THE SENSITIVITY EXPERIMENTS OF INFLUENCES OF UPLIFT OF TIBETAN PLATEAU ON CIRCULATION IN SUMMER

A coupled general circulatin model in a zonal belt is used to simulate the variation of circulation features in the process of uplift of Tibetan Plateau.The results reveal that the heating rates of the Plateau increase with the rising of the Plateau topography, and the latent heating component in the heating field tends to be the most important heating factor.The uplift of Plateau enhances the upward motion,intensifiec the pressure systerns in the high and low level atmosphere,reinforces Southeast Asia monsoon strenth,increases precipitation and severely decreases the surface temprature over the Tibetan Plateau. However,the basic structures of the general circulations do not vary much due to the uplift of the Tibdtan Plateau,and it is the land-sea distribution that is the decisive factor to form the present circulation pattern and monsoon. Therefore to simulate the palaeclimateduring the geological period peopole should consider more factors,especially the land-sea distribution.