Differential interferometric synthetic aperture radar (DINSAR)
provides a sensitive means of monitoring small changes over large area.
Using this technique. The authors detected the differential uplift
within 3 centimeters in and around the Imnavait watershed and Toolik
Lake at foothills of the Brooks Range, Alaska, from August 30 to October
4, 1995. The deformation pattern is strongly related to the topography.
By analyzing the existing data of the distribution of the active layer
thickness and moisture content, the authors conclude that the
deformation was caused by upheaval of the active layer. The result shows
the potential for regional monitoring of changes of the active layer
over the permafrost during thaw and freeze cycle using DINSAR technique
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