Benchmarking the vertically integrated ice-sheet model IMAU-ICE (version 2.0)

Berends, C. J. and Goelzer, H. and Reerink, T. J. and Stap, L. B. and van de Wal, R. S. W.

Ice-dynamical processes constitute a large uncertainty in future projections of sea-level rise caused by anthropogenic climate change. Improving our understanding of these processes requires ice-sheet models that perform well at simulating both past and future ice-sheet evolution. Here, we present version 2.0 of the ice-sheet model IMAU-ICE, which uses the depth-integrated viscosity approximation (DIVA) to solve the stress balance. We evaluate its performance in a range of benchmark experiments, including simple analytical solutions and both schematic and realistic model intercomparison exercises. IMAU-ICE has adopted recent developments in the numerical treatment of englacial stress and sub-shelf melt near the grounding line, which result in good performance in experiments concerning grounding-line migration (MISMIP, MISMIP+) and buttressing (ABUMIP). This makes it a model that is robust, versatile, and user-friendly, which will provide a firm basis for (palaeo-)glaciological research in the coming years.

Bibliographic data

Berends, C. J. and Goelzer, H. and Reerink, T. J. and Stap, L. B. and van de Wal, R. S. W.. Benchmarking the vertically integrated ice-sheet model IMAU-ICE (version 2.0)
Journal: Geoscientific Model Development, Volume: 15, Year: 2022, First page: 5667, Last page: 5688, doi: https://doi.org/10.5194/gmd-15-5667-2022