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Title of Journal: Adv Atmos Sci

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Abbravation: Advances in Atmospheric Sciences

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SP Science Press

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DOI

10.1007/3-540-62868-1_175

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1861-9533

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Influence of the Tibetan Plateau on the summer cli

Authors: Anmin Duan Guoxiong Wu Xiaoyun Liang
Publish Date: 2008/07/18
Volume: 25, Issue: 4, Pages: 518-528
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Abstract

A series of numerical experiments are carried out by using the Spectral Atmospheric Model of State Key Laboratory of Numerical Modeling Atmospheric Sciences and Geophysical Fluid Dynamics/Institute of Atmospheric Physics SAMIL to investigate how the Tibetan Plateau TP mechanical and thermal forcing affect the circulation and climate patterns over subtropical Asia It is shown that compared to mechanical forcing the thermal forcing of TP plays a dominant role in determining the largescale circulation in summer Both the sensible heating and the latent heating over TP tend to generate a surface cyclonic circulation and a gigantic anticyclonic circulation in the midand upper layers whereas the direct effect of the latter is much more significant Following a requirement of the timemean quasigeostrophic vorticity equation for largescale air motion in the subtropics convergent flow and vigorous ascending motion must appear to the east of TP Hence the summer monsoon in East China is reinforced efficiently by TP In contrast the atmosphere to the west of TP is characterized by divergent flow and downward motion which induces the arid climate in MidAsia

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