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Exploring formation mechanism and source attribution of ozone during the 2019 Wuhan Military World Games:Implications for ozone control strategies

查看全文 作　　者：Lei [1,2]Zhang;Lili [1]Wang;Runyu [1,2]Wang;Nan [3]Chen;Yuan [4]Yang;Ke [5]Li;Jie [1]Sun;Dan [6]Yao;Yuesi [1,2]Wang;Minghui [7]Tao;Yang [1]Sun 高影响力作者 机构地区：[1]Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China;[2]University of the Chinese Academy of Sciences,Beijing 100049,China;[3]Hubei Ecological Environment Monitoring Center Station,Wuhan 430072,China;[4]Guizhou Research and Designing Institute of Environmental Sciences,Guizhou Academy of Environmental Science and Design,Guiyang 550081,China;[5]Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control,Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology,School of Environmental Science and Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,China;[6]School of Environment,Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control,Ministry of Education,Henan Normal University,Xinxiang 453007,China;[7]Key Laboratory of Regional Ecology and Environmental Change,School of Geography and Information Engineering,China University of Geosciences,Wuhan 430074,China高影响力机构 出　　处：《Journal of Environmental Sciences》索引2024年第2期,共12页高影响力期刊 基　　金：supported by the National Key Research and Development Program of China (No.2022YFE0136100);the National Natural Science Foundation of China (No.41505133,41775162,and 42061130215);the Royal Society Newton Advanced Fellowship (No.NAFR1201354);the Beijing Major Science and Technology Project (No.Z211100004321006)。 摘　　要：A series of emission reduction measures were conducted in Wuhan,Central China,to ensure good air quality during the 7th Military World Games(MWG)in October 2019.To better understand the implications for ozone(O_(3))pollution control strategies,we applied integrated analysis approaches based on the de-weathered statistical model,parameterization methods,chemical box model,and positive matrix factorization model.During the MWG,concentrations of O_(3),NO_x,and volatile organic compound(VOCs),OFP(O_(3)formation potential),L_(OH)(OH radical loss rate)were 83μg/m^(3),43μg/m^(3),26 ppbv,188μg/m^(3),and 3.9 s^(-1),respectively,which were 26%,18%,3%,15%,and 13%lower than pre-MWG values and 6%,39%,30%,33%,and 50%lower than post-MWG values,respectively.After removing meteorological influence,O_(3)and its precursors during the MWG decreased largely compared with post-MWG values,and only O_(3),NO_(2),and oxygenated VOCs(OVOCs)declined compared with pre-MWG values,which revealed the emission reduction measures during the MWG played an important role for O_(3)decline.For six VOCs sources,the mass contributions of biomass burning and solvents usage during the MWG decreased largely compared with pre-MWG values.O_(3)production was sensitive to VOCs and the key species were aromatics,OVOCs,and alkenes,which originated mainly from solvents usage,biomass burning,industrial-related combustion,and vehicle exhaust.Decreasing O_(3)concentration during the strict control was mainly caused by OVOCs reduction due to biomass burning control.Generally,the O_(3)abatement strategies of Wuhan should be focused on the mitigation of high-reactivity VOCs. 关 键 词：VOCs OZONE Wuhan Military World Games Source apportionment Relative incremental reactivity Random forest
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