Journal ArticleDOI
Application of capacitively‐coupled and DC electrical resistivity imaging for mountain permafrost studies
Christian Hauck,Christof Kneisel +1 more
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TLDR
In this article, a capacitively-coupled resistivity system (OhmMapper) operating in the kilohertz range and a standard galvanically coupled multi-electrode resistivity (SYSCAL) system operating in direct-current (DC) limit were compared in terms of permafrost detection.Abstract:
A capacitively-coupled resistivity system (OhmMapper) operating in the kilohertz range and a standard galvanically-coupled multi-electrode resistivity system (SYSCAL) operating in the direct-current (DC) limit were compared in terms of permafrost detection. The systems differ mainly in relation to operating frequency and the principle used to ensure sufficient electrical coupling between the sensors and the ground. Both were able to detect isolated permafrost in the Swiss Alps previously found by various geophysical field surveys. However, inter-year differences between results using the same system were less than differences between the two at the same time and at exactly the same location. There was good agreement between the systems at an unfrozen reference area, whereas at a mountain permafrost site, apparent electrical resistivity values with the capacitively-coupled system were approximately one quarter of those obtained with the galvanically-coupled system. As dielectric effects in resistive permafrost terrain become more important at lower frequencies (around 1 kHz) than in comparable but unfrozen environments (around 10 MHz), permafrost resistivity values obtained with the OhmMapper are generally lower than galvanically obtained values near the DC limit. Copyright © 2006 John Wiley & Sons, Ltd.read more
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Journal ArticleDOI
Recent developments in the direct-current geoelectrical imaging method
TL;DR: There have been major improvements in instrumentation, field survey design and data inversion techniques for the geoelectrical method over the past 25 years as mentioned in this paper, which has made it possible to conduct large 2D, 3D and even 4D surveys efficiently to resolve complex geological structures that were not possible with traditional 1-D surveys.
Journal ArticleDOI
Permafrost and climate in Europe: Monitoring and modelling thermal, geomorphological and geotechnical responses
Charles Harris,Lukas U. Arenson,Hanne H. Christiansen,Bernd Etzelmüller,Regula Frauenfelder,Stephan Gruber,Wilfried Haeberli,Christian Hauck,Martin Hölzle,Ole Humlum,Ketil Isaksen,Andreas Kääb,Martina A. Kern-Lütschg,Michael Lehning,Norikazu Matsuoka,Julian B. Murton,Jeanette Nötzli,Marcia Phillips,Neil Ross,Matti Seppälä,Sarah M. Springman,Daniel Vonder Mühll +21 more
TL;DR: In this article, the authors present a review of the changing state of European permafrost within a spatial zone that includes the continuous high latitude arctic permfrost of Svalbard and the discontinuous high altitude mountain permaffrost of Iceland, Fennoscandia and the Alps.
Journal ArticleDOI
Advances in geophysical methods for permafrost investigations
TL;DR: In this paper, a review of the geophysical methods most frequently applied in mountain and arctic/subarctic lowland permafrost investigations is presented, focusing on the tomographic capabilities of geophysical techniques.
Journal ArticleDOI
Landform characterization using geophysics—Recent advances, applications, and emerging tools
TL;DR: In this paper, the authors present an overview of the strengths and limitations of existing and emerging geophysical tools for landform studies, including ground-penetrating radar (GPR), electrical resistivity (ER), seismics, and electromagnetic induction.
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Landform characterization using geophysics—Recent advances, applications, and emerging tools
TL;DR: For a review of the current state-of-the-art in terrestrial landform characterization, see as mentioned in this paper, where the authors present an overview of existing and emerging geophysical tools for landform studies.
References
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Journal ArticleDOI
Least-squares deconvolution of apparent resistivity pseudosections
M. H. Loke,R. D. Barker +1 more
TL;DR: In this article, a smoothness-constrained least square method is used to produce a 2D subsurface model free of distortions in the apparent resistivity pseudosection caused by the electrode array geometry used.
Journal ArticleDOI
Assessing reliability of 2D resistivity imaging in mountain permafrost studies using the depth of investigation index method
L. Marescot,Meng Heng Loke,D. Chapellier,Reynald Delaloye,Christophe Lambiel,Emmanuel Reynard +5 more
TL;DR: In this paper, a 2D electrical resistivity tomography has been applied within a mountain permafrost environment to assist in ice location, and a special inversion algorithm was applied to process depth of investigation (DOI) index maps.
Journal ArticleDOI
Frozen ground monitoring using DC resistivity tomography
Christian Hauck,Christian Hauck +1 more
TL;DR: In this paper, a 2D DC resistivity tomography was used to monitor the permafrost evolution over monthly to seasonal time scales, showing a strong decrease during the winter months in the near-surface layer and a quasi-sinusoidal behaviour at greater depths.
Journal ArticleDOI
Using DC resistivity tomography to detect and characterize mountain permafrost
TL;DR: In this article, the location and the approximate lateral and vertical extent of an ice core within a moraine was determined by direct-current resistivity tomography in the Swiss and the Italian Alps.
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