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| Titel |
An important mechanism sustaining the atmospheric "water tower" over the Tibetan Plateau |
| VerfasserIn |
X. Xu, T. Zhao, C. Lu, Y. Guo, B. Chen, R. Liu, Y. Li, X. Shi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 20 ; Nr. 14, no. 20 (2014-10-27), S.11287-11295 |
| Datensatznummer |
250119121
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| Publikation (Nr.) |
 copernicus.org/acp-14-11287-2014.pdf |
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| Zusammenfassung |
| The Tibetan Plateau (TP), referred to as the "roof of the world", is also
known as the "world water tower" because it contains a large amount of
water resources and ceaselessly transports these waters to its surrounding
areas. However, it is not clear how these waters are being supplied and
replenished. In particular, how plausible hydrological cycles can be
realized between tropical oceans and the TP. In order to explore the
mechanism sustaining the atmospheric "water tower" over the TP, the
relationship of a "heat source column" over the plateau and moist flows in
the Asian summer monsoon circulation is investigated. Here we show that the
plateau's thermal structure leads to dynamic processes with an integration
of two couplings of lower convergence zones and upper divergences, respectively,
over the plateau's southern slopes and main platform, which relay moist air
in two ladders up to the plateau. Similarly to the CISK (conditional
instability of the second kind) mechanism of tropical cyclones, the elevated
warm–moist air, in turn, forces convective weather systems, hence building a
water cycle over the plateau. An integration of mechanical and thermal
TP forcing is revealed in relation to the Asian summer monsoon circulation
knitting a close tie of vapor transport from tropical oceans to the
atmospheric "water tower" over the TP. |
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