若羌地区降水量变动的特征  

SOME CHARACTERISTICS OF PRECIPITATION CHANGE IN RUOQIANG

作　　者：尹思明[1] 林振耀[1] 

机构地区：[1]中国科学院地理研究所

出　　处：《干旱区地理》1992年第3期65-70,共6页Arid Land Geography

摘　　要：采用若羌36年(1953——1988年)的降水资料讨论了该地区降水特征,通过分析得到:1.若羌降水量的均值、方差、相关系数和降水变率等气候统计量的特征;2.若羌降水量有增多的趋势。本世纪50年代年降水16.2mm,60年代18.0mm,70年代20.3mm,而80年代达们40.2mm,为50年代的2.5倍;3.1981及1988年7月份大暴雨,说明干旱区降水量年际变化大,并从中得到有关水汽来源及其水汽输送路径的认识。Some preliminary conclusions have been obtained as following based on the analyses of the precipitation data from 1953 to1988 in Ruoqiang:1. There is a track of moisture transportation from the Bay of Bengal, along the Brahmaputra River, to the nothward, the northern region of the Qingtai—Xizang Plateau. It is possible that the water vapour from the Indian Ocean goes along this way and arrives at Ruoqiang region.2. The precipitation has had a increasing tendency in Ruoqiang since 1950s. The annual precipitation was 16.2 mm in the 1950s, 18.0 mm in the 1960s,20. 3 mm in the 1970s,40.2 mm in the 1980s respectively.3. The annual precipitation is 23.8 mm in Ruoqiang. The rainfall of unusual rainstorms occurred in July of 1981 and 1988 were 73.5 and 48.2 mm respectively. These two rainstorms made a great variety of annual precipitation in Ruoqiang.

关 键 词：降水量 变动 水汽输送 若羌地区 

分 类 号：P426.613[天文地球—大气科学及气象学]