东亚西风急流变化与热带对流加热关系的研究

应用OLR资料和高空格点资料，研究了东亚地区西风急流及其附近的纬向西风与热带地区对流加热场的关系。结果表明西风急流中心的季节变化是和热带加热场的季节变化紧密的联系在一起的。东亚地区的纬向西风强度的年变化与热带加热场的同期及前期状况也密切相关，这种关系可以作为预测我国江淮地区夏季梅雨的一个强信号。

A Study on the Variations of the Westerly Jet over East Asia and Its Relation with the Tropical Convective Heating

The annual cycle and interannual variation of the the westerly jet over East Asia and its relation with the tropical convective heating is studied by using the OLR data and gridded up-air data It is found that the annual cycle of the jet core is closely linked with the tropical convective heating The interannual variation of the westerly jet and the intensity of the subtropical westerly wind is closely related with the tropical convective heating It is also found the intensity of the subtropical westerly wind over East Asia in summer is closely correlated with the tropical convective heating in the previous months This relation can be used as a signal to predict the summer monsoon rainfall in the areas between the Changjiang and the Huaihe River basin