C31B:
Advances in Understanding Processes at the Beds of Glaciers and Ice Sheets I

Submit an Abstract to this Session



Session ID#: 35077

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:

High-Resolution Digitization of the Film Archive of SPRI/NSF/TUD Radar Sounding of the Antarctic Ice Sheet (207562)
Dustin M Schroeder1, Julian A. Dowdeswell2, Emma Mackie3, Katherine I Vega4, John R Emmons5, Keith Winstein5, Robert G. Bingham6 and Toby J Benham7, (1)Stanford University, Department of Electrical Engineering, Stanford, United States, (2)Scott Polar Research Institute, University of Cambridge, Cambridge, United Kingdom, (3)Stanford University, Department of Geophysics, Stanford, United States, (4)Stanford University, Geophysics, Stanford, CA, United States, (5)Stanford University, Computer Science, Stanford, CA, United States, (6)University of Edinburgh, School of GeoSciences, Edinburgh, United Kingdom, (7)Scott Polar Research Institute, Cambridge, United Kingdom
Lasting Effects of Glacial Lake Outburst Floods on Subglacial Drainage Networks (260273)
Mark Robbins1, Ingrid L Hendy1, Jeremy N Bassis2, Emily Stevenson3 and Sarah Aciego4,5, (1)University of Michigan Ann Arbor, Earth and Environmental Sciences, Ann Arbor, MI, United States, (2)University of Michigan, Climate and Space Sciences and Engineering, Ann Arbor, United States, (3)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Earth Surface Geochemistry, Potsdam, Germany, (4)University of Wyoming, Department of Geology and Geophysics, Laramie, WY, United States, (5)University of Michigan, Ann Arbor, MI, United States
Subglacial meltwater channels on the Antarctic continental shelf (224216)
James Kirkham1, Kelly Hogan2, Julian A. Dowdeswell3, Robert D Larter2, Neil S Arnold4, Frank Oliver Nitsche5 and Nicholas R Golledge6, (1)University of Cambridge, Cambridge, United Kingdom, (2)British Antarctic Survey, Cambridge, United Kingdom, (3)Scott Polar Research Institute, University of Cambridge, Cambridge, United Kingdom, (4)University of Cambridge, Scott Polar Research Institute, Cambridge, United Kingdom, (5)Lamont-Doherty Earth Observatory, Palisades, NY, United States, (6)GNS Science, Lower Hutt, New Zealand
Meltwater drainage beneath ice sheets: What can we learn from uniting observations of paleo- and contemporary subglacial hydrology? (297959)
Lauren M Simkins, Rice University, Department of Earth, Environment and Planetary Sciences, Houston, TX, United States, Sasha P Carter, Mesa College, Physical Sciences Department, San Diego, CA, United States; University of San Diego, San Diego, CA, United States, Sarah L. Greenwood, Stockholm University, Department of Geological Sciences, Stockholm, Sweden and Dustin M Schroeder, Stanford University, Department of Electrical Engineering, Stanford, United States
Transient Conditions at the Ice/bed Interface Under a Palaeo-ice Stream Derived from Numerical Simulation of Groundwater Flow and Sedimentological Observations in a Drumlin Field, NW Poland (216395)
Piotr Hermanowski, Adam Mickiewicz University, Poznań, Poland and Jan A Piotrowski, Aarhus University, Aarhus, Denmark
The Distribution and Magnitude of Glacial Erosion on 103-year Timescales at Engabreen, Norway (285797)
Cari Rand, Tulane University of Louisiana, New Orleans, LA, United States and Brent M Goehring, Tulane University of Louisiana, Department of Earth and Environmental Sciences, New Orleans, LA, United States
Diagnosing ice sheet grounding line stability from landform morphology (287369)
Sarah L. Greenwood, Stockholm University, Department of Geological Sciences, Stockholm, Sweden, Lauren M Simkins, Rice University, Department of Earth, Environment and Planetary Sciences, Houston, TX, United States and John B Anderson, Rice University, Department of Earth, Environmental and Planetary Sciences, Houston, United States

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