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000005899 084__ $$2WoS$$aGeosciences, Multidisciplinary
000005899 1001_ $$0P:(DE-Juel1)129561$$avan der Kruk, J.$$b0$$uFZJ
000005899 245__ $$aDispersion inversion of electromagnetic pulse propagation within freezing and thawing soil waveguides
000005899 260__ $$aWashington, DC$$bAmerican Geophysical Union$$c2009
000005899 300__ $$aL18503
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000005899 440_0 $$02249$$aGeophysical Research Letters$$v36$$x0094-8276
000005899 500__ $$aThis work was partly supported by a grant from ETH Zurich and by an Individual Discovery Grant to A. L. Endres and a Post Graduate Scholarship (PGS-M and PGS-D) to Colby Steelman from the Natural Science and Engineering Research Council of Canada. We also thank Alicia and Murray Smith for the use of their property as our test site.
000005899 520__ $$aFreeze and thaw processes are important components in characterizing glacial, periglacial and frozen ground environments, and hence the response of cryospheric regions to climate change. High-frequency ground-penetrating radar is particularly well suited for monitoring the freezing and thawing processes within the shallow subsurface (i.e., < 1 m depth) due to its non-invasive nature and its sensitivity to the liquid water component in soil. The freezing of moist soil and thawing of frozen soil induce leaky and low-velocity waveguides, respectively. Within these waveguide layers, the internally reflected radar energy produces interfering multiples that appear as a package of dispersed waves. Here, we present a new method for characterizing very shallow freeze and thaw processes, in which the waveguide properties are obtained by inverting the observed dispersion curves. This new method can non-invasively monitor freezing and thawing processes in a wide range of glacial, periglacial and frozen ground studies. Citation: van der Kruk, J., C. M. Steelman, A. L. Endres, and H. Vereecken (2009), Dispersion inversion of electromagnetic pulse propagation within freezing and thawing soil waveguides, Geophys. Res. Lett., 36, L18503, doi:10.1029/2009GL039581.
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000005899 7001_ $$0P:(DE-HGF)0$$aSteelman, C. M.$$b1
000005899 7001_ $$0P:(DE-HGF)0$$aEndres, A. L.$$b2
000005899 7001_ $$0P:(DE-Juel1)129549$$aVereecken, H.$$b3$$uFZJ
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000005899 8567_ $$uhttp://dx.doi.org/10.1029/2009GL039581
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