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PM2.5 Chemical Compositions and Aerosol Optical Properties in Beijing during the Late Fall
Wang, Huanbo1; Li, Xinghua2; Shi, Guangming1; Cao, Junji3; Li, Chengcai4; Yang, Fumo1; Ma, Yongliang5; He, Kebin5
2015-02-01
Source PublicationATMOSPHERE
ISSN2073-4433
Volume6Issue:2Pages:164-182
SubtypeArticle
Abstract

Daily PM2.5 mass concentrations and chemical compositions together with the aerosol optical properties were measured from 8-28 November 2011 in Beijing. PM2.5 mass concentration varied from 15.6-237.5 mu g center dot m(-3) and showed a mean value of 111.2 +/- 73.4 mu g center dot m(-3). Organic matter, NH4NO3 and (NH4)(2)SO4 were the major constituents of PM2.5, accounting for 39.4%, 15.4%, and 14.9% of the total mass, respectively, while fine soil, chloride salt, and elemental carbon together accounted for 27.7%. Daily scattering and absorption coefficients (sigma(sc) and sigma(ap)) were in the range of 31.1-667 Mm(-1) and 8.24-158.0 Mm(-1), with mean values of 270 +/- 200 Mm(-1) and 74.3 +/- 43.4 Mm(-1). Significant increases in sigma(sc) and sigma(ap) were observed during the pollution accumulation episodes. The revised IMPROVE algorithm was applied to estimate the extinction coefficient (b(ext)). On average, organic matter was the largest contributor, accounting for 44.6% of b(ext), while (NH4)(2)SO4, NH4NO3, elemental carbon, and fine soil accounted for 16.3% 18.0%, 18.6%, and 2.34% of b(ext), respectively. Nevertheless, the contributions of (NH4)(2)SO4 and NH4NO3 were significantly higher during the heavy pollution periods than those on clean days. Typical pollution episodes were also explored, and it has been characterized that secondary formation of inorganic compounds is more important than carbonaceous pollution for visibility impairment in Beijing.

WOS HeadingsScience & Technology ; Physical Sciences
DOI10.3390/atmos6020164
WOS KeywordAtmospheric Aerosol ; Particulate Matter ; Light Extinction ; Air-pollution ; China ; Carbon ; Shanghai ; Urban ; Temperature ; Variability
Indexed BySCI
Language英语
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
WOS IDWOS:000350691700001
PublisherMDPI AG
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9390
Collection粉尘与环境研究室
Corresponding AuthorYang, Fumo
Affiliation1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Key Lab Reservoir Aquat Environm, Chongqing 400714, Peoples R China
2.Beihang Univ, Sch Chem & Environm, Beijing 100191, Peoples R China
3.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710075, Peoples R China
4.Peking Univ, Sch Phys, Beijing 100871, Peoples R China
5.Tsinghua Univ, Sch Environm, State Environm Protect Key Lab Sources & Control, Beijing 100084, Peoples R China
Recommended Citation
GB/T 7714
Wang, Huanbo,Li, Xinghua,Shi, Guangming,et al. PM2.5 Chemical Compositions and Aerosol Optical Properties in Beijing during the Late Fall[J]. ATMOSPHERE,2015,6(2):164-182.
APA Wang, Huanbo.,Li, Xinghua.,Shi, Guangming.,Cao, Junji.,Li, Chengcai.,...&He, Kebin.(2015).PM2.5 Chemical Compositions and Aerosol Optical Properties in Beijing during the Late Fall.ATMOSPHERE,6(2),164-182.
MLA Wang, Huanbo,et al."PM2.5 Chemical Compositions and Aerosol Optical Properties in Beijing during the Late Fall".ATMOSPHERE 6.2(2015):164-182.
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