Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 16
Articles | Volume 25, issue 16
https://doi.org/10.5194/acp-25-9127-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-9127-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 16
Research article
 | 
22 Aug 2025
Research article |  | 22 Aug 2025

Global patterns and trends in ground-level ozone chemical formation regimes from 1996 to 2022

Yu Tian, Siyi Wang, and Xiaomeng Jin

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Short summary
We leverage over 2 decades of ground-based ozone observations alongside space-based observations of ozone precursors (NO2 and formaldehyde) to study the long-term evolution in ozone chemical regimes across global source regions. We find a global trend towards NOx-limited regimes supported by increasing satellite-based HCHO/NO2 ratio and a diminishing ozone weekend effect.
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