青藏高原现代降水中dδ^（18）O／dT的变化

Variation of dδ￣(18)O / dT in Precipitation in the Tibetan Plateau

不同时间尺度ｄδ^（１８）Ｏ／ｄＴ的天气气候意义是不同的，其数值大小也是不一样的。本文根据对青藏高原沱沱河、德令哈、西宁三站大气降水中δ^（１８）Ｏ与温度关系的分析，并与具有长序列资料的地区进行比较，初步给出了青藏高原不同时间尺度ｄδ^（１８）Ｏ／ｄＴ之间的差异。

This paper analyses the relations between 618O and temperature, as well as the synoptic,seasonal and climatic variations of δ￣(18)O with temperature, according to the data from Tuotuohe (34°13′ N, 96°26′ E; 4533 m a.s.l.), Delingha (37°22′ N, 97°22′ E; 2981 m a.s.l.) and Xining (36°37′N, 101°46′E; 226lm a.s.l.). The results show that the significance of dδ￣(18)O / dT of different time scales is different. Averagely, the long the time scale is,the greater the dδ￣(18)O / dT value is.