EFFECT OF ZONAL DIFFERENCE OF SEA SURFACE TEMPERATURE ANOMALIES IN THE ARABIAN SEA AND THE SOUTH CHINA SEA ON SUMMER RAINFALL OVER THE YANGTZE RIVER
Chen Lieting(Institute of Atmospheric Physics, Chinese Academy of Sciences)
In this paper, the difference of tropical circulations is analyzed for the two different types of zonal distributions of sea surface temperature (SST) anomaly in the Arabian Sea and the South China Sea. The physical processes for the effect of zonal difference of SST anomalies in that oceanic area on the summer rainfall over the lower and middle reaches of Yangtze River are discussed. It is suggested that different types of zonal SST anomaly distributions may result in different variations in position and intensity of main components of the Indian and the east Asian monsoon systems, and lead to different distributions of the ITCZ and subtropical high over the western North Pacific, the summer rainfall in East China, through the interaction and adjustment between the two monsoon systems.