Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 11
Articles | Volume 26, issue 11
https://doi.org/10.5194/acp-26-7867-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-7867-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 11
Research article
 | 
05 Jun 2026
Research article |  | 05 Jun 2026

Impacts of lake on diurnal evolution of surface PM2.5 concentrations around a typical megacity of China

Zining Yang, Qike Yang, Chun Zhao, Zihan Xia, Qiuyan Du, Gudongze Li, Mingyue Xu, Zhiyuan Hu, Renmin Yuan, Jiawang Feng, Jun Gu, and Yubin Li

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Short summary
This study uses 1 km resolution Weather Research and Forecasting model coupled with 
Chemistry (WRF-Chem) simulations to investigate how Lake Chaohu affects fine 
particulate matter (PM2.5) in Hefei. The lake shows a diurnal reversal, increasing 
daytime pollution by secondary aerosol formation and storage zones with suppressed 
mixing and low deposition, while purifying urban air at night through enhanced vertical 
mixing. Lake emission treatment affects lake-urban air quality assessments.
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