IEECAS OpenIR  > 粉尘与环境研究室
Characterization and source apportionment of aerosol light extinction in Chengdu, southwest China
Tao, J (Tao, Jun)[ 1,2 ]; Zhang, LM (Zhang, Leiming)[ 3 ]; Cao, JJ (Cao, Junji)[ 2 ]; Hsu, SC (Hsu, Shih-Chieh)[ 4 ]; Xia, XG (Xia, Xiangao)[ 5 ]; Zhang, ZS (Zhang, Zhisheng)[ 1 ]; Lin, ZJ (Lin, Zejian)[ 1 ]; Cheng, TT (Cheng, Tiantao)[ 6 ]; Zhang, RJ (Zhang, Renjian)[ 7 ]
2014-10-01
Source PublicationATMOSPHERIC ENVIRONMENT
Volume95Pages:552-562
Subtype期刊论文
Abstract

To investigate aerosol properties in the Sichuan Basin of China, field aerosol sampling was carried out in Chengdu, China during four one-month periods, each in a different season in 2011. Aerosol scattering coefficient (b(sp)) at dry (RH<40%) and wet (40% < RH<90%) conditions and aerosol absorption coefficient (b(ap)) were measured. Additionally, daily PM2.5 and PM10 samples were also collected. PM2.5 samples were subject to chemical analysis for various chemical components including major water-soluble ions, organic and elemental carbon (OC and EC), trace elements, as well as anhydrosugar Levoglucosan (LG) and Mannosan (MN). A multiple linear regression analysis was applied to the measured dry b(sp) against (NH4)(2)SO4, NH4NO3, organic mass (OM), fine soil (FS), and coarse mass (CM, PM2.5-10), and to the measured b(ap) against EC in all the four seasons to evaluate the impact of individual chemical components of PM2.5 and CM on aerosol light extinction (b(ext) = b(sp) + b(ap)). Mass scattering efficiency (MSE) and mass absorption efficiency (MAE) of the individual chemical components of PM2.5 were estimated based on seasonal regression equations and were then used for estimating b(ext). The annual b(sp), b(ap) and single scattering albedo (SSA) at dry conditions were 456 +/- 237 Mm(-1), 96 +/- 48 Mm(-1) and 0.82 +/- 0.05, respectively. The annual average b(sp) at ambient conditions estimated through hygroscopic curve of aerosol (f(RH)) was 763 +/- 415 Mm(-1), which was 1.7 times of the dry b(sp). The annual average SSA at ambient conditions also increased to 0.88 +/- 0.04. The estimated dry b(ext) was only 2 +/- 9% higher than the measurements and the estimated ambient bext from individual chemical components was only 1 +/- 10% lower, on an annual basis, than that estimated from using f(RH). Secondary inorganic aerosols, coal combustion, biomass burning, iron and steel industry, Mo-related industry, soil dust, and CM to b(ext) were estimated to account for 41 +/- 19%, 18 +/- 12%, 14 +/- 13%, 13 +/- 11%, 5 +/- 4%, 5 +/- 7% and 4 +/- 3%, respectively, of the estimated ambient b(ext).

KeywordAerosol Scattering Coefficient Aerosol Absorption Coefficient Hygroscopic Growth Urban Aerosols
DOI10.1016/j.atmosenv.2014.07.017
Indexed BySCI ; EI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9791
Collection粉尘与环境研究室
Corresponding AuthorTao, J (Tao, Jun)[ 1,2 ]
Affiliation1.South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou, China;
2.Key Laboratory of Aerosol, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China;
3.Air Quality Research Division, Science Technology Branch, Environment Canada, Toronto, Canada;
4.Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan;
5.LAGEO, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China;
6.Department of Environmental Science and Engineering, Fudan University, Shanghai, China;
7.TEA, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
Recommended Citation
GB/T 7714
Tao, J ,Zhang, LM ,Cao, JJ ,et al. Characterization and source apportionment of aerosol light extinction in Chengdu, southwest China[J]. ATMOSPHERIC ENVIRONMENT,2014,95:552-562.
APA Tao, J .,Zhang, LM .,Cao, JJ .,Hsu, SC .,Xia, XG .,...&Zhang, RJ .(2014).Characterization and source apportionment of aerosol light extinction in Chengdu, southwest China.ATMOSPHERIC ENVIRONMENT,95,552-562.
MLA Tao, J ,et al."Characterization and source apportionment of aerosol light extinction in Chengdu, southwest China".ATMOSPHERIC ENVIRONMENT 95(2014):552-562.
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