How the Surface Processes over the Tibetan Plateau Affect the Summertime Tibetan Anticyclone -Numerical Experiments
青藏高原表面过程对夏季青藏高压的影响--数值试验

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.