C41E:
Scratching the Surface: Discoveries and Challenges in Constraining Surface Processes over Ice Sheets, Glaciers, and Sea Ice I Posters

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Session ID#: 13119

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:

Evaluation of a 12-km Satellite-Era Reanalysis of Surface Mass Balance for the Greenland Ice Sheet (123635)
Richard I Cullather1,2, Sophie Nowicki3, Bin Zhao3,4 and Suarez Max3,5, (1)University of Maryland College Park, Earth System Science Interdisciplinary Center, College Park, MD, United States, (2)NASA Goddard Space Flight Center, Global Modeling and Assimilation Office, Greenbelt, United States, (3)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (4)Science Applications International Corporation Greenbelt, Greenbelt, MD, United States, (5)Universities Space Research Association Greenbelt, Greenbelt, MD, United States
Quantifying ‘missing melt’ in regional climate model predictions of Greenland ice sheet change (147529)
Amber Leeson, University of Lancaster, Lancaster Environment Centre / Data Science institute, Lancaster, United Kingdom, Emma Eastoe, University of Lancaster, Maths and Statistics, Lancaster, United Kingdom and Xavier Fettweis, University of Liège, Département de Géographie, Liège, Belgium
Greenland firn aquifer investigations from remote sensing, geophysics, and in situ measurements (124412)
Richard R Forster1, Clément Miège2, Olivia Miller3, Kip Kip Solomon4, Nicholas C Schmerr5, Anatoly Legchenko6, Lora Koenig7, Noah Brautigam4, Laura McNerney4 and Julie Miller8, (1)University of Utah, School of Environment, Society, and Sustainability, Salt Lake City, UT, United States, (2)University of Utah, Salt Lake City, United States, (3)U.S. Geological Survey, Utah Water Science Center, Salt Lake City, United States, (4)University of Utah, Salt Lake City, UT, United States, (5)University of Maryland College Park, Department of Geology, College Park, MD, United States, (6)University Grenoble Alpes, Grenoble, France, (7)National Snow and Ice Data Center, Boulder, CO, United States, (8)The Ohio State University, Columbus, OH, United States
The Effects of Fog on the Surface Energy Balance of McCall Glacier, Alaska: Combining Time-Lapse Photography with Weather Station Data (129451)
Hester Jiskoot, University of Lethbridge, Geography and Environment, Lethbridge, AB, Canada, Thomas A. Fox, University of Calgary, Department of Geography, Calgary, AB, Canada and Matt Nolan, University of Alaska Fairbanks, Fairbanks, AK, United States
Albedo Spatial Variability and Causes on the Western Greenland Ice Sheet Percolation Zone (138732)
Gabriel Lewis1, Erich C Osterberg2, Robert L Hawley1, Bess G Koffman3, Hans-Peter Marshall4, Sean D Birkel5 and Jack E Dibb6, (1)Dartmouth College, Department of Earth Sciences, Hanover, NH, United States, (2)Dartmouth College, Department of Earth Sciences, Hanover, United States, (3)Dartmouth College, Earth Sciences, Hanover, NH, United States, (4)Boise State University, Department of Geosciences, Boise, ID, United States, (5)University of Maine, School of Earth and Climate Sciences, Orono, United States, (6)University of New Hampshire Main Campus, Institute for the Study of Earth, Ocean, and Space, Durham, NH, United States
Firn Thickness Changes (1982-2015) Driven by SMB from MERRA-2, RACMO2.3, ERA-Int and AVHRR Surface Temperature and the Impacts to Greenland Ice Sheet Mass Balance (148452)
Jun Li, NASA Goddard Space Flight Center, SGT, Inc., NASA Goddard Space Flight Center, Greenbelt, MD, USA, Greenbelt, MD, United States, Brooke Medley, NASA Goddard Space Flight Center, Earth Sciences Division, Greenbelt, MD, United States, Tom Neumann, NASA Goddard Space Flight Ctr., Greenbelt, United States, Benjamin Eaton Smith, University of Washington Seattle Campus, Seattle, WA, United States, Scott B Luthcke, NASA Goddard Space Flight Center, Greenbelt, United States and H Jay Zwally, University of Maryland College Park, Earth System Science Interdisciplinary Center, College Park, MD, United States
Surface Melt and Firn Density Evolution in the Western Greenland Percolation Zone Over the Past 50 Years (157049)
Karina Graeter1, Erich C Osterberg2, Robert L Hawley1, Zayta Renay Thundercloud1, Hans-Peter Marshall3, David G Ferris Mr.1 and Gabriel Lewis1, (1)Dartmouth College, Department of Earth Sciences, Hanover, NH, United States, (2)Dartmouth College, Department of Earth Sciences, Hanover, United States, (3)Boise State University, Department of Geosciences, Boise, ID, United States
Characterizing Weathering Crust Hydrology in the Southwest Greenland Ablation Zone (161109)
Matthew G Cooper, University of California, Los Angeles, Geography, Los Angeles, United States, Laurence C Smith, Brown University, Institute at Brown for Environment and Society (IBES); Department of Earth, Environmental, and Planetary Sciences (DEEPS), Providence, RI, United States, Asa K Rennermalm, Rutgers University, Geography, New Brunswick, United States, Lincoln H H Pitcher, University of California Los Angeles, Los Angeles, United States, Clément Miège, University of Utah, Salt Lake City, United States, Sasha Z Leidman, Rutgers, The State University of New Jersey, Geography, New Brunswick, United States, Sarah W Cooley, University of California Los Angeles, Department of Geography, Los Angeles, CA, United States, Charles Mark Kershner, George Mason University Fairfax, Fairfax, VA, United States, Brandon T Overstreet, University of Wyoming, Laramie, WY, United States, Rohi Muthyala, Indian Institute of Science, Bangalore, India, Jonathan Ryan, Aberystwyth University, Aberystwyth, SY23, United Kingdom and Kang Yang, University of California Los Angeles, Los Angeles, CA, United States
Imprints of firn changes in the Cryosat-2 radar altimetry record (173293)
Sebastian B Simonsen1, Louise Sandberg Sorensen2, Ruth Mottram3, Peter P Langen4 and Rene Forsberg1, (1)Technical University of Denmark, Kgs. Lyngby, Denmark, (2)DTU Space, Lyngby, Denmark, (3)Danish Meteorological Institute, Copenhagen East, Denmark, (4)Danish Meteorological Institute, København Ø, Denmark
Mass Balance and Structure of the Ross Ice Shelf (176005)
Indrani Das1, Laurence Padman2, Winnie Chu3, Helen Amanda Fricker4, Maya Karina Karina Becker5, Robin Elizabeth Bell6, Kirsty J Tinto6 and Joanna D Millstein7, (1)Lamont -Doherty Earth Observatory, Palisades, NY, United States, (2)Earth and Space Research, Seattle, WA, United States, (3)Stanford University, Department of Geophysics, Stanford, CA, United States, (4)University of California San Diego, Scripps Institution of Oceanography, San Diego, United States, (5)Scripps Institution of Oceanography, La Jolla, CA, United States, (6)Lamont-Doherty Earth Observatory, Palisades, NY, United States, (7)Colorado School of Mines, Department of Geophysics, Golden, United States
Abrupt Shift in the Observed Runoff from the Southwest Greenland Ice Sheet? (177200)
Andreas Ahlstrom1, Dorthe Petersen2, Jason Box3, Peter P Langen4 and Michele Citterio3, (1)Geological Survey of Denmark and Greenland, Copenhagen, Denmark, (2)Asiaq, Greenland Survey, Nuuk, Greenland, (3)Geological Survey of Denmark and Greenland, København K, Denmark, (4)Danish Meteorological Institute, København Ø, Denmark
Modeling Greenland Ice Sheet Snow and Firn Densities: Role of Dry Snow Density, Liquid Water, and Model Setup (179877)
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, Marco Tedesco, Lamont-Doherty Earth Observatory, Palisades, NY, United States, Peter Kuipers Munneke, Institute for Marine and Atmospheric Research Utrecht, Utrecht, Netherlands, Xavier Fettweis, University of Liège, Département de Géographie, Liège, Belgium, Stefan Ligtenberg, University Utrecht / IMAU, Utrecht, Netherlands, Brice Noel, Utrecht University, Institute for Marine and Atmospheric Research Utrecht, Utrecht, Netherlands, Michiel R van den Broeke, Utrecht University, Utrecht, Netherlands and Clément Miège, University of Utah, Salt Lake City, United States
Spatial and temporal variation in ice sheet surface reflectance characteristics at the MODIS-pixel scale in the ablation area of SW Greenland (186453)
Tristram D Irvine-Fynn1, Andrew J Hardy2, Joseph Cook3, Tom Holt2 and Back & Bloom Team, (1)Aberystwyth University, Department of Geography and Earth Sciences, Aberystwyth, SY23, United Kingdom, (2)Aberystwyth University, Department of Geography and Earth Sciences, Aberystwyth, United Kingdom, (3)University of Sheffield, School of Geography, Sheffield, S10, United Kingdom
Quantifying Local Ablation Rates for the Greenland Ice Sheet Using Terrestrial LIDAR (190808)
Charles Mark Kershner, George Mason University Fairfax, Fairfax, VA, United States, Lincoln H H Pitcher, University of California Los Angeles, Los Angeles, United States, Adam LeWinter, U.S. Army Cold Regions Research and Engineering Laboratory, Hanover, NH, United States, David C Finnegan, US Army Corps of Engineers Cold Regions Research and Engineering Laboratory, Hanover, United States, Brandon T Overstreet, University of Wyoming, Laramie, WY, United States, Clément Miège, University of Utah, Salt Lake City, United States, Matthew G Cooper, University of California Los Angeles, Geography, Los Angeles, CA, United States, Laurence C Smith, Brown University, Institute at Brown for Environment and Society (IBES); Department of Earth, Environmental, and Planetary Sciences (DEEPS), Providence, RI, United States and Asa K Rennermalm, Rutgers University, Geography, New Brunswick, United States
Continuous measurements of surface mass balance, firn compaction, and meltwater retention in Greenland for altimetry validation. (191061)
Santiago de la Peña1, Ian Howat2, Alberto Behar3, Stephen F Price4, Jekan Thanga5, James M Crowell6, Sage Huseas6 and Marco Tedesco7, (1)Byrd Polar Research Center, Columbus, OH, United States, (2)Ohio State University, Byrd Polar & Climate Research Center, Columbus, United States, (3)NASA Jet Propulsion Laboratory, (deceased), Pasadena, CA, United States, (4)Los Alamos National Laboratory, Fluid Dynamics and Solid Mechanics, Los Alamos, United States, (5)Arizona State University, School of Earth and Space Exploration, Tempe, AZ, United States, (6)Arizona State University, Tempe, AZ, United States, (7)Lamont-Doherty Earth Observatory, Palisades, NY, United States
On the Utilization of Ice Flow Models and Uncertainty Quantification to Interpret the Impact of Surface Radiation Budget Errors on Estimates of Greenland Ice Sheet Surface Mass Balance and Regional Estimates of Mass Balance (194407)
Nicole Jeanne Schlegel, University of California Los Angeles, Los Angeles, CA, United States, Eric Y Larour, NASA Jet Propulsion Laboratory, Pasadena, United States, Alex S Gardner, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States, Charlotte Lang, Université de Liège, Liege, Belgium, Charles E Miller, JPL/NASA/Caltech, Pasadena, United States and Michiel R van den Broeke, Utrecht University, Utrecht, Netherlands
FirnCover: Observations on the evolution of firn compaction, firn temperatures and porosity in the interior of the Greenland ice sheet (197765)
Michael J MacFerrin1, C Max Stevens2, William T Colgan3, Edwin D Waddington2 and Waleed Abdalati1, (1)University of Colorado at Boulder, Boulder, United States, (2)University of Washington, Seattle, WA, United States, (3)York University, Toronto, ON, Canada

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