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Impacts of aerosol compositions on visibility impairment in Xi'an, China
Cao, JJ (Cao, Jun-ji)[1,3]; Wang, QY (Wang, Qi-yuan)[2]; Chow, JC (Chow, Judith C.)[1,4]; Watson, JG (Watson, John G.)[1,4]; Tie, XX (Tie, Xue-xi)[1,5]; Shen, ZX (Shen, Zhen-xing)[2]; Wang, P (Wang, Ping)[1]; An, ZS (An, Zhi-sheng)[1]
2012-11-30
Source PublicationAtmospheric Environment
Volume59Pages:559-566
Subtype期刊论文
Abstract

Daily particle light scattering coefficient, PM2.5 mass and chemical composition were measured in Xi'an from February to December 2009. Visibility was strongly affected by anthropogenic air pollution sources, resulting in an average visual range (VR) of 6.4 ± 4.5 km. The threshold PM2.5 mass concentration, corresponding to VR <10 km, was ∼88 μg m−3. The revised IMPROVE equation was applied to estimate chemical extinction (bext), which on average was ∼15% lower than measured bext. PM2.5 ammonium sulfate was the largest contributor, accounting for ∼40% of bext, followed by organic matter (∼24%), ammonium nitrate (∼23%), and elemental carbon (∼9%), with minor contributions from soil dust (∼3%), and NO2 (∼1%). High secondary inorganic aerosol contributions (i.e., SO42− and NO3−) were the main contributors for VR <5 km. A Positive Matrix Factorization (PMF) solution to the Chemical Mass Balance (CMB) receptor model showed that coal combustion was the dominant factor, accounting for ∼52% of the dry particle light scattering coefficient, followed by the engine exhaust factor (∼31%). Other factors included biomass burning (∼12%) and fugitive dust (∼5%).

KeywordVisibility Impairment Light Extinction Coefficient Chemical Species Source Apportionment
DOI10.1016/j.atmosenv.2012.05.036
Indexed BySCI ; EI
Language英语
Citation statistics
Cited Times:151[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10081
Collection粉尘与环境研究室
Corresponding AuthorCao, JJ (Cao, Jun-ji)[1,3]
Affiliation1.Key Laboratory of Aerosol, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China;
2.Department of Environmental Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China;
3.Institute of Global Environmental Change, Xi’an Jiaotong University, Xi’an 710049, China;
4.Desert Research Institute, Reno, NV, USA;
5.National Center for Atmospheric Research, Boulder, CO, USA
Recommended Citation
GB/T 7714
Cao, JJ ,Wang, QY ,Chow, JC ,et al. Impacts of aerosol compositions on visibility impairment in Xi'an, China[J]. Atmospheric Environment,2012,59:559-566.
APA Cao, JJ .,Wang, QY .,Chow, JC .,Watson, JG .,Tie, XX .,...&An, ZS .(2012).Impacts of aerosol compositions on visibility impairment in Xi'an, China.Atmospheric Environment,59,559-566.
MLA Cao, JJ ,et al."Impacts of aerosol compositions on visibility impairment in Xi'an, China".Atmospheric Environment 59(2012):559-566.
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