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| Titel |
Limitations of a coupled regional climate model in the reproduction of the observed Arctic sea-ice retreat |
| VerfasserIn |
W. Dorn, K. Dethloff, A. Rinke |
| 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 ; 6, no. 5 ; Nr. 6, no. 5 (2012-09-14), S.985-998 |
| Datensatznummer |
250003782
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| Publikation (Nr.) |
 copernicus.org/tc-6-985-2012.pdf |
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| Zusammenfassung |
| The effects of internal model variability on the simulation of
Arctic sea-ice extent and volume have been examined with the aid of
a seven-member ensemble with a coupled regional climate model for
the period 1948–2008. Beyond general weaknesses related to
insufficient representation of feedback processes, it is found that
the model's ability to reproduce observed summer sea-ice retreat
depends mainly on two factors: the correct simulation of the
atmospheric circulation during the summer months and the sea-ice
volume at the beginning of the melting period. Since internal model
variability shows its maximum during the summer months, the ability
to reproduce the observed atmospheric summer circulation is limited.
In addition, the atmospheric circulation during summer also
significantly affects the sea-ice volume over the years leading to
a limited ability to start with reasonable sea-ice volume into the
melting period. Furthermore, the sea-ice volume pathway shows
notable decadal variability that varies in amplitude among the
ensemble members. The scatter is particularly large in periods when
the ice volume increases, indicating limited skill in reproducing
high-ice years. |
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