ES32A:
Modern and Ancient Ice Streams and Their Megalineated Beds I

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Session Title - en français: Les courants glaciaires, anciens et modernes, et leur empreinte géomorphologique

Session ID#: 6040

Session Description:
Ice streams largely control ice sheet dynamics and evolution, which in turn affect climate and sea level on a global scale. However, uncertainties persist about several aspects of ice stream systems including the complex interplay of various factors such as geology, topography, water, and the transient changes in thermomechanical conditions along their beds. The purpose of this session is to explore and assess current understanding of the origin and evolution of ice stream beds from their onset zone to their terminus by bringing together scientists who are conducting research on sub-ice stream erosion, sediment production, and other important aspects of past and modern ice stream systems. We encourage submissions of research results from various locations and from a wide range of techniques including geological and geomorphological methods, geophysics, and numerical modelling to understand ice streams and the evolution of their megalineated beds.
OSPA Liaison:  Martin Ross, University of Waterloo, Waterloo, ON, Canada
Chairs:  Martin Ross, University of Waterloo, Waterloo, ON, Canada, Nicholas Eyles, University of Toronto, Claremont, ON, Canada and Niko Putkinen, Geological Survey of Finland, Kokkola, Finland
Primary Convener:  Martin Ross, University of Waterloo, Waterloo, ON, Canada
Convener:  Nicholas Eyles, University of Toronto, Claremont, ON, Canada
Index Terms:

0726 Ice sheets [CRYOSPHERE]
0730 Ice streams [CRYOSPHERE]
3045 Seafloor morphology, geology, and geophysics [MARINE GEOLOGY AND GEOPHYSICS]
6969 Remote sensing [RADIO SCIENCE]
Co-Sponsor(s):
  • MRG - Mapping and Regional Geology
  • PP - Paleoceanography and Paleoclimatology
  • SG - Sedimentary Geology and Paleobiology

Abstracts Submitted to this Session:

ES32A-01
The Geomorphology of Ice Stream Beds: Recent Progress and Future Challenges (Invited) (34163)
Chris Stokes, Durham University, Department of Geography, Durham, United Kingdom and Martin Margold, University of Durham, Durham, United Kingdom
ES32A-02
Streamlined Landforms in Sweden: Core Types, Log-Normal Distributions and the Geomorphological Continuum (33886)
Thomas Dowling1, Matteo Spagnolo2 and Per Moller1, (1)Lund University, Lund, Sweden, (2)University of Aberdeen, Aberdeen, United Kingdom
ES32A-03
Bed Deformation beneath the Baltic Ice Stream, Southern Sweden: Implications for the evolution of the subglacial system beneath short-lived, episodic ice streams (35836)
Nathan R Hopkins1, Edward B Evenson1, Johan Kleman2 and Kenneth P Kodama3, (1)Lehigh University, Earth and Environmental Sciences, Bethlehem, PA, United States, (2)Stockholm University, Department of Physical Geography, Stockholm, Sweden, (3)Lehigh University, Department of Earth and Environmental Sciences, Bethlehem, PA, United States
ES32A-05
Using sediment provenance to study ice streams in the Weddell Sea embayment of Antarctica (Invited) (36064)
Trevor Williams1, Kathy Licht2, Sidney R Hemming3,4, Gerhard Kuhn5, Tina van de Flierdt6, Stefanie A Brachfeld7, Adi Torfstein8, James Smith9, Claus-Dieter Hillenbrand9, Michael J Flowerdew10 and Peter Braddock11, (1)Lamont-Doherty Earth Observ, Palisades, United States, (2)Indiana University Indianapolis, Department of Earth and Environmental Sciences, Indianapolis, United States, (3)Columbia University, Department of Earth and Environmental Sciences, New York, United States, (4)Lamont-Doherty Earth Observatory, Palisades, NY, United States, (5)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research (AWI), Bremerhaven, Germany, (6)Imperial College London, London, United Kingdom, (7)Montclair State University, Earth and Environmental Studies, Montclair, NJ, United States, (8)Hebrew University of Jerusalem, Institute of Earth Sciences, Jerusalem, Israel, (9)British Antarctic Survey, Cambridge, United Kingdom, (10)CASP, Cambridge, United Kingdom, (11)IUPUI, Indianapolis, IN, United States
ES32A-06
Bedrock Streamlining in Palaeo-ice streams: a Review of Bedrock Properties, Formation Mechanisms and Glaciological Implications (34120)
Maarten Krabbendam1, Nicholas Eyles2, Niko Putkinen3 and Tom Bradwell1, (1)British Geological Survey, Edinburgh, United Kingdom, (2)University of Toronto, Scarborough, ON, Canada, (3)Geological Survey of Finland, Kokkola, Finland
ES32A-07
Erosional Origin for Drumlins by Subglacial Erodent Layers: A Tribological Model (34376)
Nicholas Eyles, University of Toronto, Claremont, ON, Canada, Shane Sookhan, University of Toronto at Scarborough, Earth Science, Toronto, ON, Canada and Niko Putkinen, Geological Survey of Finland, Kokkola, Finland
See more of: Earth Surface Processes