全球温度变化对我国降水的影响

该文计算了１９５１－１９９１年我国１６０个站年降水量与全球气温的交叉谱。得到在１０－３０年周期上我国降水量与全球温度变化的正、负相关区可分为界线分明的几个区，其中最明显的分界线位于我国半干旱区的中轴附近。在此线以北和以西的西北、内蒙和东北北部，降水量与全球温度呈同步演变趋势；在此线以南和以东的大部分地区，降水量与全球温度变化趋势相反。上述分界线恰好是我国盛夏夏季风的平均北界，表明我国降水分布对全球温度变化的响应与东亚夏季风的强弱变化有关。 

The Influence of Fluctuation of Global Temperature on Precipitation in China

The cross spectrum of precipitation in 160 stations of China and global temperatureduring 1951-1991 are calculated in the paper. It is found that there exists boundarylines which divide it into several areas , which is marked with positive or negativecorrelations between precipitation and globai temperature. Among these lines, the mostremarkable one locates exactly near the central axis of semi-arid region of China. Northand west of the line: Northwest China, inner Mongolian and north part of Northeastchina, the fluctuation of precipitation is synchronous with global temperature. Southand east of the line,there exists negative correlation between precipitation and globaltemperature. The above demarcation line is just the mean northern boundary of summermonscon in mid-summer in China. It indicates that the response of precipitationdistribution in China to global temperat ure has relevance to intensity fluctuation ofsummer monsoon in Eas t Asia.