Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 13
Articles | Volume 25, issue 13
https://doi.org/10.5194/acp-25-7161-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-7161-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 13
Research article
 | 
11 Jul 2025
Research article |  | 11 Jul 2025

Australian bushfire emissions result in enhanced polar stratospheric clouds

Srinivasan Prasanth, Narayana Sarma Anand, Kudilil Sunilkumar, Subin Jose, Kenath Arun, Sreedharan K. Satheesh, and Krishnaswamy Krishna Moorthy

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Short summary
We study the impact of the 2019–2020 Australian bushfires on stratospheric chemistry and polar stratospheric cloud (PSC) dynamics. Our results show that the stratospheric intrusion of bushfire aerosols significantly increases nitric acid in the lower stratosphere, thereby increasing the PSC volume during the Austral winter. Notably, rapid ice PSC nucleation on nitric acid trihydrate particles leads to unusually high ice PSC volumes, highlighting the response of PSCs to an enhanced stratospheric aerosol scenario.
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