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DOI	10.1029/2011GL047911
	Exchange of groundwater and surface-water mediated by permafrost response to seasonal and long term air temperature variation
	Ge, Shemin; McKenzie, Jeffrey; Voss, Clifford; Wu, Qingbai
发表日期	2011
ISSN	0094-8276
卷号	38
英文摘要	Permafrost dynamics impact hydrologic cycle processes by promoting or impeding groundwater and surface water exchange. Under seasonal and decadal air temperature variations, permafrost temperature changes control the exchanges between groundwater and surface water. A coupled heat transport and groundwater flow model, SUTRA, was modified to simulate groundwater flow and heat transport in the subsurface containing permafrost. The northern central Tibet Plateau was used as an example of model application. Modeling results show that in a yearly cycle, groundwater flow occurs in the active layer from May to October. Maximum groundwater discharge to the surface lags the maximum subsurface temperature by two months. Under an increasing air temperature scenario of 3 C per 100 years, over the initial 40-year period, the active layer thickness can increase by three-fold. Annual groundwater discharge to the surface can experience a similar three-fold increase in the same period. An implication of these modeling results is that with increased warming there will be more groundwater flow in the active layer and therefore increased groundwater discharge to rivers. However, this finding only holds if sufficient upgradient water is available to replenish the increased discharge. Otherwise, there will be an overall lowering of the water table in the recharge portion of the catchment. Citation: Ge, S., J. McKenzie, C. Voss, and Q. Wu (2011), Exchange of groundwater and surface-water mediated by permafrost response to seasonal and long term air temperature variation, Geophys. Res. Lett., 38, L14402, doi:10.1029/2011GL047911.
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS关键词	INTERNATIONAL POLAR YEAR ; ACTIVE-LAYER ; THERMAL STATE ; TRANSPORT ; FLOW ; SOIL
WOS记录号	WOS:000293386900003
来源期刊	GEOPHYSICAL RESEARCH LETTERS
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/240314
作者单位	[Ge, Shemin] Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA; [McKenzie, Jeffrey] McGill Univ, Montreal, PQ H3A 2A7, Canada; [Voss, Clifford] US Geol Survey, Menlo Pk, CA 94025 USA; [Wu, Qingbai] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Ge, Shemin,McKenzie, Jeffrey,Voss, Clifford,et al. Exchange of groundwater and surface-water mediated by permafrost response to seasonal and long term air temperature variation[J]. 中国科学院西北生态环境资源研究院,2011,38.
APA	Ge, Shemin,McKenzie, Jeffrey,Voss, Clifford,&Wu, Qingbai.(2011).Exchange of groundwater and surface-water mediated by permafrost response to seasonal and long term air temperature variation.GEOPHYSICAL RESEARCH LETTERS,38.
MLA	Ge, Shemin,et al."Exchange of groundwater and surface-water mediated by permafrost response to seasonal and long term air temperature variation".GEOPHYSICAL RESEARCH LETTERS 38(2011).