中国及邻近地区冬到夏的季节变化

Seasonal Change from Winter to Summer for Circulation and Rainfall in China and Contiguous Regions

南亚地区在冬到夏的转变过程中有显著的热力学与环流变化特征，是北半球季节变化的敏感区，对我国长期变化有十分重要的意义。根据这一特点，设计计算了南支西风指数，并将副高面积指数分南北两区统计，更好地反映了季节变化特征。统计结果表明，这个指数组对梅雨与华北雨季有天气气候学意义。同时还找到了这个指数组对我国一些地区旱涝的前期指标。

he annual variation of thermal and circulational peculiarities are analyzed, while the article high lighted that South Asia is a sensitive region in seasonal change. For better representation of seasonal change, an index of south branch of westerlies, as well as a new area index of subtropical high for north and south regions were proposed abed calculated. Statistical results show that there is prominent significance of these index with Meiyu and rainy season of North China. A series of index earlier to serious drought and flood were also sought out for reference to long range weather forecast.