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Reconstructed Light Extinction Coefficients Using Chemical Compositions of PM2.5 in Winter in Urban Guangzhou, China
Tao, J (Tao Jun)[1,2]; Cao, JJ (Cao Jun-Ji)[3]; Zhang, RJ (Zhang Ren-Jian)[4]; Zhu, LH (Zhu Lihua)[2]; Zhang, T (Zhang Tao)[2]; Shi, S (Shi Si)[1]; Chan, CY (Chan Chuen-Yu)[1]
2012-03-30
Source PublicationADVANCES IN ATMOSPHERIC SCIENCES
Volume29Issue:2Pages:359-368
Subtype期刊论文
Abstract

The objective of this study was to reconstruct light extinction coefficients (b(ext)) according to chemical composition components of particulate matter up to 2.5 mu m in size (PM2.5). PM2.5 samples were collected at the monitoring station of the South China of institute of Environmental Science (SCIES, Guangzhou, China) during January 2010, and the online absorbing and scattering coefficients were obtained using an aethalometer and a nephelometer. The measured values of light absorption coefficient by particle (b(ap)) and light scattering coefficient by particle (b(sp)) significantly correlated (R-2 > 0.95) with values of b(ap) and b(sp) that were reconstructed using the Interagency Monitoring of Protected Visual Environments (IMPROVE) formula when RH was <70%. The measured b(ext) had a good correlation (R-2 > 0.83) with the calculated bext under ambient RH conditions. The result of source apportionment of bext showed that ammonium sulfate [(NH4)(2)SO4] was the largest contributor (35.0%) to b(ext), followed by ammonium nitrate (NH4NO3, 22.9%), organic matter (16.1%), elemental carbon (11.8%), sea salt (4.7%), and nitrogen dioxide (NO2, 9.6%). To improve visibility in Guangzhou, the effective control of secondary particles like sulfates, nitrates, and ammonia should be given more attention in urban environmental management.

KeywordLight Extinction Coefficients Pm2.5 Aerosol Chemical Species
DOI10.1007/s00376-011-1045-0
Indexed BySCI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10195
Collection粉尘与环境研究室
Corresponding AuthorChan, CY (Chan Chuen-Yu)[1]
Affiliation1.School of Environmental Science and Engineering of Sun Yat-Sen University, Guangzhou 510275;
2.South China Institute of Environmental Sciences, Guangzhou 510655;
3.Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075;
4.Key Laboratory of Regional Climate-Environment for Temperate East Asia,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029
Recommended Citation
GB/T 7714
Tao, J ,Cao, JJ ,Zhang, RJ ,et al. Reconstructed Light Extinction Coefficients Using Chemical Compositions of PM2.5 in Winter in Urban Guangzhou, China[J]. ADVANCES IN ATMOSPHERIC SCIENCES,2012,29(2):359-368.
APA Tao, J .,Cao, JJ .,Zhang, RJ .,Zhu, LH .,Zhang, T .,...&Chan, CY .(2012).Reconstructed Light Extinction Coefficients Using Chemical Compositions of PM2.5 in Winter in Urban Guangzhou, China.ADVANCES IN ATMOSPHERIC SCIENCES,29(2),359-368.
MLA Tao, J ,et al."Reconstructed Light Extinction Coefficients Using Chemical Compositions of PM2.5 in Winter in Urban Guangzhou, China".ADVANCES IN ATMOSPHERIC SCIENCES 29.2(2012):359-368.
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