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| Titel |
Modeling sensitivity study of the possible impact of snow and glaciers developing over Tibetan Plateau on Holocene African-Asian summer monsoon climate |
| VerfasserIn |
L. Jin, Y. Peng, F. Chen, A. Ganopolski |
| 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 ; 5, no. 3 ; Nr. 5, no. 3 (2009-08-21), S.457-469 |
| Datensatznummer |
250002545
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| Publikation (Nr.) |
 copernicus.org/cp-5-457-2009.pdf |
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| Zusammenfassung |
| The impacts of various scenarios of a gradual snow and glaciers developing
over the Tibetan Plateau on climate change in Afro-Asian monsoon region and
other regions during the Holocene (9 kyr BP–0 kyr BP) are studied by using
the Earth system model of intermediate complexity, CLIMBER-2. The
simulations show that the imposed snow and glaciers over the Tibetan Plateau
in the mid-Holocene induce global summer temperature decreases over most of
Eurasia but in the Southern Asia temperature response is opposite. With the
imposed snow and glaciers, summer precipitation decreases strongly in North
Africa and South Asia as well as northeastern China, while it increases in
Southeast Asia and the Mediterranean. For the whole period of Holocene (9 kyr BP–0 kyr BP), the response of vegetation cover to the imposed snow and
glaciers cover over the Tibetan Plateau is not synchronous in South Asia and
in North Africa, showing an earlier and a more rapid decrease in vegetation
cover in North Africa from 9 kyr BP to 6 kyr BP while it has only minor
influence on that in South Asia until 5 kyr BP. The precipitation decreases
rapidly in North Africa and South Asia while it decreases slowly or
unchanged during 6 kyr BP to 0 kyr BP with imposed snow and glacier cover
over the Tibetan Plateau. The different scenarios of snow and glacier
developing over the Tibetan Plateau would result in differences in variation
of temperature, precipitation and vegetation cover in North Africa, South
Asia and Southeast Asia. The model results suggest that the development of
snow and ice cover over Tibetan Plateau represents an additional important
climate feedback, which amplify orbital forcing and produces a significant
synergy with the positive vegetation feedback. |
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