Impact of the Sea Surface Temperature on Regional Flood and Its Dynamic Analyses

In this paper, the distribution characteristics of the Sea Surface Temperature (SST) are analyzed for the Pacific area in Winter and Spring, which are in earlier stage of Summer drought/flood in the middle and lower reaches of Changjiang River. In order to find the causes of regional drought/flood, the circulation characteristics in Northern Hemisphere concerning the thermal anomaly of SST is discussed. As a result, we have found that the SST anomaly in East Equatorial Pacific can stimulate low-frequency teleconnection wave train similar to great circle route, which may be one of the dynamic mechanisms for regional drought/flood. The statistic results are also proved through the numerical simulation experiments.