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DOI	10.1029/2010JD013972
	Transport of semivolatile organic compounds to the Tibetan Plateau: Monthly resolved air concentrations at Nam Co
	Xiao, Hang; Kang, Shichang; Zhang, Qianggong; Han, Wenwu; Loewen, Mark; Wong, Fiona; Hung, Hayley; Lei, Ying D.; Wania, Frank
发表日期	2010
ISSN	2169-897X
EISSN	2169-8996
卷号	115
英文摘要	A flow-through sampler was deployed to record the seasonal variability of the atmospheric concentrations of semivolatile organic compounds (SOCs) at a remote research station located close to Nam Co Lake on the Tibetan plateau. Between October 2006 and February 2008, fifteen consecutive one month-long samples, with air volumes ranging from 4,500 to 16,000 m(3), were taken and analyzed for polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs) and organochlorine pesticides (OCPs). Separate analysis of three polyurethane plugs in series in combination with frontal chromatographic theory allows for the correction of the break-through observed for the most volatile SOCs. The concentrations of Sigma 56PCB in air range from 0.10 to 2.6 pg.m(-3) and are among the lowest values ever reported. Levels of OCPs at Nam Co are generally also very low, particularly during wintertime. The concentrations of hexachlorocyclohexanes (HCHs), endosulfans, and various dichlorodiphenyltrichloroethane (DDT) related substances display a distinct seasonal variability consistent with the monsoon. Back-trajectory analysis reveals that higher OCP levels during summer correlate with air mass origin south of the Himalayas. A high alpha/gamma-HCH ratio and a non-racemic composition of alpha-HCH during July/August suggest that evaporation from Nam Co Lake contributes to the relatively high concentrations of alpha-HCH (averaging ca. 91 pg.m(-3)) recorded in the summertime atmosphere.
学科领域	Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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/111570
作者单位	Univ Toronto Scarborough, Dept Chem Engn & Appl Chem, Toronto, ON M1C 1A4, Canada
推荐引用方式 GB/T 7714	Xiao, Hang,Kang, Shichang,Zhang, Qianggong,et al. Transport of semivolatile organic compounds to the Tibetan Plateau: Monthly resolved air concentrations at Nam Co[J]. 中国科学院西北生态环境资源研究院,2010,115.
APA	Xiao, Hang.,Kang, Shichang.,Zhang, Qianggong.,Han, Wenwu.,Loewen, Mark.,...&Wania, Frank.(2010).Transport of semivolatile organic compounds to the Tibetan Plateau: Monthly resolved air concentrations at Nam Co.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,115.
MLA	Xiao, Hang,et al."Transport of semivolatile organic compounds to the Tibetan Plateau: Monthly resolved air concentrations at Nam Co".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 115(2010).