气候变化领域集成服务门户(CCPortal): Seasonal variations and sources of ambient fossil and biogenic-derived carbonaceous aerosols based on C-14 measurements in Lhasa, Tibet

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DOI	10.1016/j.atmosres.2010.01.003
	Seasonal variations and sources of ambient fossil and biogenic-derived carbonaceous aerosols based on C-14 measurements in Lhasa, Tibet
	Huang, Jie; Kang, Shichang; Shen, Chengde; Cong, Zhiyuan; Liu, Kexin; Wang, Wei; Liu, Lichao
发表日期	2010
ISSN	0169-8095
卷号	96 期号:4
英文摘要	A total of 30 samples of total suspended particles were collected at an urban site in Lhasa, Tibet from August 2006 to July 2007 for investigating carbonaceous aerosol features. The fractions of contemporary carbon (f(c)) in total carbon (TC) of ambient aerosols are presented using radiocarbon (C-14) measurements. The value off, represents the biogenic contribution to TC, as the biosphere releases organic compounds with the present C-14/C-12 level (f(c) = 1), whereas C-14 has become extinct in anthropogenic emissions of fossil carbon (f(c) = 0). The f(c) values in Lhasa ranging from 0.357 to 0.702, are higher than Beijing and Tokyo, but clearly lower than the rural region of Launceston, which indicates a major biogenic influence in Lhasa. Seasonal variations of f(c) values corresponded well with variations of pollutants concentrations (e.g. NO2). Higher f(c) values appeared in winter indicating carbonaceous aerosol is more dominated by wood burning and incineration of agricultural wastes within this season. The lower f(c) values in summer and autumn may be caused by increased diesel and petroleum emissions related to tourism in Lhasa. delta C-13 values ranged from -26.40 parts per thousand to -25.10 parts per thousand, with relative higher values in spring and summer, reflecting the increment of fossil carbon emissions. (C) 2010 Elsevier B.V. All rights reserved.
关键词	Carbonaceous aerosols C-14 delta C-13 Seasonal variations Lhasa
学科领域	Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
来源期刊	ATMOSPHERIC RESEARCH
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111576
作者单位	Chinese Acad Sci, Key Lab Tibetan Environm Changes & Land Surface P, Inst Tibetan Plateau Res, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	Huang, Jie,Kang, Shichang,Shen, Chengde,et al. Seasonal variations and sources of ambient fossil and biogenic-derived carbonaceous aerosols based on C-14 measurements in Lhasa, Tibet[J]. 中国科学院西北生态环境资源研究院,2010,96(4).
APA	Huang, Jie.,Kang, Shichang.,Shen, Chengde.,Cong, Zhiyuan.,Liu, Kexin.,...&Liu, Lichao.(2010).Seasonal variations and sources of ambient fossil and biogenic-derived carbonaceous aerosols based on C-14 measurements in Lhasa, Tibet.ATMOSPHERIC RESEARCH,96(4).
MLA	Huang, Jie,et al."Seasonal variations and sources of ambient fossil and biogenic-derived carbonaceous aerosols based on C-14 measurements in Lhasa, Tibet".ATMOSPHERIC RESEARCH 96.4(2010).