Gaining quantitative information about the HO_x cycle involved in ozone (O₃) production is important for reduction of tropospheric O₃. In this study, we evaluated the impacts of both the missing OH reactivity and the heterogeneous loss of HO₂ due to ambient aerosol uptake on the photochemical O₃ production potential and regime analysis during the Air QUAlity Study (AQUAS)-Kyoto summer campaign in 2018. We examined the missing OH reactivity, which was 50% of the averaged total OH reactivity (9.8 ± 3.8 (1σ) s⁻¹), and the uptake loss rate of HO₂ on ambient aerosols of 0.0017 ± 0.0015 s⁻¹. The real-time uptake loss rate of HO₂ was measured by employing a versatile aerosol concentration enrichment system (VACES). The O₃ production potential increased by a factor of two when the missing OH reactivity was considered and decreased by ∼20% when the HO₂ loss due to aerosol uptake was considered. In addition, the missing OH reactivity and the HO₂ loss due to aerosol uptake decreased the relative sensitivity of the O₃ production rate to volatile organic compounds (VOCs) and increased that to NO_x (= NO + NO₂). Consequently, the NO_x limited regime period, the period in which the relative sensitivity of the O₃ production rate to NO_x was higher than that to VOCs, was expanded by a few hours. Finally, the effect of aerosol uptake on O₃ production was anti-correlated with the NO concentration and peaked around noon when the NO concentration was the minimum. It is concluded that aerosols likely affect tropospheric O₃ production in suburban and rural areas, where the concentrations of NO_x, particularly NO, are very low ([NO] < 0.3 ppb).

_{获得与臭氧 (O 3 ) 产生有关的 HO x}循环的定量信息对于减少对流层 O ₃很重要。在这项研究中，我们评估了2018 年空气质量研究 (AQUAS)-京都夏季活动期间由于环境气溶胶吸收而导致的 OH 反应性缺失和 HO _{2的异质损失对光化学 O 3}生产潜力和状态分析的影响。 . 我们检查了缺失的 OH 反应性，这是平均总 OH 反应性的 50% (9.8 ± 3.8 (1σ) s ^{-1 )，以及 HO} ₂在环境气溶胶上的吸收损失率为0.0017 ± 0.0015 s ^-1。H2O的实时吸收损失率₂通过使用多功能气溶胶浓缩系统 (VACES) 测量。当考虑到缺少的 OH 反应性时，O ₃生产潜力增加了两倍，而当考虑到气溶胶吸收导致的 HO ₂损失时，生产潜力降低了约 20%。此外，由于气溶胶吸收导致的OH 反应性缺失和 HO _{2损失降低了 O 3}产率对挥发性有机化合物 (VOC) 的相对敏感性，并增加了对 NO _x (= NO + NO ₂ ) 的敏感性。因此，NO _x限制状态期，即 O ₃产率对 NO _{x的相对敏感性的时期}高于 VOC，扩大了几个小时。最后，气溶胶吸收对O ₃产生的影响与NO浓度呈反相关，并在中午NO浓度最低时达到峰值。得出的结论是，气溶胶可能会影响郊区和农村地区的对流层 O _{3产生，这些地区的 NO x}，特别是 NO 的浓度非常低（[NO] < 0.3 ppb）。