影响青藏高原的天气系统与降水中氧同位素的关系

Relations between Weather Systems Affecting Tibetan Plateau and Oxygen Isotope in Precipitation

青藏高原的天气系统对降水中氧同位素比率的大小有重要影响。在西风槽的影响下，降水中δ（１８）Ｏ与温度呈正相关关系；在切变线和高原低涡系统的影响下，高原季风区降水中δ（１８）Ｏ与降水量和温度呈负相关。非季风区降水中δ（１８）Ｏ与温度仍呈正相关。

Weather systems have significant effect on δ￣(18)O in precipitation on Tibetan Plateau.Generally, under the influence of westerly trough, the change of δ￣(18)O in the Plateau is sychronous with that of temperature. Under the influence of shearing line and plateau low-eddy, the change features of δ￣(18)O in the monsoon regions of the Plateau are similar to that in coast stations or island stations in the low latitudes where there is marked negative correlated relation between δ￣(18)O and precipitation or temperature, while the variation characteristics of δ￣(18)O in the non-monsoon regions of the Plateau are alike with those in the continental stations in the mid-high latitudes where remarkable positive correlated relation between δ￣(18)O and temperature is found.