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Full Stokes modeling of marine ice sheets: influence of the grid size

Durand, Gaël; Gagliardini, Olivier; Zwinger, Thomas; Le Meur, Emmanuel; Hindmarsh, Richard C.A.. 2009 Full Stokes modeling of marine ice sheets: influence of the grid size. Annals of Glaciology, 50 (52). 109-114. 10.3189/172756409789624283

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Abstract/Summary

Using the finite-element code Elmer, we show that the full Stokes modeling of the ice-sheet/ice-shelf transition we propose can give consistent predictions of grounding-line migration. Like other marine ice-sheet models our approach is highly sensitive to the chosen mesh resolution. However, with a grid size down to <5 km in the vicinity of the grounding line, predictions start to be robust because: (1) whatever the grid size (<5 km) the steady-state grounding-line position is sensibly the same (6 km standard deviation), and (2) with a grid-size refinement in the vicinity of the grounding line (200 m), the steady-state solution is independent of the applied perturbation in fluidity, provided this perturbation remains monotonic.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.3189/172756409789624283
Programmes: BAS Programmes > Polar Science for Planet Earth (2009 - ) > Ice Sheets
ISSN: 0260-3055
NORA Subject Terms: Glaciology
Date made live: 25 Oct 2010 13:47
URI: http://nora.nerc.ac.uk/id/eprint/10736

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