DOI: 10.1002/grl.50187
论文题名: Linkages between lake shrinkage/expansion and sublacustrine permafrost distribution determined from remote sensing of interior Alaska, USA
作者: Jepsen S.M. ; Voss C.I. ; Walvoord M.A. ; Minsley B.J. ; Rover J.
刊名: Geophysical Research Letters
ISSN: 0094-9249
EISSN: 1944-8980
出版年: 2013
卷: 40, 期: 5 起始页码: 882
结束页码: 887
语种: 英语
英文关键词: Lake expansion
; Lake shrinkage
; Permafrost
; Taliks
Scopus关键词: Geophysical surveys
; High hydraulic conductivities
; Landsat satellite
; Multi-decadal time scale
; Permafrost distribution
; Shallow aquifers
; Spatial variability
; Taliks
; Aquifers
; Climate change
; Groundwater flow
; Hydrogeology
; Lakes
; Thawing
; Permafrost
; cold region
; geophysics
; lake ecosystem
; lake level
; permafrost
; remote sensing
; satellite data
; spatial variation
; surface area
; surveying
; Alaska
; United States
; Yukon Flats
英文摘要: Linkages between permafrost distribution and lake surface-area changes in cold regions have not been previously examined over a large scale because of the paucity of subsurface permafrost information. Here, a first large-scale examination of these linkages is made over a 5150 km2 area of Yukon Flats, Alaska, USA, by evaluating the relationship between lake surface-area changes during 1979-2009, derived from Landsat satellite data, and sublacustrine groundwater flow-path connectivity inferred from a pioneering, airborne geophysical survey of permafrost. The results suggest that the shallow (few tens of meters) thaw state of permafrost has more influence than deeper permafrost conditions on the evolving water budgets of lakes on a multidecadal time scale. In the region studied, these key shallow aquifers have high hydraulic conductivity and great spatial variability in thaw state, making groundwater flow and associated lake level evolution particularly sensitive to climate change owing to the close proximity of these aquifers to the atmosphere. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876783138&doi=10.1002%2fgrl.50187&partnerID=40&md5=98bf090e520f0d291f13cb6126eb378e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6513
Appears in Collections: 气候减缓与适应
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作者单位: National Research Program, U.S. Geological Survey, Denver, CO, United States
Recommended Citation:
Jepsen S.M.,Voss C.I.,Walvoord M.A.,et al. Linkages between lake shrinkage/expansion and sublacustrine permafrost distribution determined from remote sensing of interior Alaska, USA[J]. Geophysical Research Letters,2013-01-01,40(5).