C32A:
Advances in Understanding Processes at the Beds of Glaciers and Ice Sheets II

Submit an Abstract to this Session



Session ID#: 35083

Session Description:
The dynamic behavior of land-based and marine-terminating glaciers depends on processes at the ice-bed interface that are difficult to observe directly. However, these processes are crucial for understanding ice movement and the development of landscapes under past and future climates.

This session includes contributions that focus on glaciological, geomorphic, geochemical, and geobiological phenomena at glacier beds. Processes of interest include ice and bed deformation, basal slip, subglacial hydrology, subglacial erosion and sediment transport, development of subglacial landforms and stratigraphy, and microbial alteration of the basal environment, among others. We invite a range of approaches that address the spatiotemporal scales of these processes, including field and geophysical observations, laboratory experiments, sedimentological and morphometric studies, and modeling efforts.
Primary Convener:  Matthew Siegfried, Stanford University, Department of Geophysics, Stanford, CA, United States
Conveners:  Lucas Zoet, University of Wisconsin Madison, Department of Geoscience, Madison, United States, Knut A Christianson, University of Washington, Department of Earth and Space Sciences, Seattle, United States and Neal R Iverson, Iowa State University, Geological and Atmospheric Sciences, Ames, IA, United States
Chairs:  Knut A Christianson, University of Washington, Earth and Space Sciences, Seattle, United States and Matthew Siegfried, Stanford University, Geophysics, Stanford, CA, United States
OSPA Liaison:  Lucas Zoet, University of Wisconsin Madison, Department of Geoscience, Madison, United States

Cross-Listed:
  • B - Biogeosciences
  • EP - Earth and Planetary Surface Processes
  • G - Geodesy
  • NS - Near Surface Geophysics
Index Terms:

0720 Glaciers [CRYOSPHERE]
0726 Ice sheets [CRYOSPHERE]
0774 Dynamics [CRYOSPHERE]
0776 Glaciology [CRYOSPHERE]

Abstracts Submitted to this Session:

Microbial processes at the beds of glaciers and ice sheets: a look at life below the Whillans Ice Stream (Invited) (210338)
Jill Mikucki, University of Tennessee, Department of Microbiology, Knoxville, United States, Richard Campen, University of Tennessee, Microbiology, Knoxville, TN, United States, Samantha Vancleave, University of Tennessee, Knoxville, United States, Prof. Reed P Scherer, PhD, Northern Illinois Univ, De Kalb, United States, Jason James Coenen, Northern Illinois University, DeKalb, United States, Ross D Powell, Northern Illinois Univ., Geology and Environmental Geosciences, De Kalb, IL, United States and Slawek M Tulaczyk, University of California Santa Cruz, Earth and Planetary Sciences, Santa Cruz, United States
Crushing of Subglacial Lake Sediment as a Source of Bio-utilisable Gases. (224198)
Beatriz Gill Olivas, School of Geographical Sciences, University of Bristol, Bristol, United Kingdom, Jon Telling, Newcastle University, Department of Civil Engineering and Geosciences, Tyne and Wear, United Kingdom, Alexander B Michaud, Montana State University, Bozeman, United States, Mark L Skidmore, Stockholm University, Department of Physical Geography, Stockholm, Sweden, John C Priscu, Desert Research Institute, Division of Earth and Ecosystem Sciences, Reno, United States and Martyn Tranter, University of Bristol, School of Geographical Sciences, Bristol, United Kingdom
Patterned basal seismicity shows sub-ice stream bedforms (262767)
Grace Barcheck, Cornell University, Earth and Atmospheric Sciences, Ithaca, United States, Slawek M Tulaczyk, University of California Santa Cruz, Earth and Planetary Sciences, Santa Cruz, United States and Susan Y Schwartz, University of California Santa Cruz, Earth and Planetary Sciences, Santa Cruz, CA, United States
Bed Conditions at WAIS Divide, West Antarctica, and Implications for Ice Sheet Stability (282184)
Sridhar Anandakrishnan, Pennsylvania State University, Department of Geosciences and Earth and Environmental Systems Institute, University Park, United States and Jacob Marten, Pennsylvania State University Main Campus, Geosciences, University Park, PA, United States
The subglacial roughness of Antarctica: Analogs, interpretation and implications for ice thickness uncertainities (292771)
Duncan A Young1, Cyril Grima2, Jamin Stevens Greenbaum1, Lucas Beem2, Marie G Cavitte1, Enrica Quartini3, Scott D Kempf4, Jason L Roberts5, Martin J Siegert6, Catherine Ritz7 and Donald D Blankenship8, (1)University of Texas at Austin, University of Texas Institute for Geophysics, Austin, TX, United States, (2)University of Texas, Institute for Geophysics, Austin, TX, United States, (3)Cornell University, Ithaca, United States, (4)University of Texas Institute for Geophysics, Austin, United States, (5)Australian Antarctic Division, Kingston, Australia, (6)Imperial College London, London, United Kingdom, (7)Univ. Grenoble Alpes, Institut des Géosciences de l'Environment, F-38041, Grenboble, France, (8)University of Texas, Institute for Geophysics, Austin, United States
Subglacial roughness of the Greenland Ice Sheet: relationship with contemporary ice dynamics and geology. (250989)
Michael Cooper1, Thomas Jordan2, Chris Williams2, Martin J Siegert3 and Jonathan L Bamber2, (1)University of Bristol, School of Geographical Sciences, Bristol, BS8, United Kingdom, (2)University of Bristol, School of Geographical Sciences, Bristol, United Kingdom, (3)Imperial College London, London, United Kingdom
Constraining Greenland basal water extent and drainage morphology from radar reflectivity and specularity analysis (289351)
Winnie Chu, Stanford University, Geophysics, Stanford, CA, United States, Dustin M Schroeder, Stanford University, Department of Electrical Engineering, Stanford, United States, Helene L Seroussi, Jet Propulsion Laboratory, Pasadena, CA, United States, Timothy T Creyts, Columbia University-LDEO, Palisades, NY, United States, Robin Elizabeth Bell, Lamont-Doherty Earth Observatory, Palisades, NY, United States and John Drysdale Paden, Center for Remote Sensing of Ice Sheets, Lawrence, KS, United States
Greenland deep boreholes inform on sliding and deformation of the basal ice (293309)
Dorthe Dahl-Jensen, University of Copenhagen, Physics of ice, climate and earth, Niels Bohr Institute, Copenhagen, Denmark

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