Articles | Volume 24, issue 3
https://doi.org/10.5194/acp-24-1825-2024
https://doi.org/10.5194/acp-24-1825-2024
Research article
 | 
08 Feb 2024
Research article |  | 08 Feb 2024

Intensive photochemical oxidation in the marine atmosphere: evidence from direct radical measurements

Guoxian Zhang, Renzhi Hu, Pinhua Xie, Changjin Hu, Xiaoyan Liu, Liujun Zhong, Haotian Cai, Bo Zhu, Shiyong Xia, Xiaofeng Huang, Xin Li, and Wenqing Liu

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Cited articles

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Chen, W., Guenther, A. B., Shao, M., Yuan, B., Jia, S., Mao, J., Yan, F., Krishnan, P., and Wang, X.: Assessment of background ozone concentrations in China and implications for using region-specific volatile organic compounds emission abatement to mitigate air pollution, Environ. Pollut., 305, 119254, https://doi.org/10.1016/j.envpol.2022.119254, 2022. 
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Short summary
Comprehensive observation of HOx radicals was conducted at a coastal site in the Pearl River Delta. Radical chemistry was influenced by different air masses in a time-dependent way. Land mass promotes a more active photochemical process, with daily averages of 7.1 × 106 and 5.2 × 108 cm−3 for OH and HO2 respectively. The rapid oxidation process was accompanied by a higher diurnal HONO concentration, which influences the ozone-sensitive system and eventually magnifies the background ozone.
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