C33E:
Advances in Understanding Processes at the Beds of Glaciers and Ice Sheets III

Submit an Abstract to this Session



Session ID#: 35089

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:  Lucas Zoet, University of Wisconsin Madison, Department of Geoscience, Madison, United States and Matthew Siegfried, Stanford University, Geophysics, Stanford, CA, United States
OSPA Liaison:  Knut A Christianson, University of Washington, Earth and Space Sciences, Seattle, 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:

The effect of periodic forcing on the stability transition of ice friction (278132)
Christine McCarthy, Columbia University of New York, Palisades, United States, Heather M Savage, Columbia University of New York, Palisades, NY, United States, Rob M Skarbek, Lamont -Doherty Earth Observatory, Palisades, NY, United States and Meredith Nettles, Columbia University, Lamont-Doherty Earth Observatory, Palisades, United States
Subglacial drainage effects on surface motion on a small surge type alpine glacier on the St. Elias range, Yukon Territory, Canada. (217172)
Camilo Rada1, Christian Schoof2, Matt A King3, Gwenn E Flowers4 and Eldad Haber2, (1)University of British Columbia, Vancouver, BC, Canada, (2)University of British Columbia, Earth, Ocean and Atmospheric Sciences, Vancouver, BC, Canada, (3)University of Tasmania, Surveying and Spatial Sciences, School of Technology, Environments and Design, Hobart, TAS, Australia, (4)Simon Fraser University, Department of Earth Sciences, Burnaby, BC, Canada
Glacial Erosion Driven by Seasonal Shifts in Meltwater Drainage (Invited) (208521)
Sofie Vej Ugelvig, Aarhus University, Aarhus C, Denmark and David L Egholm, Aarhus University, Aarhus, Denmark
Properties of the subglacial till inferred from supraglacial lake drainage (251943)
Prof. Jerome A Neufeld, University of Cambridge, Institute for Energy and Environmental Flows, Department of Earth Sciences & Department of Applied Mathematics and Theoretical Physics, Cambridge, United Kingdom and Duncan Hewitt, University of Cambridge, Department of Applied Mathematics and Theoretical Physics, Cambridge, United Kingdom
Can we Relate Basal Ice Mechanics to Seismic Observations of the Bed? (252959)
Teresa Kyrke-Smith1, Gudmundur Hilmar Gudmundsson1 and Patrick E. Farrell2, (1)NERC British Antarctic Survey, Cambridge, United Kingdom, (2)University of Oxford, Mathematical Institute, Oxford, United Kingdom
A new drag spool for measuring basal sliding and till deformation (259220)
Martin Truffer1, Dale Pomraning1, Bertrand Dushime2, Jason M Amundson3, Roman J Motyka4 and Chris Larsen1, (1)University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK, United States, (2)University of Alaska Fairbanks, Fairbanks, United States, (3)University of Alaska Southeast, Department of Natural Sciences, Juneau, AK, United States, (4)Univ Alaska-Geophysical Inst, Juneau, AK, United States
Modeling subglacial sediment discharge in 1-dimension: comparison with measurments and implications for glacial retreat (234467)
Ian Arburua Delaney, University of Lausanne, Lausanne, Switzerland, Mauro Werder, Swiss Federal Institute for Forest, Snow and Landscape Research (WLS), Laboratory of Hydraulics, Hydrology and Glaciology (VAW), Birmensdorf, Switzerland and Daniel Farinotti, ETH Zurich, Laboratory of Hydraulics, Hydrology and Glaciology (VAW), Zurich, Switzerland; WSL Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, Switzerland
Debris-dependent Rheological Heterogeneity within Stratified Basal Ice (226258)
Nathan R Hopkins, Minot State University, Minot, ND, United States, Edward B Evenson, Lehigh University, Bethlehem, PA, United States, Dario Bilardello, University of Minnesota, Institute for Rock Magnetism, Minneapolis, United States, Claudio Berti, Lehigh University, Earth & Environmental Sciences, Bethlehem, PA, United States and Kenneth P Kodama, Lehigh University, Department of Earth and Environmental Sciences, Bethlehem, PA, United States

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