Volatile organic compounds measured in summer in Beijing and their role   in ground-level ozone formation

doi:10.1029/2008JD010863

CORC > 北京大学 > 环境科学与工程学院

	Volatile organic compounds measured in summer in Beijing and their role in ground-level ozone formation
	Shao, Min ; Lu, Sihua ; Liu, Ying ; Xie, Xin ; Chang, Chichung ; Huang, Shan ; Chen, Zhongmin
刊名	journal of geophysical research atmospheres
	2009
关键词	PEARL RIVER DELTA SOURCE APPORTIONMENT PHOTOCHEMICAL PRODUCTION HYDROCARBON REACTIVITY SOUTHERN TAIWAN COMPOUNDS VOCS CHINA AIR ATMOSPHERE POLLUTION
DOI	10.1029/2008JD010863
英文摘要	Beijing has long suffered from serious ground-level ozone pollution, and volatile organic compounds (VOCs) play a key role in ozone formation. To understand the chemical speciation of VOCs in Beijing, nonmethane hydrocarbons (NMHCs) and oxygenated VOCs (OVOCs) were measured in summer in Beijing and nearby provinces (VOCs in this work means NMHCs+OVOCs). A variation of VOC mixing ratios and chemical speciation from 2004 to 2006 was observed at an urban site in Beijing. The typical VOC species, e. g., propane, propene, and toluene, had comparable or lower mixing ratios than levels found in other cities that previously hosted the Olympic Games, while the mixing ratios for isoprene were higher. The chemical compositions of VOCs within Beijing were heavily influenced by vehicular emissions and differed from those obtained in Tianjin and Hebei Province. OVOCs were an important component, accounting for 54% and 37% in the VOC mixing ratio in 2005 and 2006, respectively, and about 40% of the OH loss rates. The main reactive VOC compounds were aldehydes and alkenes. By using isoprene chemistry and the ratio of ethylbenzene to mp-xylene, the initial mixing ratios of VOCs were estimated. The VOCs had similar variation patterns to ambient ozone and peroxyacetyl nitrate (PAN) concentrations. The correlation between daily maximum ozone concentrations and initial VOCs revealed that ozone formation was sensitive to VOCs for both urban (Peking University, PKU) and rural (Yufa) sites. A reduction in NOx would lead to a decrease in ozone at Yufa, but would cause increased ozone at the PKU site.; Meteorology & Atmospheric Sciences; SCI(E); 45; ARTICLE; 114
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/158528]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Shao, Min,Lu, Sihua,Liu, Ying,et al. Volatile organic compounds measured in summer in Beijing and their role in ground-level ozone formation[J]. journal of geophysical research atmospheres,2009.
APA	Shao, Min.,Lu, Sihua.,Liu, Ying.,Xie, Xin.,Chang, Chichung.,...&Chen, Zhongmin.(2009).Volatile organic compounds measured in summer in Beijing and their role in ground-level ozone formation.journal of geophysical research atmospheres.
MLA	Shao, Min,et al."Volatile organic compounds measured in summer in Beijing and their role in ground-level ozone formation".journal of geophysical research atmospheres (2009).