Linkages between lake shrinkage/expansion and sublacustrine permafrost distribution determined from remote sensing of interior Alaska, USA
作者： S. M. Jepsen , C. I. Voss , M. A. Walvoord , B. J. Minsley , J. Rover
DOI: 10.1002/GRL.50187
关键词: Groundwater 、 Permafrost 、 Hydraulic conductivity 、 Aquifer 、 Geophysical survey 、 Geology 、 Hydrology 、 Groundwater flow 、 Spatial variability 、 Remote sensing 、 Climate change
摘要: 5150 km 2 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 a pioneering, airborne geophysical survey permafrost. The results suggest that shallow (few tens meters) thaw state permafrost has more influence than deeper conditions on evolving water budgets lakes multidecadal time scale. In region studied, these key aquifers have high hydraulic conductivity great spatial variability in state, making flow associated level evolution particularly sensitive to climate change owing close proximity atmosphere. Citation: Jepsen, S. M., C. I. Voss, M. A. Walvoord, B. J. Minsley, Rover (2013), Linkages shrinkage/expansion distribution determined remote sensing interior Geophys. Res. Lett., 40, doi:10.1002/grl.50187.
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