Ground-Level Ozone Production over an Industrial Cluster of China: a Box Model Analysis of a Severe Photochemical Pollution Episode
Ground-Level Ozone Production over an Industrial Cluster of China: a Box Model Analysis of a Severe Photochemical Pollution Episode
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DOI：
10.15244/pjoes/143253
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发表时间：
2022-02
影响因子：
1.8
通讯作者：
Xue Yang;Xiangpu Cheng;Huaizhong Yan;Youmin Sun;Guiqin Zhang
中科院分区：
文献类型：
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作者：
Xue Yang;Xiangpu Cheng;Huaizhong Yan;Youmin Sun;Guiqin Zhang
To better understand the characteristics and processes of ozone formation over the industrial cluster of China, intensive field measurements of atmospheric O 3 , volatile organic compounds (VOCs), and related parameters were conducted in a typical industrialized city of China, Zibo, from July 1 to July 31, 2018. Monitoring data and comparison with other observations revealed severe O 3 pollution in Zibo with high frequency (~55%) of the non-attainment O 3 episodes and high average O 3 levels (~42 ppbv). An observation-constrained chemical box model (OBM) was deployed to dissect the O 3 formation mechanism and ozone-precursor relationship during a severe photochemical smog episode. O 3 was produced by NO + HO 2 and NO + RO 2 reaction and destroyed via the NO 2 + RO 2 and NO 2 + OH reaction. The observed O 3 pollution was dominated by intense in-situ O 3 chemical formation with regional transport playing a negative contribution. Sensitivity studies suggested that in situ O 3 production was in a VOC-limited or mixed-control regime with aromatics (mainly 1,3,5-Trimethylbenzene and toluene) being the dominant parent hydrocarbons of O 3 . The OBM and positive matrix factorization (PMF) results indicated that the most efficient way to alleviate the O 3 pollution in Zibo is to reduce emissions of aromatics from solvent use, industrial processes and vehicles.
