%0 Journal Article
%T Characteristics of Carbonaceous Particles in Beijing During Winter and Summer 2003
%A YU Jianhu
%A CHEN Tian
%A Benjamin GUINOT
%A Helene CACHIER
%A YU Tong
%A LIU Wenqing
%A WANG Xin
%A <br>YU Jianhu
%A CHEN Tian
%A Benjamin GUINOT
%A Helene CACHIER
%A YU Tong
%A LIU Wenqing
%A WANG Xin
%J 大气科学进展
%D 2006
%I 
%X 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.
%K elemental carbon
%K organic carbon
%K PM2
%K 5
%K PM10
%K secondary organic carbon<br>碳元素
%K 有机碳
%K 北京
%K 冬季
%K 夏季
%K 气溶胶
%K 大气污染
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=28A2F569B2458C17&jid=5434AFBF6CB6E7E8D67733B541F211C7&aid=A461E35712D832DC742EB4BF5A93F9C3&yid=37904DC365DD7266&vid=EA389574707BDED3&iid=38B194292C032A66&sid=3FC4D669D19FF0C6&eid=8143FF92EEF26F96&journal_id=0256-1530&journal_name=大气科学进展&referenced_num=2&reference_num=23