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DTS GROUND TEMPERATURE MEASUREMENTS IN MOUNTAIN PERMAFROST – THE 2ALPES-3065 BOREHOLE (FRENCH ALPS)
Session: Characterization of Permafrost State and Variability I / Caractérisation et variabilité du pergélisol I
Philippe Schoeneich, Université de Grenoble Alpes (France)
Jean-Michel Krysiecki, Bureau SAGE/ADRGT (France)
Ludovic Mingrat, Bureau SAGE/ADRGT (France)
Hendrik Huwald, Ecole Polytechnique Fédérale de Lausanne (Suisse)
A 100 m deep borehole in mountain permafrost has been equipped with both a thermistor chain and a fiber optic cable for DTS measurements. The device permits to assess the resolution and accuracy of DTS measurements through the comparison of parallel DTS profiles and with classical sensors. First results show a resolution in the order of 0.1 °C can be achieved, but that the accuracy is strongly dependent on the calibration of the measurement.
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