Liu Jingwei, Li Xin, Tan Zhaofeng, Wang Wenjie, Yang Yiming, Zhu Yuan, Yang Suding, Song Mengdi, Chen Shiyi, Wang Haichao, Lu Keding, Zeng Limin, Zhang Yuanhang
State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.
International Joint Laboratory for Regional Pollution Control, Ministry of Education, Beijing 100816, China.
Environ Sci Technol. 2021 Aug 17;55(16):10935-10945. doi: 10.1021/acs.est.0c07506. Epub 2021 Jul 28.
Ozone (O) pollution has a negative effect on the public health and crop yields. Accurate diagnosis of O production sensitivity and targeted reduction of O precursors [i.e., nitrogen oxides (NO) or volatile organic compounds (VOCs)] are effective for mitigating O pollution. This study assesses the indicative roles of the surface formaldehyde-to-NO ratio (FNR) and glyoxal-to-NO ratio (GNR) on surface O-NO-VOC sensitivity based on a meta-analysis consisting of multiple field observations and model simulations. Thresholds of the FNR and GNR are determined using the relationship between the relative change of the O production rate and the two indicators, which are 0.55 ± 0.16 and 1.0 ± 0.3 for the FNR and 0.009 ± 0.003 and 0.024 ± 0.007 for the GNR. The sensitivity analysis indicated that the surface FNR is likely to be affected by formaldehyde primary sources under certain conditions, whereas the GNR might not be. As glyoxal measurements are becoming increasingly available, using the FNR and GNR together as O sensitivity indicators has broad potential applications.
臭氧（O）污染对公众健康和作物产量有负面影响。准确诊断臭氧生成敏感性并针对性地减少臭氧前体[即氮氧化物（NO）或挥发性有机化合物（VOCs）]对于减轻臭氧污染是有效的。本研究基于由多个实地观测和模型模拟组成的荟萃分析，评估了地表甲醛与NO比值（FNR）和乙二醛与NO比值（GNR）对地表O-NO-VOC敏感性的指示作用。利用臭氧生成速率的相对变化与这两个指标之间的关系确定了FNR和GNR的阈值，FNR的阈值为0.55±0.16和1.0±0.3，GNR的阈值为0.009±0.003和0.024±0.007。敏感性分析表明，在某些条件下，地表FNR可能受甲醛主要来源的影响，而GNR可能不受影响。随着乙二醛测量数据越来越多，将FNR和GNR一起用作臭氧敏感性指标具有广泛的潜在应用。
