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

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.

Details

Publication status:
Published
Author(s):
Authors: Durand, Gaël, Gagliardini, Olivier, Zwinger, Thomas, Le Meur, Emmanuel, Hindmarsh, Richard C.A.

On this site: Richard Hindmarsh, Richard Hindmarsh
Date:
1 January, 2009
Journal/Source:
Annals of Glaciology / 50
Page(s):
109-114
Digital Object Identifier (DOI):
https://doi.org/10.3189/172756409789624283