The Cryosphere
The Cryosphere
TC
Articles | Volume 20, issue 4
Articles | Volume 20, issue 4
https://doi.org/10.5194/tc-20-1997-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-20-1997-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 20, issue 4
Research article
 | 
10 Apr 2026
Research article |  | 10 Apr 2026

Effects of subgrid-scale ice topography on the ice shelf basal melting simulated in NEMO-4.2.0

Dorothée Vallot, Nicolas C. Jourdain, and Pierre Mathiot

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Short summary
Some recent studies show that the topography at the base of an ice shelf has consequences for its interaction with the ocean. To describe friction velocity in the melt parameterisation, we use a drag coefficient dependent on the distance of the first wet cell to the ice and the basal topography rather than a fixed-tuned parameter. We find that it is less dependent on the choice of vertical resolution and, while providing similar total melt, it gives more weight to highly crevassed areas.
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