A comprehensive study on ozone pollution in a megacity in North China Plain during summertime: Observations, source attributions and ozone sensitivity

doi:10.1016/j.envint.2020.106279

CORC > 地球环境研究所 > 中国科学院地球环境研究所 > 粉尘与环境研究室

	A comprehensive study on ozone pollution in a megacity in North China Plain during summertime: Observations, source attributions and ozone sensitivity
	Sun, Jian 1,3; Shen, Zhenxing 1,3; Wang, Ruonan 1; Li, Guohui 1; Zhang, Yue 3; Zhang, Bin 3; He, Kun 3; Tang, Zhuoyue 3; Xu, Hongmei 3; Qu, Linli 4
刊名	ENVIRONMENT INTERNATIONAL
	2021
卷号	146 页码:14
关键词	VOCs Tropospheric ozone NOx WRF-CHEM Pollution control
ISSN号	0160-4120
DOI	10.1016/j.envint.2020.106279
通讯作者	Shen, Zhenxing(zxshen@mail.xjtu.edu.cn)
英文摘要	Tropospheric ozone (O-3) pollution has been becoming prominent in North China Plain (NCP) in China since last decade. In order to clarify the source contribution and formation mechanism of O-3, the critical precursors of volatile organic compounds (VOCs) were measured with both on-line and off-line methods in Luoyang City in summer of 2019. The concentrations of nitrogen oxides (NOx, sum of NO and NO2) and O-3 were simultaneously monitored. Fifty-seven VOCs measured in U.S. Photochemical Assessment Monitoring Station (PAMS) showed daily concentrations in a range of 14.5 +/- 5.33 to 29.2 +/- 11.2 ppbv in Luoyang, which were comparable with those in other Chinese megacities. The mass compositions of VOCs were determined, with comparatively low proportions of alkanes (<50%) but high fractions of photoreactive alkenes and alkyne. Source apportionment of VOCs was conducted by Hybrid Environmental Receptor Model (HERM). The results indicated that industrial (38.5%) and traffic (32.0%) were the two dominated pollution sources of VOCs in the urban, while the biogenic and residential sources had contributions of 15.8% and 13.8%, respectively. To further measure the O-3 formation sensitivity and its source attribution, the WRF-CHEM model was adopted in this study. The variation of O3 between the observation and the stimulation using the local emission inventory showed an index of agreement (IOA) of 0.85. The simulation conducted by WRF-CHEM indicated an average of 43.5% of the O-3 was associated with the regional transportation, revealing the importance of inter-regional prevention and control policy. Traffic and biogenic emissions were the two major pollution sources to an O-3 episode occurred from July 21 to July 27, 2019 (when O-3 concentration over 150 mu gm(-3)) in Luoyang, with average contributions of 22.9% and 18.3%, respectively. The O-3 isopleths proved that its formation in the atmosphere of Luoyang was in transitional regime and collectively controlled by both VOCs and NOx. This was different from the observations in main cities of NCP before implantations of strict emission controls. The isopleths additionally designated that the O-3 formation regime would move forward or shift to NOx regime after a reduction of over 45% during the episode. Similar patterns were also reported in other Chinese megacities such as Beijing and Shanghai, due to the tightening of the NOx control policies. Our results do support that the simultaneous controls of NOx and VOCs were effective in reductions of tropospheric O-3 in Luoyang. Meanwhile, joint regional control policies on the emissions of NOx and VOCs can potentially overwhelm the current O-3 pollutions in China.
资助项目	Natural Science Foundation of China[41907188] ; Natural Science Foundation of Shaanxi Province, China[2019JQ-386] ; China Postdoctoral Science Foundation[2019M653658]
WOS关键词	VOLATILE ORGANIC-COMPOUNDS ; YANGTZE-RIVER DELTA ; SOURCE APPORTIONMENT ; TROPOSPHERIC OZONE ; COMPOUNDS VOCS ; MEXICO-CITY ; WRF-CHEM ; METEOROLOGICAL UNCERTAINTIES ; GUANZHONG BASIN ; SURFACE O-3
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000604625600007
资助机构	Natural Science Foundation of China ; Natural Science Foundation of Shaanxi Province, China ; China Postdoctoral Science Foundation
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/15765]
专题	地球环境研究所_粉尘与环境研究室
通讯作者	Shen, Zhenxing
作者单位	1.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710049, Peoples R China 2.Desert Res Inst, Div Atmospher Sci, Reno, NV 89512 USA 3.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Peoples R China 4.Hong Kong Premium Serv & Res Lab, Kowloon, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Sun, Jian,Shen, Zhenxing,Wang, Ruonan,et al. A comprehensive study on ozone pollution in a megacity in North China Plain during summertime: Observations, source attributions and ozone sensitivity[J]. ENVIRONMENT INTERNATIONAL,2021,146:14.
APA	Sun, Jian.,Shen, Zhenxing.,Wang, Ruonan.,Li, Guohui.,Zhang, Yue.,...&Cao, Junji.(2021).A comprehensive study on ozone pollution in a megacity in North China Plain during summertime: Observations, source attributions and ozone sensitivity.ENVIRONMENT INTERNATIONAL,146,14.
MLA	Sun, Jian,et al."A comprehensive study on ozone pollution in a megacity in North China Plain during summertime: Observations, source attributions and ozone sensitivity".ENVIRONMENT INTERNATIONAL 146(2021):14.