, United States, (4)University of California Los Angeles, Los Angeles, United States, (5)University of Georgia, Athens, GA, United States, (6)University of Georgia, Department of Marine Sciences, Athens, GA, United States, (7)Brown University, Providence, RI, United States, (8)University of California Los Angeles, Geography, Los Angeles, CA, United States, (9)Geological Survey of Denmark and Greenland, København K, Denmark, (10)University of Copenhagen, Department of Geosciences and Natural Resource Management, Copenhagen, Denmark
Inferring firn permeability from pneumatic testing on the Greenland Ice Sheet (160632)
Aleah N Sommers, University of Colorado at Boulder, Boulder, CO, United States, Harihar Rajaram, Johns Hopkins University, Baltimore, MD, United States, Michael J MacFerrin, University of Colorado at Boulder, Boulder, United States, Eliezer P Weber, Apex Companies, LLC, Boulder, CO, United States, William T Colgan, York University, Toronto, ON, Canada and C Max Stevens, University of Washington, Seattle, WA, United States
Snow, Firn and Ice Heterogeneity within Larsen C Ice Shelf Revealed by Borehole Optical-televiewing (156738)
Bryn P Hubbard1, David Ashmore2, Adrian J Luckman3, Bernd Kulessa3, Suzanne Louise Bevan4, Adam D Booth5, Peter Kuipers Munneke6, Martin O'Leary3 and Heidi Sevestre7, (1)Aberystwyth University, Department of Geography and Earth Sciences, Aberystwyth, United Kingdom, (2)Aberystwyth University, Aberystwyth, United Kingdom, (3)Swansea University, Swansea, United Kingdom, (4)Swansea University, Glaciology Group, Swansea, United Kingdom, (5)University of Leeds, School of Earth and Environment, Leeds, LS2, United Kingdom, (6)Utrecht University, Institute for Marine and Atmospheric Research Utrecht, Utrecht, Netherlands, (7)University of St Andrews, St Andrews, United Kingdom
Widespread surface meltwater drainage in Antarctica (157180)
Jonathan Kingslake1, Jeremy Ely2, Indrani Das3 and Robin Elizabeth Bell1, (1)Lamont-Doherty Earth Observatory, Palisades, NY, United States, (2)University of Sheffield, Sheffield, United Kingdom, (3)Lamont -Doherty Earth Observatory, Palisades, NY, United States
Antarctic Megadunes:Form and Character from Satellite and Field-based Studies (166733)
Ted A Scambos1, Christopher A. Shuman2, Mark A Fahnestock3 and Terry Haran1, (1)National Snow and Ice Data Center, Boulder, CO, United States, (2)University of Maryland, Baltimore County at NASA Goddard Space Flight Center, Greenbelt, MD, United States, (3)University of Alaska Fairbanks, Fairbanks, AK, United States
Processes Controlling the Surface Mass Balance of the Greenland Ice Sheet for Improving Mass Balance Estimates: Outcomes from a Community Workshop (131244)
Marco Tedesco, Lamont Doherty Earth Observatory, Columbia University, Palisades, NY, United States, Robin Elizabeth Bell, Lamont-Doherty Earth Observatory, Palisades, NY, United States, Indrani Das, Lamont -Doherty Earth Observatory, Palisades, NY, United States, Edward Hanna, University of Lincoln, Lincoln, United Kingdom, Patrick M Alexander, NASA Goddard Institute for Space Studies, New York, United States, Lora Koenig, National Snow and Ice Data Center, Boulder, CO, United States, Michael J MacFerrin, University of Colorado at Boulder, Boulder, United States and Asa K Rennermalm, Rutgers University, Geography, New Brunswick, United States

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