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Influence of atmospheric heat sources over the Tibetan Plateau and the tropical western North Pacific on the inter-decadal variations of the stratosphere-troposphere exchange of water vapor

Generalized effective medium resistivity model for low resistivity reservoir

Science in China Series D: Earth Sciences : Volume 51, Issue 7, July 2008

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Influence of atmospheric heat sources over the Tibetan Plateau and the tropical western North Pacific on the inter-decadal variations of the stratosphere-troposphere exchange of water vapor

Content Provider	Springer Nature Link
Author	Zhan, RuiFen Li, JianPing
Copyright Year	2008
Abstract	This study investigates the Stratosphere-Troposphere Exchange (STE) of water vapor, emphasizes its inter-decadal variations over Asia in boreal summer, and discusses the influences of atmospheric heat sources over the Tibetan Plateau and the tropical western North Pacific (WNP) on them by using the Wei method with reanalysis data from the European Centre for Medium-Range Weather Forecasts (ECMWF) for the years of 1958–2001. The climatology shows that the upward transport of water vapor across the tropopause in boreal summer is the most robust over the joining area of the South Asian Peninsula and Indian-Pacific Oceans (defined as AIPO). The upward transport over there can persistently convey the abundant water vapor into the stratosphere and then influence the distribution and variation of the stratospheric water vapor. The analysis shows that inter-decadal variations of the water vapor exchange over the AIPO are significant, and its abrupt change occurred in the mid-1970s and the early 1990s. In these three periods, as important channels of the water vapor exchange, the effect of Bay of Bengal-East Asia as well as South China Sea was gradually weakening, while the role of the WNP becomes more and more important. Further studies show that atmospheric heat sources over the Tibetan Plateau and the WNP are two main factors in determining the inter-decadal variations of water vapor exchange. The thermal influences over the Tibetan Plateau and the WNP have been greatly adjusted over the pass 44 years. Their synthesis influences the inter-decadal variations of the water vapor exchange by changing the Asian summer monsoon, but their roles vary with time and regions. Especially after 1992, the influence of heat source over the Tibetan Plateau remarkably weakens, while the heat source over the WNP dominates the across-tropopause water vapor exchange. Results have important implications for understanding the transport of other components in the atmosphere and estimating the impact of human activities (emission) on global climate.
Starting Page	1179
Ending Page	1193
Page Count	15
File Format	PDF
ISSN	10069313
Journal	Science in China Series D: Earth Sciences
Volume Number	51
Issue Number	8
e-ISSN	18622801
Language	English
Publisher	SP Science in China Press
Publisher Date	2008-07-16
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	Tibetan Plateau tropical western North Pacific atmospheric heat source STE inter-decadal variations Geosciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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