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A subglacial water-flow model for West Antarctica.

Le Brocq, A.M. and Payne, A.J. and Siegert, M.J. and Alley, R.A. (2009) 'A subglacial water-flow model for West Antarctica.', Journal of glaciology., 55 (193). pp. 879-888.

Abstract

The current generation of continental-scale ice-sheet models cannot successfully reproduce the complex ice/water/sediment interactions of the West Antarctic ice sheet (WAIS) in a physically meaningful manner. The potential of a thin-film-based subglacial water-flow model for incorporation into a continental-scale coupled ice/water flow model of the WAIS is evaluated in this paper. The subglacial water-flow model is applied to the Ross Sea sector of the WAIS, in both a steady-state and time-dependent form, to derive the equilibrium water depth for the present-day configuration. The potential for coupling the model to an ice-flow model is then demonstrated, using a variable sliding parameter that is a function of the subglacial water depth. A coupled ice/water flow model, using the parameterization tested in this paper, could have the potential for reproducing the surface elevation, velocity and thermal regime of the WAIS successfully. These requirements are crucial in modelling the evolution of the WAIS, and must be addressed before reliable continental-scale predictive models can be utilized.

Item Type:Article
Full text:PDF - Published Version (1111Kb)
Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.3189/002214309790152564
Publisher statement:© 2009 International Glaciological Society
Record Created:13 May 2010 13:50
Last Modified:18 Nov 2010 15:27

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