Impacts of aerosol compositions on visibility impairment in Xi'an, China | |
Wang, P (Wang, Ping)[1]; An, ZS (An, Zhi-sheng)[1]; Watson, JG (Watson, John G.)[1,4]; Tie, XX (Tie, Xue-xi)[1,5]; Shen, ZX (Shen, Zhen-xing)[2]; Cao, JJ (Cao, Jun-ji)[1,3]; Wang, QY (Wang, Qi-yuan)[2]; Chow, JC (Chow, Judith C.)[1,4] | |
刊名 | Atmospheric Environment |
2012-11-30 | |
卷号 | 59页码:559-566 |
关键词 | Visibility Impairment Light Extinction Coefficient Chemical Species Source Apportionment |
DOI | 10.1016/j.atmosenv.2012.05.036 |
文献子类 | 期刊论文 |
英文摘要 | 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%). |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.ieecas.cn/handle/361006/10081] |
专题 | 地球环境研究所_粉尘与环境研究室 |
通讯作者 | Cao, JJ (Cao, Jun-ji)[1,3] |
作者单位 | 1.Institute of Global Environmental Change, Xi’an Jiaotong University, Xi’an 710049, China; 2.National Center for Atmospheric Research, Boulder, CO, USA 3.Key Laboratory of Aerosol, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China; 4.Department of Environmental Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China; 5.Desert Research Institute, Reno, NV, USA; |
推荐引用方式 GB/T 7714 | Wang, P ,An, ZS ,Watson, JG ,et al. Impacts of aerosol compositions on visibility impairment in Xi'an, China[J]. Atmospheric Environment,2012,59:559-566. |
APA | Wang, P .,An, ZS .,Watson, JG .,Tie, XX .,Shen, ZX .,...&Chow, JC .(2012).Impacts of aerosol compositions on visibility impairment in Xi'an, China.Atmospheric Environment,59,559-566. |
MLA | Wang, P ,et al."Impacts of aerosol compositions on visibility impairment in Xi'an, China".Atmospheric Environment 59(2012):559-566. |
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