Ice-flow properties at Dome Summit South, Law Dome, East Antarctica

Ice-flow properties within a polar ice sheet are examined using the comprehensive data gathered from ice-core drilling by Australian National Antarctic Research Expeditions (ANARE) at Dome Summit South (DSS), on Law Dome, East Antarctica. Using the shear strain rates derived from borehole inclinatio...

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Bibliographic Details
Published in:Annals of Glaciology
Main Authors: Wang, W, Warner, RC, Budd, WF
Format: Article in Journal/Newspaper
Language:English
Published: International Glaciological Society 2002
Subjects:
Earth Sciences
Physical Geography and Environmental Geoscience
Glaciology
Antarctic
East Antarctica
Law Dome
Annals of Glaciology
Antarc*
Antarctica
ice core
Ice Sheet
Online Access:https://doi.org/10.3189/172756402781816924
http://ecite.utas.edu.au/26100
Description
Summary:Ice-flow properties within a polar ice sheet are examined using the comprehensive data gathered from ice-core drilling by Australian National Antarctic Research Expeditions (ANARE) at Dome Summit South (DSS), on Law Dome, East Antarctica. Using the shear strain rates derived from borehole inclination measurements we demonstrate the need to modify the ice-flow relations to treat enhanced shear deformation deep within the ice sheet. We show that the relation between enhanced flow and the measured crystallographic properties is generally in accord with expectations, at least in the upper parts of the ice sheet, but it becomes clear that nearer to the bedrock the situation is more complicated. We also compare the observed shear strain-rate profile with results from a model that describes flow enhancement as a function of the applied stresses.

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