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Record #96591:

The dynamics of the Antarctic ice sheet / William F. Budd, Dick Jenssen.

Title: The dynamics of the Antarctic ice sheet / William F. Budd, Dick Jenssen.
Author(s): Budd, William F.
Jenssen, Dick.
Date: 1989.
Publisher: Cambridge: International Glaciological Society
In: Annals of Glaciology. (1989.), Vol. 12 (1989)
Abstract: Three-dimensional dynamic-thermodynamic model has been developed to simulate past, present and future behaviour. Present ice velocities depend on deep ice temperatures, which, in turn, depend on past changes of ice sheet, including surface temperature, accumulation rate, and ice thickness. Basal temperatures also strongly dependent on geothermal heat flux. Model has therefore been used to study effect on basal temperatures of changes to geothermal heat flux, as well as to past changes of surface temperature and accumulation rate based on results obtained from Vostok deep-ice core. Also used to compute distribution of surface velocity required to balance present accumulation rate and dynamics velocity based on stress, temperature, and flow properties of ice, for internal deformation, plus component due to ice sliding. Velocities are compared to observed surface velocities in east Antarctica to assess state of balance and performance of dynamics formulation.
Notes:

Annals of Glaciology. Vol. 12 :16-22 (1989).

Keywords: 551.324.54 -- Land ice, flow of particular glaciers.
551.32 -- Glaciology.
551.324 -- Land ice.
551.324.24 -- Ice sheets and caps.
551.324.43 -- Land ice, regime and mass balance.
E5 -- Glaciology: land ice.
(*7) -- Antarctic regions.
SPRI record no.: 96591

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245 14 ‡aThe dynamics of the Antarctic ice sheet /‡cWilliam F. Budd, Dick Jenssen.
260 ## ‡aCambridge :‡bInternational Glaciological Society,‡c1989.
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500 ## ‡aAnnals of Glaciology. Vol. 12 :16-22 (1989).
520 3# ‡aThree-dimensional dynamic-thermodynamic model has been developed to simulate past, present and future behaviour. Present ice velocities depend on deep ice temperatures, which, in turn, depend on past changes of ice sheet, including surface temperature, accumulation rate, and ice thickness. Basal temperatures also strongly dependent on geothermal heat flux. Model has therefore been used to study effect on basal temperatures of changes to geothermal heat flux, as well as to past changes of surface temperature and accumulation rate based on results obtained from Vostok deep-ice core. Also used to compute distribution of surface velocity required to balance present accumulation rate and dynamics velocity based on stress, temperature, and flow properties of ice, for internal deformation, plus component due to ice sliding. Velocities are compared to observed surface velocities in east Antarctica to assess state of balance and performance of dynamics formulation.
650 07 ‡a551.324.54 -- Land ice, flow of particular glaciers.‡2udc
650 07 ‡a551.32 -- Glaciology.‡2udc
650 07 ‡a551.324 -- Land ice.‡2udc
650 07 ‡a551.324.24 -- Ice sheets and caps.‡2udc
650 07 ‡a551.324.43 -- Land ice, regime and mass balance.‡2udc
650 07 ‡aE5 -- Glaciology: land ice.‡2local
651 #7 ‡a(*7) -- Antarctic regions.‡2udc
700 1# ‡aJenssen, Dick.
773 0# ‡7nnas ‡tAnnals of Glaciology. ‡gVol. 12 (1989) ‡wSPRI-60773
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