Dynamic and Thermodynamic Influences of the Tibetan Plateau on the Atmosphere in a General Circulation Model

摘要

The dynamic and thermodynamic influences of the Tibetan Plateau on the temperature, geopotential height, horizontal wind, vertical velocity, cloud and precipitation patterns over eastern Asia are physically investigated employing a general circulation model specifically designed for medium range weather prediction. The model is a modification and improvement of the one recently presented by Liou and Zheng. Efficient and accurate numerical techniques have been devised for the computation of the pressure gradient force and the initial field in the vicinity of mountains in the alpha-coordinate. In addition, a cumulus convection scheme and a liquid water content prediction equation from which the large-scale precipitation may be evaluated have been developed.