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| Titel |
MISMIP: Marine Ice Sheet Model Intercomparison Project Results |
| VerfasserIn |
C. Schoof, R. C. A. Hindmarsh, F. Pattyn |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250021869
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| Zusammenfassung |
| Resolving the dynamics of marine ice sheets numerically has posed considerable problems in
the past. Using recently derived semi-analytical steady-state results as a benchmark, we
compare results for a set of standardized experiments computed using a number of different
models and discretization techniques. In particular, we compare the performance of models
under advance and retreat scenarios, and whether they capture certain ‘tipping points’ — or
bifurcations — predicted by the benchmark results. We find that high grid resolution
near the grounding line is essential, but even given that caveat, model behaviour
can depend significantly on the details of discretization, in particular on how the
flotation criterion for transition from grounded ice, which experiences basal friction,
to floating ice, which does not, is handled by a particular model code. We also
discuss possible choice of models for large-scale simulation of marine ice sheets. |
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