DOI: 10.1016/j.atmosenv.2017.08.031
Scopus记录号: 2-s2.0-85027531895
论文题名: Source regions and transport pathways of PM2.5 at a regional background site in East China
作者: Zhang Y ; , Zhang H ; , Deng J ; , Du W ; , Hong Y ; , Xu L ; , Qiu Y ; , Hong Z ; , Wu X ; , Ma Q ; , Yao J ; , Chen J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 167 起始页码: 202
结束页码: 211
语种: 英语
英文关键词: Carbonaceous components
; Lin'an
; PM2.5
; Potential source contribution function
; Transport pathway
; Water-soluble inorganic ion
Scopus关键词: Aerosols
; Atmospheric movements
; Ions
; Organic carbon
; River pollution
; Carbonaceous components
; Inorganic ions
; Lin'an
; PM2.5
; Potential source contribution function
; Transport pathways
; Particles (particulate matter)
; elemental carbon
; ion
; organic carbon
; unclassified drug
; aerosol
; air mass
; atmospheric transport
; concentration (composition)
; elemental carbon
; ion
; organic carbon
; particulate matter
; seasonal variation
; trajectory
; acid deposition
; acidity
; aerosol
; air pollutant
; air sampling
; Article
; autumn
; China
; cluster analysis
; latitude
; longitude
; oxidation
; particulate matter
; priority journal
; seashore
; seasonal variation
; secondary organic aerosol
; solar radiation
; summer
; winter
; China
; Linan
; Yangtze Delta
; Zhejiang
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: PM2.5 samples were collected daily at the Lin'an regional background station (LA) in Zhejiang, China during 2014–2015 and the major chemical components including organic carbon (OC), elemental carbon (EC) and water-soluble inorganic ions (WSII) were determined. Backward trajectory clustering and potential source contribution function (PSCF) were adopted for identifying the transport pathways and potential source regions of PM2.5 at LA. The annual mean concentration was 68.9 ± 28.3 μg m−3, indicating severe pollution in East China. Obvious seasonal variations were found, with highest level in winter and lowest in summer. Carbonaceous aerosols and WSII were the predominant compositions, accounting for 30.7% and 53.5% of PM2.5, respectively. Secondary inorganic ions (SO4 2−, NO3 −, and NH4 +) made a total contribution of 45.2% to PM2.5. Heterogeneous formation played a dominant role in SO4 2− formation and NH4 + formation promoted NO3 − formation. Stationary sources played a more important role than mobile sources based on NO3 −/SO4 2− ratio of 0.53. Aerosol environment at LA was ammonium-poor and SO4 2− was only neutralized sufficiently by NH4 + with the predominant production of (NH4)2SO4 in winter. Four major transport pathways of air masses at LA were found based on trajectory clustering. Air masses from the northwest Gobi areas passing over the heavily polluted regions in North and Central China had the highest levels of PM2.5, followed by the air masses from Central China. PSCF results suggested that surrounding areas in the Yangtze River Delta region were major regional origins of PM2.5 and its major components. Northern region was an important origin for carbonaceous components, and southwestern region was significant for secondary inorganic ions. This study helps understand PM2.5 characteristics, identify potential source regions and effectively control PM2.5 in East China. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82475
Appears in Collections: 气候变化事实与影响
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作者单位: Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China; Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China; University of Chinese Academy of Sciences, Beijing, China; Department of Civil and Environmental Engineering, Louisiana State University, Baton Rouge, LA, United States; Lin'an Regional Atmosphere Background Station, Lin'an, China
Recommended Citation:
Zhang Y,, Zhang H,, Deng J,et al. Source regions and transport pathways of PM2.5 at a regional background site in East China[J]. Atmospheric Environment,2017-01-01,167