Articles | Volume 25, issue 5
https://doi.org/10.5194/acp-25-3011-2025
https://doi.org/10.5194/acp-25-3011-2025
Research article
 | 
13 Mar 2025
Research article |  | 13 Mar 2025

Accurate elucidation of oxidation under heavy ozone pollution: a full suite of radical measurements in the chemically complex atmosphere

Renzhi Hu, Guoxian Zhang, Haotian Cai, Jingyi Guo, Keding Lu, Xin Li, Shengrong Lou, Zhaofeng Tan, Changjin Hu, Pinhua Xie, and Wenqing Liu

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Cited articles

Duan, J., Qin, M., Ouyang, B., Fang, W., Li, X., Lu, K., Tang, K., Liang, S., Meng, F., Hu, Z., Xie, P., Liu, W., and Häsler, R.: Development of an incoherent broadband cavity-enhanced absorption spectrometer for in situ measurements of HONO and NO2, Atmos. Meas. Tech., 11, 4531–4543, https://doi.org/10.5194/amt-11-4531-2018, 2018. 
Färber, M., Fuchs, H., Bohn, B., Carlsson, P. T. M., Gkatzelis, G. I., Marcillo Lara, A. C., Rohrer, F., Vereecken, L., Wedel, S., Wahner, A., and Novelli, A.: Effect of the Alkoxy Radical Chemistry on the Ozone Formation from Anthropogenic Organic Compounds Investigated in Chamber Experiments, ACS ES&T Air, 1, 1096–1111, https://doi.org/10.1021/acsestair.4c00064, 2024. 
Fuchs, H., Holland, F., and Hofzumahaus, A.: Measurement of tropospheric RO2 and HO2 radicals by a laser-induced fluorescence instrument, Rev. Sci. Instrum., 79, 084104, https://doi.org/10.1063/1.2968712, 2008. 
George, L. A., Hard, T. M., and O'Brien, R. J.: Measurement of free radicals OH and HO2 in Los Angeles smog, J. Geophys. Res.-Atmos., 104, 11643–11655, 1999. 
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Short summary
A full suite of radical measurements (OH, HO2, RO2, and kOH) was established to accurately elucidate the limitations of oxidation in a chemically complex atmosphere. Sensitivity tests revealed that the incorporation of complex processes enabled a balance in both radical concentrations and coordinate ratios, effectively addressing the deficiency in the ozone generation mechanism. The full-chain radical detection bridged the gap between the photochemistry and the intensive oxidation level.
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