Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 10
Articles | Volume 26, issue 10
https://doi.org/10.5194/acp-26-7047-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/acp-26-7047-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 10
Research article
 | 
22 May 2026
Research article |  | 22 May 2026

Large ozone enhancement over South Asia triggered by sudden stratospheric warming under westerly QBO phase: implications on ozone radiative forcing

Shubhajyoti Roy, Satheesh P. R. Chandran, Suvarna Fadnavis, Vijay Sagar, Michaela I. Hegglin, Rolf Müller, and Prashant Chavan

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Short summary
We show that stratospheric ozone intrusions associated with sudden stratospheric warming events occurring concurrent with the westerly phase of the Quasi-biennial oscillation enhance ozone in the upper troposphere and lower stratosphere over South Asia. The ozone enhancement increases ozone radiative forcing by 0.09±0.05 W m-2 over South Asia. This increase in ozone radiative forcing potentially exacerbates regional climate warming.
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