气候变化领域集成服务门户(CCPortal): Impacts of groundwater flow on the evolution of a thermokarst lake in the permafrost-dominated region on the Qinghai-Tibet plateau

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DOI	10.1002/hyp.14443
	Impacts of groundwater flow on the evolution of a thermokarst lake in the permafrost-dominated region on the Qinghai-Tibet plateau
	Wang, Wei; Li, Jinlong; Ke, Xianmin; Chen, Kai; Gao, Zeyong; Niu, Fujun
通讯作者	Wang, W (通讯作者)，Changan Univ, Sch Water & Environm, Xian 710054, Shaanxi, Peoples R China.
发表日期	2021
ISSN	0885-6087
EISSN	1099-1085
卷号	35 期号:12
英文摘要	As a result of global warming induced permafrost degradation in recent decades, thermokarst lakes in the Qinghai-Tibet plateau (QTP) have been regulating local hydrological and ecological processes. Simulations with coupled moisture-heat numerical models in the Beiluhe basin (located in the hinterland of permafrost regions on the QTP) have provided insights into the interaction between groundwater flow and the freeze-thaw process. A total of 30 modified SUTRA scenarios were established to examine the effects of hydrodynamic forces, permeability, and climate on thermokarst lakes. The results indicate that the hydrodynamic condition variables regulate the permafrost degradation around the lakes. In case groundwater recharges to the lake, a low-temperature groundwater flow stimulates the expansion of the surrounding thawing regions through thermal convection. The thawing rate of the permafrost underlying the lake intensifies when groundwater is discharged from the lake. Under different permeability conditions, spatiotemporal variations in the active layer thickness significantly influence the occurrence of an open talik at the lake bottom. A warmer and wetter climate will inevitably lead to a sharp decrease in the upper limit of the surrounding permafrost, with a continual decrease in the duration of open talik events. Overall, our results underscore that comprehensive consideration of the relevant hydrologic processes is critical for improving the understanding of environmental and ecological changes in cold environments.
关键词	BEILUHE BASIN WATER-BALANCE THAW CLIMATE HEAT TRANSPORT
英文关键词	groundwater flow; numerical simulation; permafrost; Qinghai-Tibet plateau; thermokarst lake
语种	英语
WOS研究方向	Water Resources
WOS类目	Water Resources
WOS记录号	WOS:000737864100001
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/254996
作者单位	[Wang, Wei; Li, Jinlong; Ke, Xianmin; Chen, Kai] Changan Univ, Sch Water & Environm, Xian 710054, Shaanxi, Peoples R China; [Wang, Wei; Li, Jinlong; Ke, Xianmin; Chen, Kai] Changan Univ, Minist Educ, Key Lab Subsurface Hydrol & Ecol Effect Arid Reg, Xian, Shaanxi, Peoples R China; [Wang, Wei] Sichuan Univ, Coll Water Resource & Hydropower, State Key Lab Hydraul & Mt River Dev & Protect, Chengdu, Peoples R China; [Gao, Zeyong; Niu, Fujun] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Wang, Wei,Li, Jinlong,Ke, Xianmin,et al. Impacts of groundwater flow on the evolution of a thermokarst lake in the permafrost-dominated region on the Qinghai-Tibet plateau[J]. 中国科学院西北生态环境资源研究院,2021,35(12).
APA	Wang, Wei,Li, Jinlong,Ke, Xianmin,Chen, Kai,Gao, Zeyong,&Niu, Fujun.(2021).Impacts of groundwater flow on the evolution of a thermokarst lake in the permafrost-dominated region on the Qinghai-Tibet plateau.HYDROLOGICAL PROCESSES,35(12).
MLA	Wang, Wei,et al."Impacts of groundwater flow on the evolution of a thermokarst lake in the permafrost-dominated region on the Qinghai-Tibet plateau".HYDROLOGICAL PROCESSES 35.12(2021).