PM2.5 mass, chemical composition, and light extinction before and during the 2008 Beijing Olympics
文献类型：期刊论文
| 作者 | Li, Xinghua1; He, Kebin2; Li, Chengcai3; Yang, Fumo4 ; Zhao, Qing2; Ma, Yongliang2; Cheng, Yuan2; Ouyang, Wenjuan4; Chen, Gangcai5
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| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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| 出版日期 | 2013-11-16 |
| 卷号 | 118期号:21页码:12158-12167 |
| ISSN号 | 2169-897X |
| DOI | 10.1002/2013JD020106 |
| 通讯作者 | Yang, FM (reprint author), Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Key Lab Reservoir Aquat Environm, Chongqing 401122, Peoples R China. |
| 英文摘要 | Distinct contrast of air quality and visibility before and during the 2008 Beijing Olympic Games provides a rare opportunity to investigate the links between PM2.5 mass, chemical composition, and light extinction in this megacity. Twenty-four hour integrated PM2.5 samples were collected, and light scattering coefficients and the concentrations of black carbon were measured at urban Beijing for this purpose during a measurement campaign from 1 July to 20 September 2008, which was classed into four stages according to the levels of emission control measures. Daily PM2.5 concentrations ranged from 15.9 to 156.7 mu g m(-3) with an average of 66.0 +/- 35.1 mu g m(-3). The average PM2.5 mass during the Olympics decreased by 49% from the second stage (20 July to 7 August), mainly due to the reduction of secondary inorganic aerosols (i.e., sulfate, nitrate, and ammonium (SNA)). The counterintuitive increase of PM2.5 mass (by 27% on average) during the second stage with two most serious haze episodes, although more rigorous emission control measures were in place, compared to the first stage (1-19 July), was mainly explained by the unfavorable meteorology and input of sulfate aerosols. A daily PM2.5 mass threshold of 50 mu g m(-3) was extracted for frequent haze occurrence. The extinction fractions of SNA and organic material were each approximately 30% during the 20% best visibility days but changed to 81.7% and 8.4%, respectively, during the 20% worst visibility days. The results indicated that the role of SNA was magnified in haze formation during the 2008 summer in Beijing. |
| URL标识 | 查看原文 |
| 资助项目 | National Natural Science Foundation of China (NSFC)[41075093] ; National Natural Science Foundation of China (NSFC)[41375123] ; National Basic Research Program of China[2010CB951803] ; Ministry of Environmental Protection of China[201209007] ; State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| 出版者 | AMER GEOPHYSICAL UNION |
| WOS记录号 | WOS:000330611800018 |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/628]  |
| 专题 | 大气环境研究中心 水质生物转化研究中心 |
| 通讯作者 | Yang, Fumo |
| 作者单位 | 1.Beihang Univ, Sch Chem & Environm, Beijing, Peoples R China 2.Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China 3.Peking Univ, Sch Phys, Beijing 100871, Peoples R China 4.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Key Lab Reservoir Aquat Environm, Chongqing 401122, Peoples R China 5.Chongqing Inst Environm Sci, Chongqing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Xinghua,He, Kebin,Li, Chengcai,et al. PM2.5 mass, chemical composition, and light extinction before and during the 2008 Beijing Olympics[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2013,118(21):12158-12167. |
| APA | Li, Xinghua.,He, Kebin.,Li, Chengcai.,Yang, Fumo.,Zhao, Qing.,...&Chen, Gangcai.(2013).PM2.5 mass, chemical composition, and light extinction before and during the 2008 Beijing Olympics.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,118(21),12158-12167. |
| MLA | Li, Xinghua,et al."PM2.5 mass, chemical composition, and light extinction before and during the 2008 Beijing Olympics".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 118.21(2013):12158-12167. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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