喜马拉雅山南坡降水与河水中δ18O高程效应

被引：8

作者：

文蓉 ^{[1
,2
]}

田立德 ^{[1
,3
]}

翁永标 ^{[1
,2
]}

刘忠方 ^{[4
]}

赵中平 ^{[1
]}

机构：

[1] 中国科学院青藏高原研究所,青藏高原环境变化与地表过程重点实验室

[2] 中国科学院研究生院

[3] 中国科学院寒区旱区环境与工程研究所,冰冻圈科学国家重点实验室

[4] 天津师范大学天津市水环境与水资源重点实验室

来源：

科学通报 | 2012年 / 57卷 / 12期

关键词：

δ18O; 降水; 河水; 垂直递减率; 喜马拉雅山南坡;

D O I：

暂无

中图分类号：

P339 [水文循环与水文气象];

学科分类号：

摘要：

水体中稳定同位素的垂直递减率不仅是反映稳定同位素水文循环过程的指标,也是重建青藏高原古海拔高度的重要变量.喜马拉雅山南坡垂直落差大,是直接监测研究降水与河水同位素垂直递减率的理想地区.本研究根据喜马拉雅山南坡沿垂直梯度从1320m到6700m的降水、雪冰以及河水的δ18O变化,计算了该地区降水及河水δ18O的垂直递减率.结果表明,喜马拉雅山南坡多年平均降水中δ18O的垂直递减率为0.15‰/100m,3个站点计算的δ18O在年尺度上的垂直递减率为0.17‰/100m.两个结果十分接近,但都远低于全球0.28‰/100m.而且还发现非季风期降水的垂直递减率高于季风期,而河水中δ18O的垂直递减率普遍高于降水.

引用

页码：1053 / 1059

页数：7

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