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 |
DOI | 10.1016/j.atmosres.2013.08.015 |
收录类别 | SCI |
语种 | 英语 |
引用统计 | |
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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