Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 19
Articles | Volume 25, issue 19
https://doi.org/10.5194/acp-25-11633-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-11633-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 19
Research article
 | 
30 Sep 2025
Research article |  | 30 Sep 2025

Moisture sources and dynamics over the Southeast Tibetan Plateau reflected in dual water vapor isotopes

Zhongyin Cai, Rong Li, Cheng Wang, Qiukai Mao, and Lide Tian

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Short summary
Local and upstream specific humidity is the main factor determining non-monsoon season d-excess variability over southeast Tibetan Plateau (TP) due to the intrusion of cold and dry air from upper levels. During the summer monsoon season, d-excess and δ18O mainly reflect the effect of raindrop evaporation which leads to lower vapor δ18O but higher d-excess values. These findings provide new insights into using water isotopes to track moisture sources and dynamics over the TP.
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