The altitude effect of δ 18O in precipitation and river water in the Southern Himalayas

被引:57
作者
Wen Rong [1 ,2 ]
Tian LiDe [1 ,3 ]
Weng YongBiao [1 ,2 ]
Liu ZhongFang [4 ]
Zhao ZhongPing [1 ]
机构
[1] Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100085, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
[3] Chinese Acad Sci, State Key Lab Cryosphere Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
[4] Tianjin Normal Univ, Tianjin Key Lab Water Environm & Water Resource, Tianjin 300387, Peoples R China
来源
CHINESE SCIENCE BULLETIN | 2012年 / 57卷 / 14期
基金
中国国家自然科学基金;
关键词
delta O-18; precipitation; river water; isotopic lapse rate; southern Himalayas; ISOTOPE-BASED PALEOALTIMETRY; STABLE-ISOTOPE; TIBETAN PLATEAU; ICE-CORE; OXYGEN-ISOTOPE; ASIAN MONSOON; PALEOELEVATION; ELEVATION; RECORDS; NEPAL;
D O I
10.1007/s11434-012-4992-7
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The lapse rate of water isotopes is used in the study of the hydrologic cycle as well as in the estimation of uplift of the Tibetan Plateau. The greater elevation contrast in the Southern Himalayas allows for a detailed discussion about this lapse rate. We analyze variations of delta O-18 in precipitation and river water between 1320 m and 6700 m elevations in the Southern Himalayas, and calculate the specific lapse rate of water delta O-18. The results show that the multi-year average lapse rate in precipitation over this region is 0.15aEuro degrees/100 m. The one-year average lapse rate is 0.17aEuro degrees/100 m from three sites along the Southern Himalayas. The two results agree, but are much lower than the global average of 0.28aEuro degrees/100 m. This work also shows that there is a difference in precipitation delta O-18 lapse rate between the monsoon and non-monsoon seasons. The calculated precipitation lapse rate is much lower than that in surface water.
引用
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页码:1693 / 1698
页数:6
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