气候变化领域集成服务门户(CCPortal): Dissolved Organic Matter and Inorganic Ions in a Central Himalayan Glacier-Insights into Chemical Composition and Atmospheric Sources

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DOI	10.1021/es4009882
	Dissolved Organic Matter and Inorganic Ions in a Central Himalayan Glacier-Insights into Chemical Composition and Atmospheric Sources
	Xu, Jianzhong; Zhang, Qi; Li, Xiangying; Ge, Xinlei; Xiao, Cunde; Ren, Jiawen; Qin, Dahe
发表日期	2013
ISSN	0013-936X
起始页码	6181
结束页码	6188
卷号	47 期号:12
英文摘要	Melting of Himalayan glaciers can be accelerated by the deposition of airborne black carbon and mineral dust as it leads to significant reductions of the surface albedo of snow and ice. Whereas South Asia has been shown a primary source region to these particles, detailed sources of these aerosol pollutants remain poorly understood. In this study, the chemical compositions of snow pit samples collected from Jima Yangzong glacier in the central Himalayas were analyzed to obtain information of atmospheric aerosols deposited from summer 2009 to spring 2010. Especially, an Aerodyne high resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS) was used for the first time to chemically characterize the dissolved organic and inorganic matter (DOM and DIM) in snow samples. The concentrations of these species varied seasonally, with high levels observed during the winter-spring period and low levels during the summer monsoon period. On average, the dissolved substances was dominated by organics (58%) with important contributions from inorganic species, NO3- (12.5%), Ca2+ (9.1%), NH4+ (8.7%), and SO4 (2-) (8.1%). DOM was found more oxidized with an average (+/- 1 sigma) atomic oxygen-to-carbon ratio (n(O)/n(C)) of 0.64 (+/- 0.14) and organic mass-to-carbon ratio (OM/OC) of 2.01 (+/- 0.19) during the winter-spring periods compared to the summer season (n(O)/n(C) = 0.31 +/- 0.09 and OM/OC = 1.58 +/- 0.12). In addition, biomass burning particles were found significantly enhanced in snow during the winter-spring periods, consistent with HYSPLIT back trajectory analysis of air mass history, which indicates prevailing atmospheric transport from northwest India and Nepal.
WOS研究方向	Engineering ; Environmental Sciences & Ecology
WOS类目	Engineering, Environmental ; Environmental Sciences
来源期刊	ENVIRONMENTAL SCIENCE & TECHNOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158612
作者单位	Xu, JZ (corresponding author), Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China.
推荐引用方式 GB/T 7714	Xu, Jianzhong,Zhang, Qi,Li, Xiangying,et al. Dissolved Organic Matter and Inorganic Ions in a Central Himalayan Glacier-Insights into Chemical Composition and Atmospheric Sources[J],2013,47(12).
APA	Xu, Jianzhong.,Zhang, Qi.,Li, Xiangying.,Ge, Xinlei.,Xiao, Cunde.,...&Qin, Dahe.(2013).Dissolved Organic Matter and Inorganic Ions in a Central Himalayan Glacier-Insights into Chemical Composition and Atmospheric Sources.ENVIRONMENTAL SCIENCE & TECHNOLOGY,47(12).
MLA	Xu, Jianzhong,et al."Dissolved Organic Matter and Inorganic Ions in a Central Himalayan Glacier-Insights into Chemical Composition and Atmospheric Sources".ENVIRONMENTAL SCIENCE & TECHNOLOGY 47.12(2013).