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| Titel |
The Eurasian ice sheet reinforces the East Asian summer monsoon during the interglacial 500 000 years ago |
| VerfasserIn |
Qiuzhen Yin, A. Berger, E. Driesschaert, H. Goosse, M. F. Loutre, M. Crucifix |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 4, no. 2 ; Nr. 4, no. 2 (2008-05-23), S.79-90 |
| Datensatznummer |
250001623
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| Publikation (Nr.) |
 copernicus.org/cp-4-79-2008.pdf |
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| Zusammenfassung |
| Deep-sea and ice-core records show that interglacial periods were overall
less "warm" before about 420 000 years ago than after, with relatively
higher ice volume and lower greenhouse gases concentration. This is
particularly the case for the interglacial Marine Isotope Stage 13 which
occurred about 500 000 years ago. However, by contrast, the loess and other
proxy records from China suggest an exceptionally active East Asian summer
monsoon during this interglacial. A three-dimension Earth system Model of
Intermediate complexity was used to understand this seeming paradox. The
astronomical forcing and the remnant ice sheets present in Eurasia and North
America were taken into account in a series of sensitivity experiments.
Expectedly, the seasonal contrast is larger and the East Asian summer
monsoon is reinforced compared to Pre-Industrial time when Northern Hemisphere summer is at perihelion. Surprisingly, the presence of the
Eurasian ice sheet was found to reinforce monsoon, too, through a
south-eastwards perturbation planetary wave. The trajectory of this wave is
influenced by the Tibetan plateau. |
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