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Results from the EISMINT model intercomparison : the effects of thermomechanical coupling

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Title: Results from the EISMINT model intercomparison : the effects of thermomechanical coupling
Authors: Payne, A. J. Browse this author
Huybrechts, P. Browse this author
Abe-Ouchi, A. Browse this author
Calov, R. Browse this author
Fastook, J. L. Browse this author
Greve, R. Browse this author
Marshall, S. J. Browse this author
Marsiat, I. Browse this author
Ritz, C. Browse this author
Tarasov, L. Browse this author
Thomassen, M. P. A. Browse this author
Keywords: Ice sheet
Model intercomparison
Thermomechanical coupling
Climate change
Issue Date: Mar-2000
Publisher: International Glaciological Society
Journal Title: Journal of Glaciology
Volume: 46
Issue: 153
Start Page: 227
End Page: 238
Publisher DOI: 10.3189/172756500781832891
Abstract: This paper discusses results from the second phase of the European Ice Sheet Modelling Initiative (EISMINT). It reports the intercomparison of ten operational ice-sheet models and uses a series of experiments to examine the implications of thermomechanical coupling for model behaviour. A schematic, circular ice sheet is used in the work which investigates both steady states and the response to stepped changes in climate. The major finding is that the radial symmetry implied in the experimental design can, under certain circumstances, break down with the formation of distinct, regularly spaced spokes of cold ice which extended from the interior of the ice sheet outward to the surrounding zone of basal melt. These features also manifest themselves in the thickness and velocity distributions predicted by the models. They appear to be a common feature to all of the models which took part in the intercomparison, and may stem from interactions between ice temperature, flow and surface form. The exact nature of these features varies between models, and their existence appears to be controlled by the overall thermal regime of the ice sheet. A second result is that there is considerable agreement between the models in their predictions of global-scale response to imposed climate change.
Rights: © 2000 International Glaciological Society
Type: article
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: Greve Ralf

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