气候变化领域集成服务门户(CCPortal): Thermal effects of lateral supra-permafrost water flow around a thermokarst lake on the Qinghai-Tibet Plateau

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DOI	10.1002/hyp.11193
	Thermal effects of lateral supra-permafrost water flow around a thermokarst lake on the Qinghai-Tibet Plateau
	You, Yanhui; Yu, Qihao; Pan, Xicai; Wang, Xinbin; Guo, Lei; Wu, Qingbai
发表日期	2017
ISSN	0885-6087
EISSN	1099-1085
起始页码	2429
结束页码	2437
卷号	31 期号:13
英文摘要	Both the inflow and outflow of supra-permafrost water to lakes play important roles in the hydrologic process of thermokarst lakes. The accompanying thermal effects on the adjacent permafrost are required for assessing their influences on the development of thermokarst lakes. For these purposes, the lake water level, temperature dynamics, and supra-permafrost water flow of a lake were monitored on the Qinghai-Tibet Plateau. In addition, the spatial and temporal variation of the active layer thickness and permafrost distribution around the lake were investigated by combining ground penetrating radar, electrical resistivity tomography, and borehole temperature monitoring. The results revealed that the yearly unfrozen supra-permafrost water flow around the lake lasted approximately 5 months. The temperature and water level measurements during this period indicate that the lake water was recharged by relatively colder supra-permafrost water from the north-western lakeshore and was discharged through the eastern lakeshore. This process, accompanied by heat exchange with the underlying permafrost, might cause a directional difference of the active layer thickness and permafrost characteristics around the lake. Specifically, the active layer thickness variation was minimal, and the ice-rich permafrost was found adjacent to the lakeshore along the recharge groundwater pathways, whereas a deeper active layer and ice-poor permafrost were observed close to the lakeshore from which the warm lake water was discharged. This study suggests that the lateral flow of warm lake water can be a major driver for the rapid expansion of thermokarst lakes and provides clues for evaluating the relationships between the thermokarst expansion process and climate warming.
英文关键词	permafrost; supra-permafrost water flow; thermo-erosion; thermokarst lakes
语种	英语
WOS研究方向	Water Resources
WOS类目	Water Resources
WOS关键词	GROUND-PENETRATING RADAR ; ELECTRICAL-RESISTIVITY TOMOGRAPHY ; ARCTIC COASTAL-PLAIN ; DISCONTINUOUS PERMAFROST ; BEILUHE BASIN ; ACTIVE LAYER ; CANADA ; TALIK ; ALASKA ; THAW
WOS记录号	WOS:000403906900008
来源期刊	HYDROLOGICAL PROCESSES
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/240247
作者单位	[You, Yanhui; Yu, Qihao; Wang, Xinbin; Guo, Lei; Wu, Qingbai] Chinese Acad Sci, State Key Lab Frozen Soils Engn Cold & Arid Reg, Environm & Engn Res Inst, Lanzhou, Peoples R China; [Pan, Xicai] Heidelberg Univ, Inst Environm Phys, Heidelberg, Germany
推荐引用方式 GB/T 7714	You, Yanhui,Yu, Qihao,Pan, Xicai,et al. Thermal effects of lateral supra-permafrost water flow around a thermokarst lake on the Qinghai-Tibet Plateau[J]. 中国科学院西北生态环境资源研究院,2017,31(13).
APA	You, Yanhui,Yu, Qihao,Pan, Xicai,Wang, Xinbin,Guo, Lei,&Wu, Qingbai.(2017).Thermal effects of lateral supra-permafrost water flow around a thermokarst lake on the Qinghai-Tibet Plateau.HYDROLOGICAL PROCESSES,31(13).
MLA	You, Yanhui,et al."Thermal effects of lateral supra-permafrost water flow around a thermokarst lake on the Qinghai-Tibet Plateau".HYDROLOGICAL PROCESSES 31.13(2017).