EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Inferring controls on basal drag in the Amundsen Sea sector of Antarctica

Robert Arthern, Rosie Williams, Kelly Hogan, Alex Brisbourne, Andrew Smith, and Tom Jordan
Robert Arthern et al.
  • British Antarctic Survey, Cambridge, United Kingdom of Great Britain and Northern Ireland (

We consider a variety of ways that the basal drag that acts to resist the sliding of an ice sheet can be inferred from satellite observations, or from in situ observations. Three approaches are considered here. (1) use of inverse methods combined with large scale models of ice flow. (2) spectral analysis of basal topography combined with a theory of ice flow near small scale undulations, and (3) seismic methods that probe the physical characteristics of the subglacial sediment. Consideration is given to which sliding relationships are consistent with the available observations, and to identifying measurements that could help reduce ambiguity in sliding laws.

How to cite: Arthern, R., Williams, R., Hogan, K., Brisbourne, A., Smith, A., and Jordan, T.: Inferring controls on basal drag in the Amundsen Sea sector of Antarctica, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-10035,, 2020

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Improved resolution to correct blurred text. Added Buckingham 2000 reference.
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