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.
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.
the Creative Commons Attribution 4.0 License.
Research article
| 
30 Sep 2025
Research article |
| 30 Sep 2025
| 30 Sep 2025
Moisture sources and dynamics over the Southeast Tibetan Plateau reflected in dual water vapor isotopes
Zhongyin Cai
CORRESPONDING AUTHOR
Institute of International Rivers and Eco-security, Yunnan Key Laboratory of International Rivers and Transboundary Eco-security, State Key Laboratory of Vegetation Structure, Function and Construction (VegLab), Yunnan University, Kunming, 650500, China
Rong Li
Institute of International Rivers and Eco-security, Yunnan Key Laboratory of International Rivers and Transboundary Eco-security, State Key Laboratory of Vegetation Structure, Function and Construction (VegLab), Yunnan University, Kunming, 650500, China
Cheng Wang
Institute of International Rivers and Eco-security, Yunnan Key Laboratory of International Rivers and Transboundary Eco-security, State Key Laboratory of Vegetation Structure, Function and Construction (VegLab), Yunnan University, Kunming, 650500, China
Qiukai Mao
Institute of International Rivers and Eco-security, Yunnan Key Laboratory of International Rivers and Transboundary Eco-security, State Key Laboratory of Vegetation Structure, Function and Construction (VegLab), Yunnan University, Kunming, 650500, China
Lide Tian
Institute of International Rivers and Eco-security, Yunnan Key Laboratory of International Rivers and Transboundary Eco-security, State Key Laboratory of Vegetation Structure, Function and Construction (VegLab), Yunnan University, Kunming, 650500, China
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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.
Local and upstream specific humidity is the main factor determining non-monsoon season d-excess...
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