气候变化领域集成服务门户(CCPortal): Chemical composition of inorganic and organic species in snow/ice in the glaciers of western China

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DOI	10.1016/j.scitotenv.2019.135351
	Chemical composition of inorganic and organic species in snow/ice in the glaciers of western China
	Thapa P.; Xu J.; Neupane B.; Rupakheti D.
发表日期	2020
ISSN	1470160X
卷号	706
英文摘要	Recent studies have revealed the abundance of dissolved organic matter (DOM) in snow/glaciers of the Tibetan Plateau (TP). Here, we present a comprehensive study on the chemical compositions of snowpit samples collected from widely distributed eight glaciers in the western China (six from the TP) to investigate the spatial variation of deposited atmospheric aerosols. An Aerodyne high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS) was used to chemically characterize the DOM in snow samples which can offer chemical properties of DOM. Highest mass concentration of dissolved species mass was observed in Tienshan Baishui No 1 glacier (TS, 6.55 ± 0.85 mg/L) close to Takalamagan Desert, whereas lowest (0.89 ± 0.18 mg/L) was observed in Zadang Glacier (ZD) in the central TP. DOM (8–40%) and calcium as well as magnesium (9–67%) were generally the most abundant chemical species. Average DOM concentration in the TP glaciers among the investigated sites were comparable. DOM was found highly oxidized with an oxygen to carbon ratio (O/C ratio) ranging from 0.82 to 1.03. Highly oxidized DOM could have related with aerosol aqueous processes as illustrated by observed organic acids. This study provides insights into the spatial variations of the DOM and dissolved inorganic matter, as well as oxidized organic aerosol, were most likely due to local and regional contribution. © 2019 Elsevier B.V.
英文关键词	Dissolved Organic Matter (DOM); Glaciochemistry; High-resolution time-of-flight mass spectrometry (HR-ToF-AMS); Tibetan Plateau
语种	英语
scopus关键词	Science of the Total Environment
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/158457
作者单位	State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences CAS, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China
推荐引用方式 GB/T 7714	Thapa P.,Xu J.,Neupane B.,et al. Chemical composition of inorganic and organic species in snow/ice in the glaciers of western China[J]. 中国科学院西北生态环境资源研究院,2020,706.
APA	Thapa P.,Xu J.,Neupane B.,&Rupakheti D..(2020).Chemical composition of inorganic and organic species in snow/ice in the glaciers of western China.,706.
MLA	Thapa P.,et al."Chemical composition of inorganic and organic species in snow/ice in the glaciers of western China".706(2020).