Biogenic volatile organic compounds dominated the near-surface ozone generation in Sichuan Basin,China,during fall and wintertime  

作　　者：Dasheng Huang Qing Li Yan Han Shi-Yong Xia Jiawei Zhou Hanxiong Che Keding Lu Fumo Yang Xin Long Yang Chen 

机构地区：[1]Research Center for Atmospheric Environment,Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences,Chongqing 400714,China [2]Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences,Chongqing 400714,China [3]College of Resources and Environment,Chongqing School,University of the Chinese Academy of Sciences(UCAS Chongqing),Chongqing 400714,China [4]College of Environmental and Chemical Engineering,Chongqing Three Gorges University,Chongqing 404199,China [5]Key Laboratory for Urban Habitat Environmental Science and Technology,School of Environment and Energy,Peking University Shenzhen Graduate School,Lishui Road,Nanshan District,Shenzhen 518055,China [6]SKL-ESPC and BIC-ESAT,College of Environmental Sciences and Engineering,Peking University,Beijing 100871,China [7]College of Architecture&Environment,Sichuan University,Chengdu 610065,China

出　　处：《Journal of Environmental Sciences》2024年第7期215-224,共10页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.42075109);the National Key Research and Development Program of China(No.2018YFC0214001)。

摘　　要：The complex air pollution driven by both Ozone(O_(3))and fine particulate matter(PM2.5)sig nificantly influences the air quality in the Sichuan Basin(SCB).Understanding the O_(3)for mation during autumn and winter is necessary to understand the atmospheric oxidative capacity.Therefore,continuous in-site field observations were carried out during the late summer,early autumn and winter of 2020 in a rural area of Chongqing.The total volatile organic compounds(VOCs)concentration reported by a Proton-Transfer-Reaction Time-of Flight Mass Spectrometry(PTR-ToF-MS)were 13.66±9.75 ppb,5.50±2.64 ppb,and 9.41±5.11 ppb in late summer,early autumn and winter,respectively.The anthropogenic VOCs(AVOCs)and biogenic VOCs(BVOCs)were 8.48±7.92 ppb and 5.18±2.99 ppb in late sum mer,3.31±1.89 ppb and 2.19±0.93 ppb in autumn,and 6.22±3.99 ppb and 3.20±1.27ppb in winter.A zero-dimensional atmospheric box model was employed to investigate the sensitivity of O_(3)-precursors by relative incremental reactivity(RIR).The RIR values of AV OCs,BVOCs,carbon monoxide(CO),and nitrogen oxides(NOx)were 0.31,0.71,0.09,and-0.36 for late summer,0.24,0.59,0.22,and-0.38 for early autumn,and 0.30,0.64,0.33 and-0.70 for winter,and the results showed that the O_(3)formation of sampling area was in the VOC-limited region,and O_(3)was most sensitive to BVOCs(with highest RIR values,>0.6)This study can be helpful in understanding O_(3)formation and interpreting the secondary formation of aerosols in the winter.

关 键 词：VOCS PTR-MS Model OZONE 

分 类 号：X51[环境科学与工程—环境工程]