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| Titel |
Polynyas in a dynamic-thermodynamic sea-ice model |
| VerfasserIn |
E. Ö. Ólason, I. Harms |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1994-0416
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| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 4, no. 2 ; Nr. 4, no. 2 (2010-04-28), S.147-160 |
| Datensatznummer |
250001644
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| Publikation (Nr.) |
 copernicus.org/tc-4-147-2010.pdf |
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| Zusammenfassung |
| The representation of polynyas in viscous-plastic dynamic-thermodynamic sea-ice models is studied
in a simplified test domain, in order to give recommendations about parametrisation choices.
Bjornsson et al. (2001) validated their dynamic-thermodynamic model against a polynya
flux model in a similar setup and we expand on that work here, testing more sea-ice rheologies and
new-ice thickness formulations. The two additional rheologies tested give nearly identical results
whereas the two new-ice thickness parametrisations tested give widely different results. Based on
our results we argue for using the new-ice thickness parametrisation of Hibler (1979). We also
implement a new parametrisation for the parameter h0 from Hibler's scheme, based on ideas from a
collection depth parametrisation for flux polynya models. |
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