| Characteristics of Carbonaceous Particles in Beijing During Winter and Summer 2003 |
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| 作者姓名： | 于建华 陈添 虞统 刘文清 王欣 |
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| 作者单位： | Beijing Municipal Environmental Monitoring Center, Beijing 100044, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031,Beijing Municipal Environmental Monitoring Center, Beijing 100044,Laboratoire des Sciences du Climat et de l’Environment, France,Laboratoire des Sciences du Climat et de l’Environment, France,Beijing Municipal Environmental Monitoring Center, Beijing 100044,Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031,Beijing Municipal Environmental Monitoring Center, Beijing 100044 |
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| 摘 要： | Campaigns were conducted to measure Organic Carbon (OC) and Elemental Carbon (EC) in PM2.5 during winter and summer 2003 in Beijing. Modest differences of PM2.5 and PM10 mean concentrations were observed between the winter and summer campaigns. The mean PM2.5/PM10 ratio in both seasons was around 60%, indicating PM2.5 contributed significantly to PM10. The mean concentrations of OC and EC in PM2.5 were 11.2±7.5 and 6.0±5.0μg m-3 for the winter campaign, and 9.4±2.1 and 4.3±3.0 μg m-3 for the summer campaign, respectively. Diurnal concentrations of OC and EC in PM2.5 were found high at night and low during the daytime in winter, and characterized by an obvious minimum in the summer afternoon. The mean OC/EC ratio was 1.87±0.09 for winter and Z39±0.49 for summer. The higher OC/EC ratio in summer indicates some formation of Secondary Organic Carbon (SOC). The estimated SOC was 2.8 μg m-3 for winter and 4.2μg m-3 for summer.
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| 关 键 词： | 碳元素 有机碳 北京 冬季 夏季 气溶胶 大气污染 |
| 收稿时间： | 2005-04-15 |
| 修稿时间： | 2005-09-13 |
Characteristics of carbonaceous particles in Beijing during winter and summer 2003 |
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| Jianhua Yu,Tian Chen,Guinot Benjamin,Cachier Helene,Tong Yu,Wenqing Liu,Xin Wang.Characteristics of Carbonaceous Particles in Beijing During Winter and Summer 2003[J].Advances in Atmospheric Sciences,2006,23(3):468-473. |
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| Authors: | Jianhua Yu Tian Chen Guinot Benjamin Cachier Helene Tong Yu Wenqing Liu Xin Wang |
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| Institution: | (1) Beijing Municipal Environmental Monitoring Center, Beijing, 100044, China;(2) Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, 230031, China;(3) Laboratoire des Sciences du Climat et de l’Environment, France |
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| Abstract: | Campaigns were conducted to measure Organic Carbon (OC) and Elemental Carbon (EC) in PM2.5 during winter and summer 2003 in Beijing. Modest differences of PM2.5 and PM10 mean concentrations were observed between the winter and summer campaigns. The mean PM2.5/PM10 ratio in both seasons was around 60%, indicating PM2.5 contributed significantly to PM10. The mean concentrations of OC and EC in PM2.5 were 11.2±7.5 and 6.0±5.0 μg m−3 for the winter campaign, and 9.4±2.1 and 4.3±3.0 μg m−3 for the summer campaign, respectively. Diurnal concentrations of OC and EC in PM2.5 were found high at night and low during the daytime in winter, and characterized by an obvious minimum in the summer afternoon.
The mean OC/EC ratio was 1.87±0.09 for winter and 2.39±0.19 for summer. The higher OC/EC ratio in summer indicates some formation
of Secondary Organic Carbon (SOC). The estimated SOC was 2.8 μg m−3 for winter and 4.2 μg m−3 for summer. |
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| Keywords: | elemental carbon organic carbon PM2 5 PM10 secondary organic carbon |
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