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Record #96604:

Numerical models of ice-shelf flow: ideal/real / Manfred A. Lange, Douglas R. MacAyeal.

Title: Numerical models of ice-shelf flow: ideal/real / Manfred A. Lange, Douglas R. MacAyeal.
Author(s): Lange, Manfred A.
MacAyeal, Douglas R.
Date: 1989.
In: Annals of Glaciology. (1989.), Vol. 12 (1989)
Abstract: Presents model calculations that describe flow of ice shelves of different configurations. Considers "ideal" models with well-defined boundary conditions and simple geometry in order to explore response of ice shelf to transient variations in ice-stream input. Increasing complexity of model allows better understanding of ice-shelf behaviour without complications arising from consideration of natural ice shelves. Dissipation of ice-thickness variations caused by ice-stream transience is strongly influenced by ice rheology and presence of ice rise alters velocity field of adjacent ice, due to changes in ice-stream input. With models of "real" ice shelves, ability of numerical models to test working hypotheses on ice-shelf thickness distributions is demonstrated. Ice velocities obtained with diagnostic models of Filchner-Ronne ice shelf that use different ice-thickness distributions are compared with measured ice velocities; this demonstrates that model employing regions of thin ice in central area yields velocities significantly different from field data. Concludes that zones of thin ice on ice shelf are unlikely.
Notes:

Annals of Glaciology. Vol. 12 :97-103 (1989).

Keywords: 551.324.54 -- Land ice, flow of particular glaciers: Filchner-Ronne ice shelves.
551.32 -- Glaciology.
551.324.28 -- Ice shelves: Filchner-Ronne ice shelves.
519.673 -- Modelling.
E5 -- Glaciology: land ice.
(*7) -- Antarctic regions.
(*728) -- Filchner-Ronne ice shelves.
SPRI record no.: 96604

MARCXML

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245 10 ‡aNumerical models of ice-shelf flow :‡bideal/real /‡cManfred A. Lange, Douglas R. MacAyeal.
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500 ## ‡aAnnals of Glaciology. Vol. 12 :97-103 (1989).
520 3# ‡aPresents model calculations that describe flow of ice shelves of different configurations. Considers "ideal" models with well-defined boundary conditions and simple geometry in order to explore response of ice shelf to transient variations in ice-stream input. Increasing complexity of model allows better understanding of ice-shelf behaviour without complications arising from consideration of natural ice shelves. Dissipation of ice-thickness variations caused by ice-stream transience is strongly influenced by ice rheology and presence of ice rise alters velocity field of adjacent ice, due to changes in ice-stream input. With models of "real" ice shelves, ability of numerical models to test working hypotheses on ice-shelf thickness distributions is demonstrated. Ice velocities obtained with diagnostic models of Filchner-Ronne ice shelf that use different ice-thickness distributions are compared with measured ice velocities; this demonstrates that model employing regions of thin ice in central area yields velocities significantly different from field data. Concludes that zones of thin ice on ice shelf are unlikely.
650 07 ‡a551.324.54 -- Land ice, flow of particular glaciers: Filchner-Ronne ice shelves.‡2udc
650 07 ‡a551.32 -- Glaciology.‡2udc
650 07 ‡a551.324.28 -- Ice shelves: Filchner-Ronne ice shelves.‡2udc
650 07 ‡a519.673 -- Modelling.‡2udc
650 07 ‡aE5 -- Glaciology: land ice.‡2local
651 #7 ‡a(*7) -- Antarctic regions.‡2udc
651 #7 ‡a(*728) -- Filchner-Ronne ice shelves.‡2udc
700 1# ‡aMacAyeal, Douglas R.
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