C025
Observations and Modeling of Polar Firn
Session ID#: 156903
Session Description:
Firn compaction, where snow is gradually transformed into glacial ice, is an important and fundamental glaciological process. Accurate models, and observations to calibrate those models, are essential for many applications including conversion of satellite altimetry data into ice mass estimates, estimating the meltwater storage and refreezing capacity of firn, and interpreting ice-core paleoclimate records, among others. This session brings together both observational and modeling studies of firn and focuses on the advancement of our understanding of the firn compaction process. We invite contributions from all aspects of firn research and particularly welcome studies of i) advances in firn observational methods, ii) remote sensing of firn, iii) firn model assessments, and iv) development of physics-based firn models.
Index Terms:
0726 Ice sheets [CRYOSPHERE]
0736 Snow [CRYOSPHERE]
0738 Ice [CRYOSPHERE]
0798 Modeling [CRYOSPHERE]
Primary Convener: Kaitlin M Keegan, University of Nevada, Reno, Department of Geological Sciences and Engineering, Reno, United States and Kaitlin Keegan
Convener: Colin Meyer, Dartmouth College, Thayer School of Engineering, Hanover, United States and Kaitlin Keegan
Student/Early Career Convener: Vincent Verjans, Georgia Institute of Technology Main Campus, Atlanta, United States and Kaitlin Keegan
Constraining surface mass balance, firn air content, ICESat-2 volume change, and GRACE/-FO mass change to improve ice-sheet mass balance estimates (Invited) (1048342)
Brooke Medley1, Tyler C Sutterley2, Marissa Eileen Dattler3, Jan Lenaerts4, Thomas B Overly5, Johnny Ryan6, Matthew Siegfried7, Christopher Stevens1,8, Megan Thompson-Munson4 and Nander Wever4, (1)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (2)Applied Physics Laboratory University of Washington, Polar Science Center, Seattle, WA, United States, (3)University of Maryland College Park, College Park, MD, United States, (4)University of Colorado Boulder, Department of Atmospheric and Oceanic Sciences, Boulder, United States, (5)NASA Goddard Space Flight Center, Greenbelt, United States, (6)University of Oregon, Eugene, United States, (7)Colorado School of Mines, Department of Geophysics, Hydrologic Science & Engineering Program, Golden, CO, United States, (8)University of Maryland College Park, Earth System Science Interdisciplinary Center, College Park, United States
Using the Lattice Boltzmann Method to Determine the Intrinsic Permeability of Polar Firn (1069799)
Justin Toller, University of Nevada Reno, Department of Geological Sciences and Engineering, Reno, United States, Michael Gardner, University of Nevada Reno, Department of Geological Sciences and Engineering, Reno, NV, United States and Kaitlin M Keegan, University of Nevada, Reno, Department of Geological Sciences and Engineering, Reno, United States
Local topography’s impact on ice slab formation in Southwest Greenland’s percolation zone (1075217)
Jing Xiao1, Asa K Rennermalm1, Federico Covi2, Regine Hock2,3, Sasha Z Leidman1 and Clément Miège1, (1)Rutgers University New Brunswick, New Brunswick, United States, (2)University of Alaska Fairbanks, Geophysical Institute, Fairbanks, United States, (3)University of Oslo, Department of Geosciences, Oslo, Norway
Ice-Penetrating Radar Observations of Ice Slab Development and Change (Invited) (1098135)
Riley Culberg, Princeton University, Department of Geosciences, Princeton, United States, Ching-Yao Lai, Princeton University, Princeton, United States and Roger Michaelides, Washington University in St. Louis, Department of Earth and Planetary Sciences, St. Louis, United States
Understanding Firn Rheology and Pore Pressurization Through Laboratory Compaction Experiments: Mechanical Analysis (1120604)
Rob M Skarbek1, Kris Houdyshell2, Christine McCarthy3, Elizabeth Case1 and Jonathan Kingslake4, (1)Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States, (2)Lamont-Doherty Earth Observatory, Columbia University, New York, United States, (3)Lamont-Doherty Earth Observatory, Columbia University, Palisades, United States, (4)Lamont-Doherty Earth Observatory, Palisades, NY, United States
Polar Firn Properties : Models, Measurements and Effects on Microwave Brightness Temperatures (1124616)
Haokui Xu, University of Michigan Ann Arbor, Department of Electrical Engineering and Computer Science, Ann Arbor, United States, Brooke Medley, NASA Goddard Space Flight Center, Greenbelt, MD, United States, Leung Tsang, University of Michigan, Ann Arbor, United States, Joel Johnson, Ohio State University, Department of Electrical and Computer Engineering, Columbus, United States, Kenneth C. Jezek, Byrd Polar and Climate Research Center, Columbus, United States, Marco Brogioni, Institute of Applied Physics “Nello Carrara”, Sesto Fiorentino, Italy and Lars Kaleschke, Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany
Revealing Grain Size Variability Across the Percolation Zone of the Greenland Ice Sheet through Hyperspectral Imaging of Shallow Firn Cores (1127587)
Ian McDowell, University of Nevada, Reno, Graduate Program of Hydrologic Sciences, Reno, NV, United States, McKenzie Skiles, University of Utah, Geography, Salt Lake City, United States, Kaitlin M Keegan, University of Nevada, Reno, Department of Geological Sciences and Engineering, Reno, United States, Erich C Osterberg, Dartmouth College, Department of Earth Sciences, Hanover, NH, United States, Robert L Hawley, Dartmouth College, Department of Earth Sciences, Hanover, United States and Hans-Peter Marshall, Boise State University, Department of Geosciences, Boise, ID, United States
Preferential Meltwater Infiltration and Refreezing: a Multiphase Model (1128807)
Adrian Moure1, Nathan Jones1, Joshua Pawlak2, Colin Meyer3 and Xiaojing Fu1, (1)California Institute of Technology, Department of Mechanical and Civil Engineering, Pasadena, CA, United States, (2)California Institute of Technology, Department of Mechanical and Civil Engineering, Pasadena, United States, (3)Dartmouth College, Thayer School of Engineering, Hanover, United States
Combined GNSS Reflectometry/Refractometry for Continuous In Situ Surface Mass Balance Estimation on an Antarctic Ice Shelf (1150073)
Ladina Steiner1, Tzvetan Simeonov2, Holger Schmitthüsen1, Jens Wickert3 and Olaf Eisen1, (1)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (2)Deutscher Wetterdienst, Offenbach, Germany, (3)GFZ German Research Centre for Geosciences, Potsdam, Germany
Understanding Firn Rheology and Pore Pressurization Through Laboratory Compaction Experiments: Microstructural Analysis (1154406)
Kris Houdyshell, Lamont-Doherty Earth Observatory, Columbia University, New York, United States, Rob M Skarbek, Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States, Christine McCarthy, Lamont-Doherty Earth Observatory, Columbia University, Palisades, United States, Elizabeth Case, Cornell University, Mechanical Engineering, Ithaca, United States and Jonathan Kingslake, Lamont-Doherty Earth Observatory, Palisades, NY, United States
Effects of Snow Conditions on Antarctic Air-Dropped Penetrator (1200699)
Alex Miller1, Michael Brown Jr.2, Aaron Makikalli2, Daniel Pekka Poe3, Christopher Eckert4, Chester A Ruszczyk4, Jeffrey Hoffman2 and Pedro Elosegui4, (1)Massachusetts Institute of Technology, Cambridge, MA, United States, (2)Massachusetts Institute of Technology, Cambridge, United States, (3)Space Exploration Technologies Corp., Hawthorne, United States, (4)MIT Haystack Observatory, Westford, United States
