青藏高原地表感热与华北夏季降水的相关分析

A Study on the correlation between Tibetan plateau surface sensible heating and the precipitation over north China during rainy season

利用1956—2002年青藏高原地表感热状况,1957—2002年我国华北地区104站月降水资料,分析了青藏高原地表感热与华北夏季(7、8月)降水的可能联系。结果表明,青藏高原4月感热与华北地区夏季降水具有较显著的负相关,高关键区位于高原的北部。于是,进一步计算了高原关键区与华北各地区夏季降水的相关系数,影响最显著的地区主要位于内蒙古的东南部以及山东南部。最后通过计算得出华北南部与青藏高原北部地区有较好的相关性。

The possible connections are statistically analyzed between the surface sensible heating of Tibetan Plateau and the precipitation over North China and its subregions during rainy season （in July and August） using the datasets of monthly sensible heating for 1956-2002 and 104 stations rainfall over North China for 1957-2002. The result shows that the relations exist between sensible heating during April and the precipitations over North China during rainy season with the high values situated at north areas of Tibetan Plateau. Furthermore, we calculate the correlation between the key area of Tibetan Plateau sensible heating and the precipitation over North China and find the striking correlation between the north area of Tibetan Plateau and the south area of North China.