DOI: 10.1016/j.atmosres.2017.09.014
Scopus记录号: 2-s2.0-85033462058
论文题名: Aerosol chemical compositions in the North China Plain and the impact on the visibility in Beijing and Tianjin
作者: Zou J. ; Liu Z. ; Hu B. ; Huang X. ; Wen T. ; Ji D. ; Liu J. ; Yang Y. ; Yao Q. ; Wang Y.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2018
卷: 201 起始页码: 235
结束页码: 246
语种: 英语
英文关键词: Aerosol chemical composition
; IMPROVE
; Light extinction coefficients
; North China Plain
; Visibility
Scopus关键词: Aerosols
; Air quality
; Air quality standards
; Combustion
; Factorization
; Fuels
; Light extinction
; Nitrogen compounds
; Particle size
; Pollution
; Sulfur compounds
; Visibility
; Aerosol chemical composition
; Ambient air quality standards
; IMPROVE
; Interagency monitoring of protected visual environments
; Light extinction coefficients
; Non-linear correlations
; North China Plain
; Positive matrix factorization models
; Air pollution
; aerosol
; atmospheric pollution
; chemical composition
; concentration (composition)
; organic matter
; particle size
; relative humidity
; visibility
; Beijing [China]
; China
; North China Plain
; Tianjin
英文摘要: To better understand the characteristics of the chemical compositions of aerosols comprised of water soluble ions (WSIs) and carbonaceous aerosol (CA) and their impacts on the visibility throughout the North China Plain (NCP), four experimental sampling campaigns were carried out between June 2013 and May 2014. The sampling sites were located in Beijing, Xiangshan, Tianjin, Shijiazhuang, and Qinhuangdao. The air pollution episodes mainly occurred during the autumn and winter in the NCP. With regard to different particle size distributions, the ratio of anions to cations in the fine size (0.64) was greater than that in the coarse size (0.54) in the NCP. Coefficients of divergence indicate that aerosol pollution had similar characteristics in the five cities of the NCP and that the pollutants were characterized by mutual influences and regional transfer processes. There were different non-linear correlations between the visibility and mass concentrations of PM2.5 at different relative humidity (RH) conditions. When the RH was > 70%, the visibility was < 5 km; this shows that, due to hygroscopic growth in a higher RH, the increase in PM2.1 resulted in a decrease in the visibility. The Interagency Monitoring of Protected Visual Environments (IMPROVE) method was used to estimate the light extinction coefficients (LEC) from the measured concentrations of chemical species. Organic matter (OM), ammonium nitrate (AN), and ammonium sulfate (AS) were the three dominant species that contributed to the LEC in Beijing and had the highest proportions of total contributions to the LEC in the summer, accounting for 32.2%, 25.9%, and 24.4%, respectively. The LEC of sea salts did not change much throughout the year and accounted for 4.1–5.3% in Beijing and 4.8–7.4% in Tianjin. According to the Ambient Air Quality Standard, the days were divided into pollutional days (PD) and attained days (AD). The increasing concentrations of AN, AS and OM resulted in an increase in the LEC in the NCP, which led to the occurrences of low visibility events during the autumn and winter. NH4 +, NO3 −, and SO4 2 − mainly existed as fine size particles (diameter < 2.1 μm) in Beijing (73.5%, 80.7%, and 78.0% on PD and 63.3%, 79.4%, and 72.5% on AD, respectively) and Tianjin (81.0%, 80.6%, and 82.1% on PD and 71.5%, 44.3%, and 69.7% on AD, respectively). However, the CA originating mainly from fuel combustion also played an important part in the visibility impairment in the coarse size (2.1 < diameter < 9.0 μm). According to a positive matrix factorization (PMF) model, 37.1% and 26.5% of the LEC came from secondary aerosols on PD in Beijing and in Tianjin, respectively. In addition, biomass burning, fuel combustion and fugitive dust were also important contributing sources of the LEC in the NCP. © 2017 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/108987
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu, 610225, China; Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China; Weather Modification Office of Hebei Province, Shijiazhuang, 050021, China; Tianjin Environmental Meteorology Center, Tianjin, 300074, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
Recommended Citation:
Zou J.,Liu Z.,Hu B.,et al. Aerosol chemical compositions in the North China Plain and the impact on the visibility in Beijing and Tianjin[J]. Atmospheric Research,2018-01-01,201