Abstract
In Chapter 3, we discussed the principal measurements on the electrical properties of ice grown in the laboratory and our discussion touched briefly on the electrical properties across the entire frequency spectrum. We will now consider the properties of natural glacier ice and, in doing so, concentrate our attention on the range of frequencies that are of concern in radioglaciology, i.e., 104–109Hz. In this range, both ε′ and σ∞ are essentially constant as a function of frequency, ε′ is also nearly constant with temperature, whereas σ∞ varies according to an activation energy that is essentially the same as that for the characteristic relaxation time, τ. In this part of the spectrum the Debye theory works very nicely, so that we infer results about the temperature dependence of τ from measurements of σ∞- most of the actual measurements are of the latter quantity, which is directly involved in the energy absorption rate in the ice.
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Bogorodsky, V.V., Bentley, C.R., Gudmandsen, P.E. (1985). Scientific Results in Radioglaciology. In: Radioglaciology. Glaciology and Quaternary Geology, vol 1. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-5275-1_6
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