Numerical simulation research on the application of variational reanalysis technique with satellite remote sensing data over the Tibetan Plateau key area to '7.21'severe rainfall in Beijing

摘要

1.Introduction The Tibetan Plateau,which is the world's highest plateau with the most complex terrain,impacts profoundly the structural pattem of the global atmospheric circulation via its topographic and thermal effects,and thereby is a sensitive region of global weather-climate changes as well as one of important driving forces for the seasonal progression of monsoon over China and East Asia(Huang,1985;Qianet al.,1992;Wu and Zhang,1998,1999;Yasunari et al.,2000;He et al.,2007,2008).It impacts the moisture transport to torrential rains,floods,and disastrous snows areas in China(Chen el al.,1985;Ji et al.,1986;Yanaiet al.,1992;Zhao et al.,2001;Xu et al.,2002).