Ambient organic carbon to elemental carbon ratios: Influences of the   measurement methods and implications

doi:10.1016/j.atmosenv.2011.01.064

CORC > 北京大学 > 环境科学与工程学院

	Ambient organic carbon to elemental carbon ratios: Influences of the measurement methods and implications
	Cheng, Yuan ; He, Ke-bin ; Duan, Feng-kui ; Zheng, Mei ; Du, Zhen-yu ; Ma, Yong-liang ; Tan, Ji-hua
刊名	大气环境
	2011
关键词	Positive artifact Thermal-optical reflectance Thermal-optical transmittance Secondary organic aerosol Water-soluble organic carbon SOUTHEASTERN UNITED-STATES FINE PARTICULATE MATTER LIGHT-ABSORPTION BLACK CARBON ATMOSPHERIC AEROSOLS SOURCE APPORTIONMENT SAMPLING ARTIFACTS COMBUSTION CLIMATE CHINA
DOI	10.1016/j.atmosenv.2011.01.064
英文摘要	Ambient organic carbon (OC) to elemental carbon (EC) ratios include important information about the extent of secondary organic aerosol (SOA) production. Influences of the measurement methods on the OC to EC ratios were evaluated in Beijing. When analyzed by the IMPROVE-A temperature protocol, the presence of positive artifact would increase the OC to EC ratio by 14-36% based on the transmittance correction, whereas the ratio of the un-denuded filter was 1.12-1.31 times that of denuded filter when using the reflectance correction. The OC to EC ratios calculated by results from the transmittance correction showed more significant variation comparing with those based on the reflectance correction; and no correlation between them was found. SOA concentrations were predicted by the EC-tracer method to investigate effects of the charring correction methods. Estimated SOA based on the reflectance correction was found to be much lower comparing with that calculated by results from the transmittance correction. SOA based on the reflectance correction might be unreliable because it exhibited no correlation with water-soluble organic carbon (WSOC). On the other hand, WSOC and SOA based on the transmittance correction correlated well (R-2 = 0.77-0.94), indicating the secondary nature of WSOC in Beijing. (C) 2011 Elsevier Ltd. All rights reserved.; Environmental Sciences; Meteorology & Atmospheric Sciences; SCI(E); EI; 0; ARTICLE; 12; 2060-2066; 45
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/240287]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Cheng, Yuan,He, Ke-bin,Duan, Feng-kui,et al. Ambient organic carbon to elemental carbon ratios: Influences of the measurement methods and implications[J]. 大气环境,2011.
APA	Cheng, Yuan.,He, Ke-bin.,Duan, Feng-kui.,Zheng, Mei.,Du, Zhen-yu.,...&Tan, Ji-hua.(2011).Ambient organic carbon to elemental carbon ratios: Influences of the measurement methods and implications.大气环境.
MLA	Cheng, Yuan,et al."Ambient organic carbon to elemental carbon ratios: Influences of the measurement methods and implications".大气环境 (2011).