Impacts of aerosol–photolysis interaction and aerosol–radiation feedback on surface-layer ozone in North China during multi-pollutant air pollution episodes

Yang, Hao; Chen, Lei; Liao, Hong; Zhu, Jia; Wang, Wenjie; Li, Xin

doi:https://doi.org/10.5194/acp-22-4101-2022

Articles | Volume 22, issue 6

https://doi.org/10.5194/acp-22-4101-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-22-4101-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 22, issue 6

Research article

|

29 Mar 2022

Research article |

| 29 Mar 2022

Impacts of aerosol–photolysis interaction and aerosol–radiation feedback on surface-layer ozone in North China during multi-pollutant air pollution episodes

Hao Yang, Lei Chen, Hong Liao, Jia Zhu, Wenjie Wang, and Xin Li

Supplement

https://doi.org/10.5194/acp-22-4101-2022-supplement

Data sets

Hourly/Sub-Hourly Observational Data National Centers for Environmental Information https://www.ncei.noaa.gov/maps/hourly/

Aeronet NASA http://aeronet.gsfc.nasa.gov/

Air pollutants dataset in China China National Environmental Monitoring Centre (CNEMC) https://air.cnemc.cn:18007/

Upper Air Observations University of Wyoming http://weather.uwyo.edu/upperair/sounding.html

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Short summary

Aerosols can influence O₃ through aerosol–radiation interactions, including aerosol–photolysis interaction (API) and aerosol–radiation feedback (ARF). The weakened photolysis rates and changed meteorological conditions reduce surface-layer O₃ concentrations by up to 9.3–11.4 ppb, with API and ARF contributing 74.6 %–90.0 % and 10.0 %–25.4 % of the O₃ decrease in three episodes, respectively, which indicates that API is the dominant way for O₃ reduction related to aerosol–radiation interactions.