Seasonal and diurnal variations of organic carbon in PM2.5 in Beijing   and the estimation of secondary organic carbon

doi:10.1029/2008JD010902

CORC > 北京大学 > 环境科学与工程学院

	Seasonal and diurnal variations of organic carbon in PM2.5 in Beijing and the estimation of secondary organic carbon
	Lin, Peng ; Hu, Min ; Deng, Z. ; Slanina, J. ; Han, S. ; Kondo, Y. ; Takegawa, N. ; Miyazaki, Y. ; Zhao, Y. ; Sugimoto, N.
刊名	journal of geophysical research atmospheres
	2009
关键词	ELEMENTAL CARBON AIR-QUALITY LOS-ANGELES PARTICULATE CARBON COAL COMBUSTION FINE PARTICLES UNITED-STATES AEROSOL CHINA SUPERSITE
DOI	10.1029/2008JD010902
英文摘要	Organic carbon (OC) and elemental carbon (EC) in PM2.5 were measured hourly with a semicontinuous thermal-optical analyzer in Beijing, China, during four seasons from November 2005 to October 2006. The average OC concentrations measured at Peking University (PKU) site in urban Beijing were 20 +/- 19, 12 +/- 7, 10 +/- 5, and 18 +/- 11 mu gC/m(3) in winter, spring, summer, and autumn, respectively. Distinct seasonal and diurnal patterns of OC were observed, and their concentrations were significantly influenced by the seasonal and diurnal changes in sources, emission rates, and mesoscale meteorology. The impacts of meteorological parameters such as wind and precipitation on OC and EC concentrations are also discussed. OC and EC concentrations were found to be well correlated in winter, spring, and autumn, indicating their common origins, while their correlation was poorer in summer, especially in the afternoon, indicating that the influence of secondary organic carbon (SOC) was significant for this period. SOC concentrations were estimated by using the EC-tracer method as about 2.6 +/- 3.1, 2.8 +/- 2.4, 4.5 +/- 2.9, and 4.1 +/- 4.0 mu gC/m(3), accounting for 19%, 27%, 45%, and 23% of total organic carbon in winter, spring, summer, and autumn, respectively. This result showed that the relative contribution of SOC to OC in PM2.5 at this urban location was only comparable to that of primary organic carbon (POC) to OC in summer, while in the other three seasons, OC was dominated by POC.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000266742600002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Meteorology & Atmospheric Sciences; SCI(E); 48; ARTICLE; 114
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/324493]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Lin, Peng,Hu, Min,Deng, Z.,et al. Seasonal and diurnal variations of organic carbon in PM2.5 in Beijing and the estimation of secondary organic carbon[J]. journal of geophysical research atmospheres,2009.
APA	Lin, Peng.,Hu, Min.,Deng, Z..,Slanina, J..,Han, S..,...&Sugimoto, N..(2009).Seasonal and diurnal variations of organic carbon in PM2.5 in Beijing and the estimation of secondary organic carbon.journal of geophysical research atmospheres.
MLA	Lin, Peng,et al."Seasonal and diurnal variations of organic carbon in PM2.5 in Beijing and the estimation of secondary organic carbon".journal of geophysical research atmospheres (2009).