Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 21
Articles | Volume 26, issue 21
https://doi.org/10.5194/acp-26-15523-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-15523-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 21
Research article
 | 
04 Nov 2026
Research article |  | 04 Nov 2026

Impacts of synoptic circulation types on nocturnal ozone increase in the North China Plain: meteorological drivers and physical mechanisms

Huanpeng Wang, Liya Fan, Xuejiao Deng, Haomin Huang, and Daiqi Ye

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Short summary
This study investigates how weather types drive nocturnal ozone increase. We resolve four primary weather types in the North China Plain: A-type (57.89 %), S-type (19.88 %), WNE-type (14.04 %), and C-type (8.19 %). Driven by these weather systems, high-pressure subsidence (A-type), cold pool subsidence and shallow convection (C-type), synoptically-driven wind shear (S-type and WNE-type) act as key drivers, facilitating the intrusion of ozone-rich air to the surface.
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