气候变化领域集成服务门户(CCPortal): Evaluation of the hydrological contributions of permafrost to the thermokarst lakes on the Qinghai-Tibet Plateau using stable isotopes

CCPortal

DOI	10.1016/j.gloplacha.2016.03.006
	Evaluation of the hydrological contributions of permafrost to the thermokarst lakes on the Qinghai-Tibet Plateau using stable isotopes
	Yang, Yuzhong; Wu, Qingbai; Yun, Hanbo; Jin, Huijun; Zhang, Zhongqiong
发表日期	2016
ISSN	0921-8181
EISSN	1872-6364
起始页码	1
结束页码	8
卷号	140
英文摘要	Considering the widespread distribution of thermokarst lakes and their significant influence on the hydrological cycle in permafrost regions on the Qinghai-Tibet Plateau (QTP), it is necessary to study their hydrological regimes, which are responding to ongoing climate-induced permafrost thaw. In this paper, water isotopic tracers were used to assess the temporal and interannual hydrological variations and the hydrological processes of two thermokarst lakes (TL-A and TL-B) associated with thawing permafrost in Beiluhe Basin on the QTP. The isotopic results revealed significant differences between the two thermokarst lakes: the TL-A showed more positive isotopic values and small fluctuations than TL-B did. This can be attributed to the hydrological discrepancies between them. Based on the water isotopic mass balance (IMB) model and estimated evaporation, the contributions of permafrost melt water and precipitation to the thermokarst lakes were determined. In both 2011 and 2012, the contributions of thawing permafrost water to thermokarst lakes were of significance, as high as 61.3%. The modeled isotopic composition of input water (delta(1)), and the relationships between climatic factors and lake water isotopes were evaluated. Results suggested that the two lakes originated from multiple sources and confirmed the modeling process well. It also indicated that thawing of permafrost significantly affected the development and hydrological regime of thermokarst lakes on the QTP. It is necessary to emphasize the significant impact of thawing permafrost on the thermokarst lakes on the QTP. Findings demonstrate that ongoing permafrost thaw may have major implications for thermokarst landscapes as climate change continues. (C) 2016 Elsevier B.V. All rights reserved.
英文关键词	Hydrological contributions; Permafrost; Thermokarst lakes; Stable isotopes; Qinghai-Tibet Plateau
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS关键词	BEILUHE BASIN ; RIVER-BASIN ; HYDROGEN ISOTOPES ; WATER-BALANCE ; TUNDRA LAKES ; RUNOFF ; THAW ; PRECIPITATION ; OXYGEN ; DELTA-O-18
WOS记录号	WOS:000376052100001
来源期刊	GLOBAL AND PLANETARY CHANGE
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/240223
作者单位	[Yang, Yuzhong; Wu, Qingbai; Yun, Hanbo; Jin, Huijun; Zhang, Zhongqiong] Chinese Acad Sci, State Key Lab Frozen Soil Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China; [Yun, Hanbo] Chinese Acad Sci, Beiluhe Observat Stn Frozen Soil Environm & Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Yang, Yuzhong,Wu, Qingbai,Yun, Hanbo,et al. Evaluation of the hydrological contributions of permafrost to the thermokarst lakes on the Qinghai-Tibet Plateau using stable isotopes[J]. 中国科学院西北生态环境资源研究院,2016,140.
APA	Yang, Yuzhong,Wu, Qingbai,Yun, Hanbo,Jin, Huijun,&Zhang, Zhongqiong.(2016).Evaluation of the hydrological contributions of permafrost to the thermokarst lakes on the Qinghai-Tibet Plateau using stable isotopes.GLOBAL AND PLANETARY CHANGE,140.
MLA	Yang, Yuzhong,et al."Evaluation of the hydrological contributions of permafrost to the thermokarst lakes on the Qinghai-Tibet Plateau using stable isotopes".GLOBAL AND PLANETARY CHANGE 140(2016).