Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 15
Articles | Volume 26, issue 15
https://doi.org/10.5194/acp-26-10789-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-10789-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 15
Research article
 | 
03 Aug 2026
Research article |  | 03 Aug 2026

Direct thermal enhancement dominates over emission-mediated pathways in heatwave-induced O3 and SOA increases across China

Peng Wang, Wenxuan Yu, Zhaolei Zhang, Jianyan Lu, Shenxin Li, and Hongliang Zhang

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Short summary
Heatwaves worsen ozone and secondary organic aerosol pollution. We quantified how much comes from heat speeding up chemical reactions versus increasing natural emissions in China. High temperatures drive over 80 % of the pollution increase nationwide by making the atmosphere more chemically reactive. The effect was strongest in the Yangtze River Delta and Pearl River Delta. Limiting climate change is essential for controlling future pollution and protecting health.
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