Estimate of initial isoprene contribution to ozone formation potential   in Beijing, China

doi:10.1016/j.atmosenv.2008.03.035

CORC > 北京大学 > 环境科学与工程学院

	Estimate of initial isoprene contribution to ozone formation potential in Beijing, China
	Xie, Xin ; Shao, Min ; Liu, Ying ; Lu, Sihua ; Chang, Chih-Chung ; Chen, Zhong-Ming
刊名	大气环境
	2008
关键词	initial isoprene chemical loss MIR VOCs VOLATILE ORGANIC-COMPOUNDS SOUTHERN TAIWAN BIOGENIC HYDROCARBONS COMPOUND EMISSIONS AIR-QUALITY URBAN VALIDATION STRATEGIES REACTIVITY ATMOSPHERE
DOI	10.1016/j.atmosenv.2008.03.035
英文摘要	Volatile organic compounds (VOCs) are important precursors of tropospheric ozone formation. Isoprene contributions to ozone formation by using ambient mixing ratios are generally underestimated because of rapid chemical losses. In this study, ambient mixing ratios of major VOC species were continuously measured at Peking university (PKU) and YUFA, urban and sub-urban sites in Beijing, the city that will host 2008 Olympic Games. The observed mixing ratios of methyl vinyl ketone (MVK), methacrolein (MACR) and isoprene were used to derive the mixing ratios of initial isoprene, which means the ambient isoprene level before it undergoes any photochemical reaction with OH radicals. The average mixing ratios of initial isoprene were 3.3 +/- 1.6 and 2.9 +/- 1.5 ppbv at PKU and YUFA sites, respectively. The percentages of initial isoprene in total initial VOCs were 10.8% at PKU site and 11.4% at YUFA site, in reasonable agreement with the isoprene Contribution in total VOC emissions as derived from source inventories. Maximum increment reactivity (MIR) was used to evaluate the ozone formation potential (OFP) for major VOC species. The OFP for initial isoprene accounted for 23% of the total OFPs for all measured species, compared to 11% using ambient mixing ratios of isoprene at PKU site. Similarly, at YUFA site, the ambient measured isoprene and initial isoprene contributed 10% and 22%, respectively, to the OFPs for total measured VOCs. It seems that isoprene has similar contribution to ozone formation at both sites in Beijing city. (C) 2008 Elsevier Ltd. All rights reserved.; Environmental Sciences; Meteorology & Atmospheric Sciences; SCI(E); EI; 42; ARTICLE; 24; 6000-6010; 42
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/158682]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Xie, Xin,Shao, Min,Liu, Ying,et al. Estimate of initial isoprene contribution to ozone formation potential in Beijing, China[J]. 大气环境,2008.
APA	Xie, Xin,Shao, Min,Liu, Ying,Lu, Sihua,Chang, Chih-Chung,&Chen, Zhong-Ming.(2008).Estimate of initial isoprene contribution to ozone formation potential in Beijing, China.大气环境.
MLA	Xie, Xin,et al."Estimate of initial isoprene contribution to ozone formation potential in Beijing, China".大气环境 (2008).