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INT GLACIOL SOC
In:
EPIC3Journal of Glaciology, INT GLACIOL SOC, 60(220), pp. 215-232, ISSN: 0022-1430
Publication Date:
2014-06-23
Description:
We study the presence and effect of subglacial water on the
motion of the inland ice in western Dronning Maud Land. A
full-Stokes model including three routing schemes for a thin film of
subglacial water and a modification of a Weertman-type sliding
relation to account for higher sliding velocities under wet basal
conditions were used to perform 200 ka spin-up simulations on a
2.5 km grid. Subsequent 30 ka simulations with wet and dry basal
conditions were analysed for the effects of sliding on the thermal
regime and velocities. The occurrence of the major ice streams in
this area is mainly controlled by the ice and bedrock geometry.
Smaller glaciers only appear as pronounced individual glaciers, when
subglacial water is taken into account. The thermal regime is
affected by creep instabilities produced by an ice rheology
including a microscopic water content, leading to a cyclic behaviour
on millennial time scales of the ice flow and occurrence of temperate
ice at the base.
Repository Name:
EPIC Alfred Wegener Institut
Type:
Article
,
isiRev
Format:
application/pdf
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