气候变化领域集成服务门户(CCPortal): Unraveling of permafrost hydrological variabilities on Central Qinghai-Tibet Plateau using stable isotopic technique

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DOI	10.1016/j.scitotenv.2017.06.213
	Unraveling of permafrost hydrological variabilities on Central Qinghai-Tibet Plateau using stable isotopic technique
	Yang, Yuzhong; Wu, Qingbai; Hou, Yandong; Zhang, Zhongqiong; Zhan, Jing; Gao, Siru; Jin, Huijun
发表日期	2017
ISSN	0048-9697
EISSN	1879-1026
起始页码	199
结束页码	210
卷号	605
英文摘要	Permafrost degradation on the Qinghai-Tibet Plateau (QTP) will substantially alter the surface runoff discharge and generation, which changes the recharge processes and influences the hydrological cycle on the QTP. Hydrological connections between different water bodies and the influence of thawing permafrost (ground ice) are not well understood on the QTP. This study applied water stable isotopic method to investigate the permafrost hydrological variabilities in Beiluhe Basin (BLB) on Central QTP. Isotopic variations of precipitation, river flow, thermokarst lake, and near-surface ground ice were identified to figure out the moisture source of them, and to elaborate the hydrological connections in permafrost region. Results suggested that isotopic seasonalities in precipitation is evident, it is showing more positive values in summer seasons, and negative values in winter seasons. Stable isotopes of river flow are mainly distributed in the range of precipitation which is indicative of important replenishment from precipitation. delta O-18, delta D of thermokarst lakes are more positive than precipitation, indicating of basin-scale evaporation of lake water. Comparison of delta(I) values in different water bodies shows that hydrology of thermokarst lakes was related to thawing of permafrost (ground ice) and precipitation. Near-surface ground ice in BLB exhibits different isotopic characteristics, and generates a special delta D-delta O-18 relationship (freezing line): delta D = 5.81 delta O-18-23.02, which reflects typical freezing of liquid water. From isotopic analysis, it is inferred that near-surface ground ice was mainly recharged by precipitation and active layer water. Stable isotopic and conceptual model is suggestive of striking hydrological connections between precipitation, river flow, thermokarst lake, and ground ice under degrading permafrost. This research provides fundamental comprehensions into the hydrological processes in permafrost regions on QTP, which should be considered in investigating the influence of thawing permafrost on the hydrological cycle on QTP. (C) 2017 Elsevier B.V. All rights reserved.
英文关键词	Permafrost hydrology; Stable isotopes; Qinghai-Tibet Plateau; Ground ice
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS关键词	HOLOCENE ICE WEDGES ; GROUND ICE ; ALTITUDINAL VARIATIONS ; DEUTERIUM EXCESS ; WATER-BALANCE ; RIVER-BASIN ; PRECIPITATION ; MOISTURE ; LAKES ; EVAPORATION
WOS记录号	WOS:000408275500022
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
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/240258
作者单位	[Yang, Yuzhong; Wu, Qingbai; Zhang, Zhongqiong; Zhan, Jing; Gao, Siru; Jin, Huijun] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China; [Wu, Qingbai] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Beiluhe Observat Stn Frozen Soil Environm & Engn, Lanzhou 730000, Gansu, Peoples R China; [Hou, Yandong] Lanzhou Univ Technol, Sch Civil Engn, Lanzhou, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Yang, Yuzhong,Wu, Qingbai,Hou, Yandong,et al. Unraveling of permafrost hydrological variabilities on Central Qinghai-Tibet Plateau using stable isotopic technique[J]. 中国科学院西北生态环境资源研究院,2017,605.
APA	Yang, Yuzhong.,Wu, Qingbai.,Hou, Yandong.,Zhang, Zhongqiong.,Zhan, Jing.,...&Jin, Huijun.(2017).Unraveling of permafrost hydrological variabilities on Central Qinghai-Tibet Plateau using stable isotopic technique.SCIENCE OF THE TOTAL ENVIRONMENT,605.
MLA	Yang, Yuzhong,et al."Unraveling of permafrost hydrological variabilities on Central Qinghai-Tibet Plateau using stable isotopic technique".SCIENCE OF THE TOTAL ENVIRONMENT 605(2017).