干旱区生态环境知识资源中心(Arid): Chemical composition of inorganic and organic species in snow/ice in the glaciers of western China

Arid

DOI	10.1016/j.scitotenv.2019.135351
	Chemical composition of inorganic and organic species in snow/ice in the glaciers of western China
	Thapa, Poonam 1,2; Xu, Jianzhong 1; Neupane, Bigyan 1,2; Rupakheti, Dipesh 1
通讯作者	Xu, Jianzhong
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2020
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. (C) 2019 Elsevier B.V. All rights reserved.
英文关键词	Dissolved Organic Matter (DOM) Glaciochemistry High-resolution time-of-flight mass spectrometry (HR-ToF-AMS) Tibetan Plateau
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000506376300033
WOS关键词	LIGHT-ABSORBING IMPURITIES ; AEROSOL MASS-SPECTROMETRY ; BIOMASS-BURNING SMOKE ; EASTERN TIEN-SHAN ; TIBETAN PLATEAU ; BLACK CARBON ; MOUNTAIN GLACIERS ; ICE-CORE ; NO. 1 ; ALPINE GLACIERS
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315495
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Thapa, Poonam,Xu, Jianzhong,Neupane, Bigyan,et al. Chemical composition of inorganic and organic species in snow/ice in the glaciers of western China[J],2020,706.
APA	Thapa, Poonam,Xu, Jianzhong,Neupane, Bigyan,&Rupakheti, Dipesh.(2020).Chemical composition of inorganic and organic species in snow/ice in the glaciers of western China.SCIENCE OF THE TOTAL ENVIRONMENT,706.
MLA	Thapa, Poonam,et al."Chemical composition of inorganic and organic species in snow/ice in the glaciers of western China".SCIENCE OF THE TOTAL ENVIRONMENT 706(2020).