Advances in Atmospheric Sciences

, Volume 25, Issue 4, pp 518–528 | Cite as

Influence of the Tibetan Plateau on the summer climate patterns over Asia in the IAP/LASG SAMIL model

  • Anmin Duan (段安民)
  • Guoxiong Wu (吴国雄)Email author
  • Xiaoyun Liang (梁潇云)


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 large-scale 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 mid-and upper layers, whereas the direct effect of the latter is much more significant. Following a requirement of the time-mean quasi-geostrophic vorticity equation for large-scale 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 Mid-Asia.

Key words

Tibetan Plateau thermal forcing climate pattern numerical simulation 


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Copyright information

© Chinese National Committee for International Association of Meteorology and Atmospheric Sciences, Institute of Atmospheric Physics, Science Press and Springer-Verlag GmbH 2008

Authors and Affiliations

  • Anmin Duan (段安民)
    • 1
  • Guoxiong Wu (吴国雄)
    • 1
    Email author
  • Xiaoyun Liang (梁潇云)
    • 2
  1. 1.State Key Laboratory of Numerical Modeling Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina
  2. 2.National Climate CenterBeijingChina

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