DOI: 10.1016/j.atmosenv.2013.10.055
Scopus记录号: 2-s2.0-84888090414
论文题名: Chemical compositions and reconstructed light extinction coefficients of particulate matter in a mega-city in the western Yangtze River Delta, China
作者: Shen G ; , Xue M ; , Yuan S ; , Zhang J ; , Zhao Q ; , Li B ; , Wu H ; , Ding A
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 83 起始页码: 14
结束页码: 20
语种: 英语
英文关键词: Backward air trajectory
; Chemical composition
; Deciview index
; Reconstructed light extinction coefficient
; Western YRD region
Scopus关键词: Biogeochemistry
; Biological materials
; Carbon
; Light extinction
; Organic compounds
; Particulate emissions
; River pollution
; Air trajectories
; Chemical compositions
; Deciview
; Light extinction coefficients
; Western YRD region
; Loading
; ammonium nitrate
; ammonium sulfate
; carbon
; element
; ion
; organic carbon
; organic matter
; aerosol composition
; air mass
; atmospheric plume
; atmospheric pollution
; extinction coefficient
; megacity
; particulate matter
; reconstruction
; seasonality
; trajectory
; air
; article
; chemical composition
; China
; city
; geological time
; light absorption
; light extinction coefficient
; light related phenomena
; particulate matter
; plum
; priority journal
; spring
; summer
; visibility
; China
; Jiangsu
; Nanjing [Jiangsu]
; Yangtze Delta
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Ambient particulate matter was collected in a megacity, Nanjing in western YRD during the spring and summer periods. Chemical compositions of fine PM including organic carbon, elemental carbon, elements and water soluble ions were analyzed. The light extinction coefficients were reconstructed following the IMPROVE formula. Organic matter was the most abundant composition in PM2.5 (20-25% of total mass), followed by the inorganic ions. During the spring time, geological materials contributed 25% of the total PM2.5. Estimated light extinction coefficient ranged from 133 to 560Mm-1 with the deciview haze index value of 26-40dv, indicating strong light extinction by PM and subsequently low visibility in the city. Reconstructed ammonium sulfate, ammonium nitrate, organic matter and light absorption carbon in fine PM contributed significantly (37±10, 16±6, 15±4 and 10±3%, respectively) to the total light extinction of PM, while soil (5-7%) and sea salt fractions (2-4%) in fine PM and coarse PM (6-11%) had relatively minor influences. The results of backward air trajectory showed that the site was strongly influenced by the air from the eastern (39%) and southeastern (29%) areas during the sampling period. Air plumes from the Southeastern had both high PM mass pollution and large light extinction, while the air mass originating from the Northwestern resulted in high PM mass loading but relatively lower light extinction. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80822
Appears in Collections: 气候变化事实与影响
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作者单位: Jiangsu Key Laboratory of Environmental Engineering, Jiangsu Academy of Environmental Sciences, Nanjing 210036, China; Institute for Climate and Global Change Research, School of Atmospheric Sciences, Nanjing University, Nanjing 210093, China
Recommended Citation:
Shen G,, Xue M,, Yuan S,et al. Chemical compositions and reconstructed light extinction coefficients of particulate matter in a mega-city in the western Yangtze River Delta, China[J]. Atmospheric Environment,2014-01-01,83