Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 24, issue 5
Articles | Volume 24, issue 5
https://doi.org/10.5194/acp-24-3279-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-24-3279-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 24, issue 5
Research article
 | 
15 Mar 2024
Research article |  | 15 Mar 2024

Spring tropical cyclones modulate near-surface isotopic compositions of atmospheric water vapour in Kathmandu, Nepal

Niranjan Adhikari, Jing Gao, Aibin Zhao, Tianli Xu, Manli Chen, Xiaowei Niu, and Tandong Yao

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Short summary
Atmospheric water vapour isotopes at Kathmandu recorded significantly low δ18Ov and δDv values during cyclones Tauktae and Yaas in 2021, originating in the Arabian Sea and Bay of Bengal, respectively. Such depletion was associated with the intense moisture convergence and strong convection near the sampling site. The lower δ18Ov and higher d-excessv values during cyclone Yaas may be attributed to the occurrence of robust downdrafts during the rainfall.
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