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| Titel |
Response of an ocean-atmosphere climate model to Milankovic forcing |
| VerfasserIn |
E. S. Posmentier |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 1, no. 1 ; Nr. 1, no. 1, S.26-30 |
| Datensatznummer |
250000053
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| Publikation (Nr.) |
 copernicus.org/npg-1-26-1994.pdf |
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| Zusammenfassung |
| There is considerable evidence in support of Milankovic's
theory that variations in high-latitude summer insolation caused by Earth orbital
variations are the cause of the Pleistocene ice cycles. The enigmatic discrepancy between
the spectra of Milankovic forcing and of Pleistocene climate variations is believed to be
resolved by the slow, nonlinear response of ice sheets to changes in solar seasonality. An
experiment with a preliminary version of a 14-region atmosphere/snow/upper ocean climate
model demonstrates that the response of the ocean-atmosphere system alone to Milankovic
forcing is capable of driving ice cycles with the observed spectrum. This occurs because
of the highly nonlinear response of both the thermal seasons and the annual mean
temperature to solar seasons, which is caused in turn by the highly nonlinear feedback
between temperature and snow and sea ice. |
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