气候变化领域集成服务门户(CCPortal): The stable isotope evolution in Shiyi glacier system during the ablation period in the north of Tibetan Plateau, China

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DOI	10.1016/j.quaint.2015.02.013
	The stable isotope evolution in Shiyi glacier system during the ablation period in the north of Tibetan Plateau, China
	Li Zongxing; Feng Qi; Liu Wei; Wang Tingting; Guo Xiaoyan; Li Zongjie; Gao Yan; Pan Yanhui; Guo Rui; Jia Bing; Song Yaoxaun; Han Chuntan
发表日期	2015
ISSN	1040-6182
EISSN	1873-4553
卷号	380
英文摘要	In order to firstly explore the stable isotope evolution of Shiyi glacier system in the central Qilian Mountains, a total of 167 samples have been collected from newly deposited snow, surface snow, snowpits, meltwater and glacier-fed river water from July 2012 to November 2013. The results indicated that only the newly deposited snow in 23 November 2013 showed a significant 'altitude effect', whereas surface snow had a reverse 'altitude effect' owing to evaporation and sublimation in summer 2012 and 2013. The delta O-18 and delta D of surface snow sharply increased from July to August and then decreased in September 2012, decreased from April to May, increased until July, and then decreased again in August 2013. The homogenization of delta O-18 and delta D was remarkable due to the post-depositional processes, and the isotopic exchange between the firn and the percolating water could cause more and more enrichment of heavy isotopes in the successive snowpits. The stable isotopes in meltwater mainly had been influenced by the ablation intensity, ablation duration and the newly deposited snow meltwater. For glacier-fed river water, the delta O-18 also had no obvious 'altitude effect'. Based on the two-component separation model, 33% and 23% of the waters originated from meltwater in Hulugou catchment on 15 May at relatively higher and lower altitude regions, respectively. On 28 July 2013, meltwater was dominant at the altitude ranges of 4077-4438 m in Hulugou catchment, accounting for almost 100% of the recharging sources, while it had contributed 44%, 42%, 32%, 20%, and 12% to runoff at the altitudes of 4038 m, 3812 m, 3600 m, 3300 m and 3000 m. (C) 2015 Elsevier Ltd and INQUA. All rights reserved.
关键词	Stable isotope Hydrograph separation Shiyi glacier Tibetan plateau
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/111803
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Ecohydrol Inland River Basin Gansu, Hydrol & Water Resources Engn Res Ctr, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Li Zongxing,Feng Qi,Liu Wei,et al. The stable isotope evolution in Shiyi glacier system 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,2015,380.
APA	Li Zongxing.,Feng Qi.,Liu Wei.,Wang Tingting.,Guo Xiaoyan.,...&Han Chuntan.(2015).The stable isotope evolution in Shiyi glacier system during the ablation period in the north of Tibetan Plateau, China.QUATERNARY INTERNATIONAL,380.
MLA	Li Zongxing,et al."The stable isotope evolution in Shiyi glacier system during the ablation period in the north of Tibetan Plateau, China".QUATERNARY INTERNATIONAL 380(2015).