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《Chinese Journal of Atmospheric Sciences》 2001-06
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How the Surface Processes over the Tibetan Plateau Affect the Summertime Tibetan Anticyclone -Numerical Experiments

Li Weiping, Wu Guoxiong, Liu Yimin, ahd Liu Xin (State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijng l00029)  
Numerical simulations by using IAP/ LASG GOALS climate model are carried out to in- vestigate how the surface sensible heat flux and surface friction force over the Tibetan Plateau affect the summertime South Asia high. It is shown that the surface sensible heat flux enhances both the lower-level convergence in the Plateau area and the upper-level divergence outward, intensifies the ris- ing motion over the Plateau, thus strengthens the South Asia high. The surface friction force exerts ab- normal an anticyclonic circulation to the whole air column over the Plateau, hence causes the intensifi- cation of the South Asia high in summer. The influence of surface friction on atmospheric circulation decreases with height, whereas the impact of surface sensible heat flux on the circulation at higher level is comparable to that at the lower level.
【Fund】: 国家自然科学基金资助项目49805003、49635170、49905002;; 国家重点基础研究发展规划项目G19980409
【CateGory Index】: P461.2
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