气候变化领域集成服务门户(CCPortal): Diurnal dynamics of minor and trace elements in stream water draining Dongkemadi Glacier on the Tibetan Plateau and its environmental implications

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DOI	10.1016/j.jhydrol.2016.08.021
	Diurnal dynamics of minor and trace elements in stream water draining Dongkemadi Glacier on the Tibetan Plateau and its environmental implications
	Li, Xiangying; He, Xiaobo; Kang, Shichang; Sillanpaa, Mika; Ding, Yongjian; Han, Tianding; Wu, Qingbai; Yu, Zhongbo; Qin, Dahe
发表日期	2016
ISSN	0022-1694
EISSN	1879-2707
卷号	541
英文摘要	Global warming has resulted in rapid glacier retreat on the Tibetan Plateau (TP), and the impacts of glacier melting on downstream ecosystems remain largely unknown. Minor and trace elements in stream water draining Dongkemadi Glacier (DG) were examined during the ablation season of 2013. Dominant ions and elements are HCO3-, Ca2+, Fe and Sr. Water chemistry is controlled by the weathering of calcite, oxidation of pyrite and dissolution of evaporites. Correlations suggests the hydrological (e.g. meltwater generation and routing, water residence time) and physicochemical (e.g. sorption, precipitation, oversaturation) controls on species concentrations. The distribution of metals is featured by the mixture of soluble metal and non-metal ligand complexes and free monovalent and divalent ions. Downstream increased concentrations and/or fluxes of some metals and metalloid (e.g. Cr, Cu and As) suggest potential environmental impacts. Discharge-normalized cation denudation rate (372 Sigma*meq(+)m(-3)) in the DG basin is larger than those from alpine and polar glaciers, suggesting a stronger weathering of carbonate with greater abundance on the TP in comparison to other mountain and polar glacial catchments. The maximum Fe concentration exceeds the USEPA guideline, and Al, Zn and Pb are close to or of the same order of magnitude as liminal values. This implies that the TP may face a challenge of ecosystem health and environmental issue in a warming climate. (C) 2016 Elsevier B.V. All rights reserved.
关键词	Minor and trace elements Stream water Dongkemadi Glacier Tibetan Plateau
学科领域	Engineering; Geology; Water Resources
语种	英语
WOS研究方向	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
来源期刊	JOURNAL OF HYDROLOGY
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/111830
作者单位	Hohai Univ, Coll Hydrol & Water Resources, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Li, Xiangying,He, Xiaobo,Kang, Shichang,et al. Diurnal dynamics of minor and trace elements in stream water draining Dongkemadi Glacier on the Tibetan Plateau and its environmental implications[J]. 中国科学院西北生态环境资源研究院,2016,541.
APA	Li, Xiangying.,He, Xiaobo.,Kang, Shichang.,Sillanpaa, Mika.,Ding, Yongjian.,...&Qin, Dahe.(2016).Diurnal dynamics of minor and trace elements in stream water draining Dongkemadi Glacier on the Tibetan Plateau and its environmental implications.JOURNAL OF HYDROLOGY,541.
MLA	Li, Xiangying,et al."Diurnal dynamics of minor and trace elements in stream water draining Dongkemadi Glacier on the Tibetan Plateau and its environmental implications".JOURNAL OF HYDROLOGY 541(2016).