The role of lateral drag in the dynamics of Ice Stream B, Antarctica

Abstract The partitioning of resistive force between the bed and sides of Ice Stream B, Antarctica, is obtained for three large areas that have been measured using repeat aerial photogrammetry. Problems associated with data errors and local variations in ice strength and velocity are reduced by cons...

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Bibliographic Details
Published in:Journal of Glaciology
Main Authors: Whillans, I. M., van der Veen, C. J.
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 1997
Subjects:
Earth-Surface Processes
Antarc*
Antarctica
Ice Stream B
Journal of Glaciology
Online Access:http://dx.doi.org/10.1017/s0022143000003178
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000003178
Description
Summary:Abstract The partitioning of resistive force between the bed and sides of Ice Stream B, Antarctica, is obtained for three large areas that have been measured using repeat aerial photogrammetry. Problems associated with data errors and local variations in ice strength and velocity are reduced by considering the areally averaged budget of forces for each photo block. Results indicate that the bed under Ice Stream B must be very weak and unable to provide much resistance. Mechanical control on this ice stream emanates almost entirely from the lateral margins.

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