Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 7
Articles | Volume 25, issue 7
https://doi.org/10.5194/acp-25-4013-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-4013-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 7
Research article
 | 
09 Apr 2025
Research article |  | 09 Apr 2025

One-year continuous observations of near-surface atmospheric water vapor stable isotopes at Matara, Sri Lanka, reveal a strong link to moisture sources and convective intensity

Yuqing Wu, Jing Gao, Aibin Zhao, Xiaowei Niu, Yigang Liu, Disna Ratnasekera, Tilak Priyadarshana Gamage, and Amarasinghe Hewage Ruwan Samantha

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Short summary
Monitoring of atmospheric water vapor isotopes for 1 year at Matara, Sri Lanka, revealed clear seasonal variations in δ18O and d-excess. The results showed lower amplitudes of δ18O during the southwest monsoon and higher amplitudes of δ18O during the northeast monsoon. Sea surface evaporation and regional convective activity influenced the isotopic compositions. Our results facilitate an understanding of the impacts of local meteorological conditions on tropical water vapor isotope signals.
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