TY - JOUR
T1 - O3 photochemistry on O3 episode days and non-O3 episode days in Wuhan, Central China
AU - Zhu, Jiaxin
AU - Cheng, Hairong
AU - Peng, Jin
AU - Zeng, Pei
AU - Wang, Zuwu
AU - Lyu, Xiaopu
AU - Guo, Hai
N1 - Funding Information:
This study was supported by the National Key R&D Program of China (grant numbers 2017YFC0212603 ), the Natural Science Foundation of China (NSFC) (grant number 41673102 ), and Wuhan Youth Science and Technology Program (grant number 2017050304010310 ). Appendix A
Funding Information:
This study was supported by the National Key R&D Program of China (grant numbers 2017YFC0212603), the Natural Science Foundation of China (NSFC) (grant number 41673102), and Wuhan Youth Science and Technology Program (grant number 2017050304010310).
Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2020/2
Y1 - 2020/2
N2 - Simultaneous field measurements of ozone (O3) and its precursors were conducted at an urban site (Zi Yang, ZY) and a suburban site (Huang Pi, HP) in August 2018 in Wuhan, China. The observation results revealed that the mean levels of nitric oxide (NO), nitrogen dioxide (NO2), carbon monoxide (CO) and non-methane hydrocarbons (NMHCs) were higher at ZY than those detected at HP, while the opposite trend was observed for O3 levels. Compared to non-O3 episode days, higher levels of O3 and its precursors (i.e. NMHCs, NO and CO) were observed on O3 episode days at both ZY and HP. A chemical box model was used to investigate the O3 photochemistry on O3 episode days and non-O3 episode days at ZY and HP, and the O3 production was found to be dominated by the reaction of HO2 + NO at the two sites. In terms of O3 destruction, OH + NO2 was the major contributor at ZY, while the highest contribution at HP was from the reaction of O(1D) + H2O. The net O3 production rates increased significantly from non-O3 episode days to O3 episode days at both ZY and HP, indicating increased O3 accumulation on O3 episode days. In addition, the model simulation indicated that O3 formation was controlled by volatile organic compounds (VOCs) at ZY, whereas O3 formation was cooperative controlled by VOCs and NO at HP. Overall, these findings can provide valuable information on formulating and implementing O3 control strategies in urban and suburban areas in China.
AB - Simultaneous field measurements of ozone (O3) and its precursors were conducted at an urban site (Zi Yang, ZY) and a suburban site (Huang Pi, HP) in August 2018 in Wuhan, China. The observation results revealed that the mean levels of nitric oxide (NO), nitrogen dioxide (NO2), carbon monoxide (CO) and non-methane hydrocarbons (NMHCs) were higher at ZY than those detected at HP, while the opposite trend was observed for O3 levels. Compared to non-O3 episode days, higher levels of O3 and its precursors (i.e. NMHCs, NO and CO) were observed on O3 episode days at both ZY and HP. A chemical box model was used to investigate the O3 photochemistry on O3 episode days and non-O3 episode days at ZY and HP, and the O3 production was found to be dominated by the reaction of HO2 + NO at the two sites. In terms of O3 destruction, OH + NO2 was the major contributor at ZY, while the highest contribution at HP was from the reaction of O(1D) + H2O. The net O3 production rates increased significantly from non-O3 episode days to O3 episode days at both ZY and HP, indicating increased O3 accumulation on O3 episode days. In addition, the model simulation indicated that O3 formation was controlled by volatile organic compounds (VOCs) at ZY, whereas O3 formation was cooperative controlled by VOCs and NO at HP. Overall, these findings can provide valuable information on formulating and implementing O3 control strategies in urban and suburban areas in China.
KW - Central China
KW - Diurnal variation
KW - Ozone
KW - Photochemistry
UR - http://www.scopus.com/inward/record.url?scp=85077336726&partnerID=8YFLogxK
U2 - 10.1016/j.atmosenv.2019.117236
DO - 10.1016/j.atmosenv.2019.117236
M3 - Journal article
AN - SCOPUS:85077336726
SN - 1352-2310
VL - 223
JO - Atmospheric Environment
JF - Atmospheric Environment
M1 - 117236
ER -
