青藏高原积雪对中国夏季风气候的影响

利用SVD等方法对青藏高原积雪与中国区域降水的关系作了诊断分析。并用区域气候模式（RegCM2）对高原积雪的气候效应进行了模拟。结果表明:青藏高原积雪对中国夏季风气候的影响是显著的。积雪的增加会明显减弱亚洲夏季风的强度，使华南的降水减少，江淮流域的降水增多。高原冬季积雪深度的增加，比积雪面积的扩大和春季积雪深度的增加对后期气候的影响更大。

Effect of the Tibetan Plateau Snow Cover on China Summer Monsoon Climate

A diagnosis of correlation between the Tibetan Plateau snow cover and China regional precipitation has been made by using singular value decomposition (SVD) methods. And a simulation of climate effects of the Tibetan Plateau snow cover has been made by RegCM2. Results show that: the Tibetan Plateau snow cover has significant effects on China summer monsoon climate. Increasing snow cover will obviously decrease the strength of Asia summer monsoon and the precipitation of South China and increase the precipitation of the Changjiang River valley. The increase of the Tibetan Plateau winter snow depth has more remarkable influence on later climate than that of the area of snow cover and spring snow depth.