Annals of Glaciology 23 1996 © International Glaciological Society Ice-sheet surging and ice-strealll forlllation

ABSTRACT. A simplified model of ice-sheet behayiour is described. I t combines the assumptions of rapid ice flow, high viscous actiyation energy and realistic sediment-based sliding dynamics to form a non-linear diffusion-type equation which can display relaxation oscillations analogous to those of...

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Bibliographic Details
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Subjects:
Cabot
Hudson
Hudson Strait
Siple
Siple Coast
Antarc*
Antarctica
Ice Sheet
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.303.6903
http://www.maths.ox.ac.uk/%7Efowler/papers/1996.6.pdf
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Summary:ABSTRACT. A simplified model of ice-sheet behayiour is described. I t combines the assumptions of rapid ice flow, high viscous actiyation energy and realistic sediment-based sliding dynamics to form a non-linear diffusion-type equation which can display relaxation oscillations analogous to those of surging glaciers, and which may be relevant to large-scale surges of the Hudson Strait and Cabot Strait ice streams of the Laurentide ice sheet. When the physics of this model is applied to a laterally extensi\'e unidirectional ice flow, such as that in the Siple Coast of Antarctica, an appropriate mechanism may exist for the spon taneous generation of ice streams. 1.

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