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Temporal and spatial variations of δ18O in precipitation of the Yarlung Zangbo River Basin.
- Source :
- Journal of Geographical Sciences; Jul2007, Vol. 17 Issue 3, p317-326, 10p
- Publication Year :
- 2007
-
Abstract
- This paper reveals the temporal and spatial variations of stable isotope in precipitation of the Yarlung Zangbo River Basin based on the variations of δ<superscript>18</superscript>O in precipitation at four stations (Lhaze, Nugesha, Yangcun and Nuxia) in 2005. The results show that δ<superscript>18</superscript>O of precipitation has distinct seasonal changes in the Yarlung Zangbo River Basin. The higher value of δ<superscript>18</superscript>O occurs in spring prior to monsoon precipitation, and the lower value occurs during monsoon precipitation. From the spatial variations, with the altitude-effect and rainout process during moisture transport along the Yarlung Zangbo River Valley, <superscript>18</superscript>O of precipitation is gradually depleted. Thus, δ<superscript>18</superscript>O of precipitation decreases gradually from the downstream to the upstream, and the lapse rate of δ<superscript>18</superscript>O in precipitation is approximately 0.34‰/100m and 0.7‰/100km for the two reasons. During monsoon precipitation, spatial variation of δ<superscript>18</superscript>O in precipitation is dominated by the amount effect in the large scale synoptic condition. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1009637X
- Volume :
- 17
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Journal of Geographical Sciences
- Publication Type :
- Academic Journal
- Accession number :
- 49568192
- Full Text :
- https://doi.org/10.1007/s11442-007-0317-1