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Impact of PM2.5 chemical compositions on aerosol lightscattering in Guangzhou — the largest megacity in South China
Tao,J(Tao,Jun)[1,2]; Zhang,LM(Zhang,Leiming)[2,3]; Ho,KF(Ho,Kinfai)[4]; Zhang,RJ(Zhang,Renjian)[2]; Lin,ZJ(Lin,Zejian)[1]; Zhang,ZS(Zhang,Zhisheng)[1]; Lin,M(Lin,Mang)[1]; Cao,JJ(Cao,Junji)[5]; Liu,SX(Liu,Suixin)[5]; Wang,GH(Wang,Gehui)[5]
2014
发表期刊Atmospheric Research
卷号135-136页码:48-58
文章类型期刊论文
摘要

Daily PM2.5 samples were collected in Guangzhou — the largest megacity in South China, for a period of one month in each season during 2009–2010. Mass concentrations of water-soluble inorganic ions, organic carbon (OC) and elemental carbon (EC) in PM2.5 were determined, and aerosol scattering coefficient (bsp) was synchronously measured. The daily PM2.5 mass concentrations ranged from 21.0 to 213.6 μg m−3 with an annual average of 76.8 ± 41.5 μg m−3. The highest seasonal average PM2.5 was observed in winter (103.3 ± 50.1 μg m−3) and the lowest in summer (38.6 ± 15.7 μg m−3). Annual average PM2.5 mass scattering efficiency (MSE) was 3.5 ± 0.9 m2 g−1, with obvious seasonal variations in sequence of autumn (4.5 ± 0.2 m2 g−1) N winter (3.9 ± 0.5 m2 g−1) N spring (3.0 ± 0.4 m2 g−1) N summer (2.3 ± 0.3 m2 g−1). To determine the relationship between bsp and the chemical components of PM2.5, bsp was reconstructed in each season using the original IMPROVE formula with a modification of including sea salt aerosols. The estimated bsp using this method was 22 ± 28% smaller on annual average compared to the measurements. Multiple linear regression of measured bsp against (NH4)2SO4, NH4NO3, OM (Organic Mass), SS (Sea Salt), FS (Fine Soil), and CM (Coarse Mass) were also performed in all the four seasons. The estimated bsp from using the regression equation was 4 ± 12% larger than the measured values. On average, (NH4)2SO4, NH4NO3, OM, SS, FS and CM accounted for 50 ± 11%, 18 ± 10%, 19 ± 5%, 5 ± 4%, 3 ± 2% and 5 ± 6%, respectively, of the estimated bsp.

关键词Pm2.5 Aerosol Chemical Composition Aerosol Scattering Coefficient Urban Aerosols
DOI10.1016/j.atmosres.2013.08.015
收录类别SCI
语种英语
引用统计
被引频次:102[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/9867
专题粉尘与环境研究室
通讯作者Ho,KF(Ho,Kinfai)[4]; Zhang,RJ(Zhang,Renjian)[2]
作者单位1.South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou, China;
2.RCE-TEA, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China;
3.Air Quality Research Division, Science Technology Branch, Environment Canada, Toronto, Canada;
4.School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China;
5.Key Laboratory of Aerosol, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China
推荐引用方式
GB/T 7714
Tao,J(Tao,Jun)[1,2],Zhang,LM(Zhang,Leiming)[2,3],Ho,KF(Ho,Kinfai)[4],等. Impact of PM2.5 chemical compositions on aerosol lightscattering in Guangzhou — the largest megacity in South China[J]. Atmospheric Research,2014,135-136:48-58.
APA Tao,J.,Zhang,LM.,Ho,KF.,Zhang,RJ.,Lin,ZJ.,...&Wang,GH.(2014).Impact of PM2.5 chemical compositions on aerosol lightscattering in Guangzhou — the largest megacity in South China.Atmospheric Research,135-136,48-58.
MLA Tao,J,et al."Impact of PM2.5 chemical compositions on aerosol lightscattering in Guangzhou — the largest megacity in South China".Atmospheric Research 135-136(2014):48-58.
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