气候变化领域集成服务门户(CCPortal): The evolution and environmental significance of glaciochemistry during the ablation period in the north of Tibetan Plateau, China

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DOI	10.1016/j.quaint.2014.06.071
	The evolution and environmental significance of glaciochemistry during the ablation period in the north of Tibetan Plateau, China
	Li Zong-xing; Feng Qi; Guo Xiao-yan; Gao Yan; Pan Yan-hui; Wang Ting-ting; Li Jian-guo; Guo Rui; Jia Bing; Song Yao-xuan; Han Chun-tan
发表日期	2015
ISSN	1040-6182
EISSN	1873-4553
卷号	374
英文摘要	In order to explore the glaciochemistry of Shiyi glacier in the central Qilian Mountains, a total of 142 samples have been collected for fresh snow, surface snow, snowpit and meltwater from July 2012 to November 2013. The results indicated cations dominated the glaciochemistry, especially the high Ca2+ concentration. Relatively high Cl- and Na+ concentrations were mainly contributed by desert dust aerosols and the atmospheric aerosols from warm water bodies such as the Black, Caspian, and Aral seas. The analysis also confirmed the chemical ions in fresh snow are mainly contributed by atmospheric wet deposition. Surface snow is mainly influenced by dry deposition, and snowpits are influenced by both atmospheric deposition and leaching process, while meltwater is influenced by water-rock interactions. The profile of ionic concentration in the snowpit became more smoothed during ablation period owing to the influence of leaching. The elution sequence of the snowpit in the Shiyi Glacier was: SO42- > K+ > Ca2+ > Mg2+ > Na+ > Cl- > NO3-. The chemical concentrations for meltwater are mainly influenced by water dilution and soil thawing. The ions in snow in the central Qilian Mountains showed relatively lower concentrations than in the western Qilian Mountains, Tianshan Mountains and Altai Mountains. It was closer to balance than in glaciers in the central Tibetan Plateau, but was higher than in the southern Tibetan Plateau. Different ionic sources and dissolution process had caused the differences of chemical composition for fresh snow, surface snow, snowpit and meltwater, and these chemical compositions reflected the atmospheric background values in the northern Tibetan Plateau. (C) 2014 Elsevier Ltd and INQUA. All rights reserved.
关键词	China Glaciochemistry Shiyi glacier Qilian Mountains
学科领域	Physical Geography; Geology
语种	英语
WOS研究方向	Geography, Physical ; Geosciences, Multidisciplinary
来源期刊	QUATERNARY INTERNATIONAL
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/111806
作者单位	Chinese Acad Sci, Gansu Hydrol & Water Resources Engn Res Ctr, 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	Li Zong-xing,Feng Qi,Guo Xiao-yan,et al. The evolution and environmental significance of glaciochemistry during the ablation period in the north of Tibetan Plateau, China[J]. 中国科学院西北生态环境资源研究院,2015,374.
APA	Li Zong-xing.,Feng Qi.,Guo Xiao-yan.,Gao Yan.,Pan Yan-hui.,...&Han Chun-tan.(2015).The evolution and environmental significance of glaciochemistry during the ablation period in the north of Tibetan Plateau, China.QUATERNARY INTERNATIONAL,374.
MLA	Li Zong-xing,et al."The evolution and environmental significance of glaciochemistry during the ablation period in the north of Tibetan Plateau, China".QUATERNARY INTERNATIONAL 374(2015).