globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.atmosres.2018.06.012
Scopus ID: 2-s2.0-85048805095
Observations of ozone vertical profiles and corresponding precursors in the low troposphere in Beijing, China
Author: Chi X.; Liu C.; Xie Z.; Fan G.; Wang Y.; He P.; Fan S.; Hong Q.; Wang Z.; Yu X.; Yue F.; Duan J.; Zhang P.; Liu J.
Source Publication: Atmospheric Research
ISSN: 1698095
Publishing Year: 2018
Volume: 213
pages begin: 224
pages end: 235
Language: 英语
Keyword: Haze ; Ozone ; Photochemical production ; Vertical profile
Scopus Keyword: Absorption spectroscopy ; Aerosols ; Boundary layer flow ; Boundary layers ; Industrial emissions ; Light absorption ; Nitrogen oxides ; Optical radar ; Ozone ; Ozone layer ; Sensitivity analysis ; Troposphere ; Urban growth ; Aerosol extinction coefficient ; Chinese Academy of Sciences ; Differential absorption lidars ; Differential optical absorption spectroscopy ; Haze ; Photochemical production ; Vertical column densities ; Vertical profile ; Air pollution ; atmospheric pollution ; boundary layer ; extinction coefficient ; haze ; ozone ; photochemistry ; troposphere ; vertical profile ; volatile organic compound ; Beijing [China] ; China ; Hebei
English Abstract: A comprehensive investigation of ozone, its precursors as well as aerosols in the low troposphere was conducted over the University of Chinese Academy of Sciences site (abbreviated as UCAS site, a northern suburban site) in Beijing during the period of October 26 to November 6, 2014, with a focus on the comparison between polluted and clean conditions. The vertical profiles of ozone and aerosol extinction coefficients in the low troposphere were measured by differential absorption lidar, and the tropospheric vertical column densities (VCDs) as well as vertical profiles of HCHO and NO2 were measured by ground-based Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS). O3 in the boundary layer (0.3–1.0 km) had a positive gradient with height and presented a stratified structure at night on haze days, in contrast to a uniform distribution during clean episodes. The polluted conditions were characterized by higher levels of atmospheric pollutants (O3, aerosol, HCHO and NO2) and more dynamic variations with respect to clean periods. During lightly to moderately polluted periods, elevated concentrations of O3 within the boundary layer were observed with a maximum exceeding 60 ppbv. In haze days, the air masses from urban Beijing and southern Hebei industrial and urbanized areas could bring large amounts of precursors, enhancing O3 formation over the lidar site. The photochemical production of O3 within the boundary layer was controlled by a VOC-limited regime in haze days and turned into a mixed-VOC-NOx-limited regime on clean days. According to sensitivity analysis, when air masses came from southern polluted regions, the sensitivity of ozone production was dominated by VOC-limited regime. The reduction of VOC emissions from urban Beijing and Hebei industrial and urbanized areas would favor the mitigation of O3 pollution at UCAS site. © 2018 Elsevier B.V.
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被引频次[WOS]:7   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Appears in Collections:影响、适应和脆弱性

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Affiliation: School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; Key Lab of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, 230031, China; Max Planck Institute for Chemistry, Mainz, 55128, Germany; School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China; Department of Earth and Atmospheric Sciences, City College of New York, New York, NY 10031, United States

Recommended Citation:
Chi X.,Liu C.,Xie Z.,et al. Observations of ozone vertical profiles and corresponding precursors in the low troposphere in Beijing, China[J]. Atmospheric Research,2018-01-01,213
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