欧亚和青藏高原冬春季积雪与我国夏季降水关系的分析和预测应用

通过高原积雪和欧亚积雪与我国夏季降水的相关分析和统计检验，表明冬春季雪盖对我国夏季旱涝有重要的影响，虽然冬季和春季雪盖与我国夏季降水的相关分布存在差异，总趋势大致相仿。但是，冬春季高原积雪和欧 亚积雪与我国夏季降水的相关分布基本是相反的，其中高原积雪与长江中下游和西北东部地区夏季降水为正相关，欧亚积雪与东北和华北东部以及西南地区降水为正相关冬季节积雪异常偏多时，长江流域夏季易发生洪涝，这也是汛期降

ANALYSIS OF RELATIONSHIP BETWEEN SNOW COVER ON EURASIA AND QINGHAI-XIZANG PLATEAU IN WINTER AND SUMMER RAINFALL IN CHINA AND APPLICATION TO PREDICTION

The relationships between the snow cover in Eurasia and the Qinghai Xizang plateau (QXP) in pre winter and the summer rainfall in China were studied and tested. The result shows that there is the impotant effect of the snow cover on the summer rainfall in China. The relationship in winter and spring snow cover with the summer rainfall are about the same. But the relationship distributions between the snow cover in Eurasia and QXP and the summer rainfall in China are nearly contrary. The main positive correlation for snow cover in QXP occurs in the mid lower reaches of the Yangtze River and North East China and the east region of North China and South West China. The flood of the Yangtze River valley in summer usually is occured when anomalous snow cover in QXP would be above normal in winter. This is the important indicator for the prediction of rainfall in summer.