1887

Abstract

Summary

This contribution introduces a time-lapse extension of a geophysically-based 4-phase model to calculate ground ice content changes in the context of permafrost degradation due to climate change. The model uses input data from time-lapse Electrical Resistivity Tomography and Refraction Seismic Tomography monitoring and is based on simple petrophysical relationships. In time-lapse formulation, the model is not anymore dependent on time-invariant properties such as porosity, pore water resistivity, cementation exponent and P-wave velocity of rock. The time-lapse 4-phase model was then applied to long-term ERT and RST data from the mountain permafrost site Schilthorn, Swiss Alps, where a substantial ground ice loss could be detected during the past decade.

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/content/papers/10.3997/2214-4609.201702024
2017-09-03
2024-03-28
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