李晖,周宏飞

• 1:中国科学院新疆生态与地理研究所
• 2:中国科学院新疆生态与地理研究所 乌鲁木齐830011
• 3:中国科学院阜康荒漠生态研究站
• 4:阜康831505

摘要(Abstract)：

本文研究了乌鲁木齐地区近17年(1986—2002)大气降水的氢氧同位素组成,提出了大气降水线方程为δD=7.21δ18O+4.50,并与全国及全球降水线方程进行对比,揭示了该降水线方程的特征。研究表明,乌鲁木齐水分来源复杂,主要是西风带输送的海洋水汽和局地的蒸发,大气降水的加权平均18O与月平均气温相关关系显著,与雨量效应(降水量效应)较相关,降水中温度效应明显,且在一定时期很大程度上其影响掩盖了雨量效应。乌鲁木齐降水中δ18O的季节变化与温度的季节变化几乎一致,温度是制约降水中稳定同位素变化的主要影响因子。

关键词(KeyWords)： 大气降水;δD;δ18O;温度效应;雨量效应;氘盈余;乌鲁木齐

Abstract:

Keywords:

基金项目(Foundation): 中国科学院野外站基金项目(20053025);; 国家自然科学基金项目(40471048)资助

作者(Author): 李晖,周宏飞

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