Influence of moisture transport on stable isotope
in precipitation in Yarlungzangbo River basin

doi:10.1007/s11707-008-0012-2

Front. Earth Sci.

0, Vol.

Issue () : 49-57 https://doi.org/10.1007/s11707-008-0012-2

Influence of moisture transport on stable isotope in precipitation in Yarlungzangbo River basin

LIU Zhongfang¹, TIAN Lide², YAO Tandong², GONG Tongliang³, YIN Changliang⁴

1.Institute of Tibetan Plateau Research, Chinese Academy of Sciences; 2.Institute of Tibetan Plateau Research, Chinese Academy of Sciences; Key Laboratory of Cryosphere and Environment, CAREERI, CAS; 3.Institute of Tibetan Water Resource Reconnaissance and Designing; 4.Key Laboratory of Cryosphere and Environment, CAREERI, CAS

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Abstract The relationship between the variation of ?¹⁸O in precipitation in Yarlungzangbo River basin and the moisture flux was analyzed with NCEP/NCAR reanalysis grid data and ?¹⁸O in precipitation at four stations (Lazi, Nugesha, Yangcun and Nuxia) of the region investigated. In terms of spatial variations, there is obviously a positive correlation between them for the entire basin. With the decrease in moisture flux from the downstream to the upstream area, ?¹⁸O in precipitation became gradually decreased. However, in terms of temporal variations, higher ?¹⁸O in precipitation during spring is linked to small moisture flux while low ?¹⁸O in precipitation during summer is linked to large moisture flux. A model involving meteorological data from NCEP/NCAR was subsequently set up which successfully traced the moisture transport trajectories at Yangcun station. Based on the traced moisture transport trajectories and the ?¹⁸O in precipitation at Yangcun station, the relationship between ?¹⁸O in precipitation in Yarlungzangbo River basin and the moisture transport history was discussed. We found that the humid marine air mass from the Indian Ocean in general has significantly lower ?¹⁸O values than the continental air mass from the north or local re-evaporation. The fluctuation of ?¹⁸O in precipitation during the monsoon season is very pronounced; the lower values are usually related to farther distance and multilayer moisture transport, as well as moisture crossing the Himalaya Mountains.

Issue Date: 05 March 2008

Cite this article:

LIU Zhongfang,TIAN Lide,YAO Tandong, et al. Influence of moisture transport on stable isotope in precipitation in Yarlungzangbo River basin[J]. Front. Earth Sci., 0, (): 49-57.

URL:

https://academic.hep.com.cn/fesci/EN/10.1007/s11707-008-0012-2
https://academic.hep.com.cn/fesci/EN/Y0/V/I/49

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