The monthly mean geostrophic wind fields for January during 1951 - 1990 period are calculated by using data of500 hpa monthly mean height. The relation between Asia jetstream in winter and the important seasonal preci...The monthly mean geostrophic wind fields for January during 1951 - 1990 period are calculated by using data of500 hpa monthly mean height. The relation between Asia jetstream in winter and the important seasonal precipitationin East China is analysed. The analysis shows that the south branch of jetstream is stronger (weaker) in winter, therainfall will be more (less) than normal in the subsequent spring in South China, and summer rainfall in North Chinawill be more (less). too; these important rainy seasons are related to each other; the indian summer monsoon is notonly related to the summer rainfall in North China, but also related to the spring rainfall in South China and thesouth branch of jetstream in winter.展开更多
The analyses have been made of the summer precipitation data over Indian and North China during 1891—1983.The statistic results show that the climatic characteristics of the Indian summer monsoon rainfall are similar...The analyses have been made of the summer precipitation data over Indian and North China during 1891—1983.The statistic results show that the climatic characteristics of the Indian summer monsoon rainfall are similar to summer rainfall in North China,and a steady and significant positive correlation exists be- tween them. The circulation systems associated with the Indian monsoon and the rainfall in North China in summer have also been discussed.It is found that there are same predictors in April to be used for the forecast of North China rainfall and Indian monsoon.展开更多
文摘The monthly mean geostrophic wind fields for January during 1951 - 1990 period are calculated by using data of500 hpa monthly mean height. The relation between Asia jetstream in winter and the important seasonal precipitationin East China is analysed. The analysis shows that the south branch of jetstream is stronger (weaker) in winter, therainfall will be more (less) than normal in the subsequent spring in South China, and summer rainfall in North Chinawill be more (less). too; these important rainy seasons are related to each other; the indian summer monsoon is notonly related to the summer rainfall in North China, but also related to the spring rainfall in South China and thesouth branch of jetstream in winter.
文摘The analyses have been made of the summer precipitation data over Indian and North China during 1891—1983.The statistic results show that the climatic characteristics of the Indian summer monsoon rainfall are similar to summer rainfall in North China,and a steady and significant positive correlation exists be- tween them. The circulation systems associated with the Indian monsoon and the rainfall in North China in summer have also been discussed.It is found that there are same predictors in April to be used for the forecast of North China rainfall and Indian monsoon.
