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Record #96593:

Two-dimensional thermo-mechanical modelling of flow and depth-age profiles near the ice divide in central Greenland / Dorthe Dahl-Jensen.

Title: Two-dimensional thermo-mechanical modelling of flow and depth-age profiles near the ice divide in central Greenland / Dorthe Dahl-Jensen.
Author(s): Dahl-Jensen, Dorthe.
Date: 1989.
Publisher: Cambridge: International Glaciological Society
In: Annals of Glaciology. (1989.), Vol. 12 (1989)
Abstract: Results show that surface strain-rates are increased by 50% of values found 15 km down-stream and that basal temperatures rise by 3°C. Estimates of depth-age distribution in vicinity of Crête show that isochrones rise at dome. Model calculations predict 1600 m of Holocene ice, 1000 m of Wisconsin ice and 400 m of ice older than 115 ka. 15 km down-stream from dome, thickness of ice older than 115 ka will be reduced by 15%. These calculations assume that ice thickness at dome is time-invariant. Existence of old ice depends on basal temperature. Estimates of basal temperature depend strongly on past accumulation rates and on geothermal heat flux, but ice has probably been below pressure-melting point throughout last glacial period.
Notes:

Annals of Glaciology. Vol. 12 :31-36 (1989).

Keywords: 551.324.5 -- Land ice, flow.
551.32 -- Glaciology.
551.324 -- Land ice.
551.324.412 -- Land ice, temperature.
E5 -- Glaciology: land ice.
(*38) -- Greenland.
SPRI record no.: 96593

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520 3# ‡aResults show that surface strain-rates are increased by 50% of values found 15 km down-stream and that basal temperatures rise by 3°C. Estimates of depth-age distribution in vicinity of Crête show that isochrones rise at dome. Model calculations predict 1600 m of Holocene ice, 1000 m of Wisconsin ice and 400 m of ice older than 115 ka. 15 km down-stream from dome, thickness of ice older than 115 ka will be reduced by 15%. These calculations assume that ice thickness at dome is time-invariant. Existence of old ice depends on basal temperature. Estimates of basal temperature depend strongly on past accumulation rates and on geothermal heat flux, but ice has probably been below pressure-melting point throughout last glacial period.
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650 07 ‡a551.32 -- Glaciology.‡2udc
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