Articles | Volume 20, issue 9
https://doi.org/10.5194/tc-20-5393-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-20-5393-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Brief communication: On the potential of dual-coil frequency-domain electromagnetic (FDEM) systems to detect frozen layers in mountain permafrost environments
Department of Geosciences, University of Padua, Padova, Italy
Mauro Guglielmin
Department of Theoretical and Applied Sciences, University of Insubria, Varese, Italy
Alexander Bast
Climate Change, Extremes and Natural Hazards in Alpine Regions Research Center CERC, Davos Dorf, Switzerland
WSL Institute for Snow and Avalanche Research SLF, Permafrost Research Group, Davos Dorf, Switzerland
Stefano Ponti
Department of Theoretical and Applied Sciences, University of Insubria, Varese, Italy
Emanuele Forte
Department of Mathematics, Informatics and Geosciences, University of Trieste, Trieste, Italy
Alberto Carrera
Department of Geosciences, University of Padua, Padova, Italy
Luca Peruzzo
Department of Geosciences, University of Padua, Padova, Italy
Simone Peracchi
Department of Geosciences, University of Padua, Padova, Italy
Giorgio Cassiani
Department of Geosciences, University of Padua, Padova, Italy
Jacopo Boaga
Department of Geosciences, University of Padua, Padova, Italy
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Cited articles
Bast, A., Pavoni, M., Lichtenegger, M., Buckel, J., and Boaga, J.: The Use of Textile Electrodes for Electrical Resistivity Tomography in Periglacial, Coarse Blocky Terrain: A Comparison With Conventional Steel Electrodes, Permafrost Periglac., 36, 110–122, https://doi.org/10.1002/ppp.2257, 2025.
Binley, A. and Slater, L.: Resistivity and induced polarization: Theory and applications to the near-surface earth, Cambridge University Press, https://doi.org/10.1017/9781108685955, 2020.
Blanchy, G., Saneiyan, S., Boyd, J., McLachlan, P., and Binley, A.: ResIPy, an intuitive open source software for complex geoelectrical inversion/modeling, Comput. Geosci., 137, 104423, https://doi.org/10.1016/j.cageo.2020.104423, 2020.
Boaga, J.: The use of FDEM in hydrogeophysics: A review, J. Appl. Geophys., 139, 36–46, https://doi.org/10.1016/j.jappgeo.2017.02.011, 2017.
Boaga, J., Phillips, M., Noetzli, J., Haberkorn, A., Kenner, R., and Bast, A.: A comparison of frequency domain electro-magnetometry, electrical resistivity tomography and borehole temperatures to assess the presence of ice in a rock glacier, Front. Earth Sci., 8, 586430, https://doi.org/10.3389/feart.2020.586430, 2020.
Boaga, J., Pavoni, M., Bast, A., and Weber, S.: Brief communication: On the potential of seismic polarity reversal to identify a thin low-velocity layer above a high-velocity layer in ice-rich rock glaciers, The Cryosphere, 18, 3231–3236, https://doi.org/10.5194/tc-18-3231-2024, 2024.
Carrera, A., Peruzzo, L., Longo, M., Cassiani, G., and Morari, F.: Uncovering soil compaction: performance of electrical and electromagnetic geophysical methods, SOIL, 10, 843–857, https://doi.org/10.5194/soil-10-843-2024, 2024.
Etzelmüller, B, Guglielmin, M, Hauck, C., Hilbich, C., Hoelzle, M., Isaksen, K., Noetzli, J., Oliva, M., and Ramos, M.: Twenty years of European mountain permafrost dynamics-the PACE legacy, Environ. Res. Lett., 15, 104070, https://doi.org/10.1088/1748-9326/abae9d, 2020.
Guglielmin, M. and Tellini, C.: Contributo alla conoscenza dei rock glaciers delle Alpi italiane. I rock glaciers del Livignasco (Alta Valtellina), Rivista Geografica Italiana, 99, 395–414, 1992.
Hauck, C. and Kneisel, C.: Applied geophysics in periglacial environments, Cambridge University Press, ISBN 9780521889667, 2008.
Herring, T. and Lewkowicz, A. G.: A systematic evaluation of electrical resistivity tomography for permafrost interface detection using forward modeling, Permafrost Periglac., 33, 134–146, https://doi.org/10.1002/ppp.2141, 2022.
McLachlan, P., Blanchy, G., and Binley, A.: EMagPy: Open-source standalone software for processing, forward modeling and inversion of electromagnetic induction data, Comput. Geosci., 146, 104561, https://doi.org/10.1016/j.cageo.2020.104561, 2021.
McNeill, J. D.: Electromagnetic terrain conductivity measurement at low induction numbers, Geonics Ltd., Technical Note TN-6, Mississauga, Ontario, https://www.geonics.com/pdfs/technicalnotes/tn6.pdf (last access: 21 September 2026), 1980.
Pavoni, M.: Frequency Domain Electromagnetic (FDEM) datasets: Fluela Pass, Stelvio Pass, and Scorluzzo. Brief Communication EGUSPHERE-2026-1264, Zenodo [data set], https://doi.org/10.5281/zenodo.22092969, 2026.
Pavoni, M., Sirch, F., and Boaga, J.: Electrical and electromagnetic geophysical prospecting for the monitoring of rock glaciers in the Dolomites, Northeast Italy, Sensors, 21, 1294, https://doi.org/10.3390/s21041294, 2021.
Pavoni, M., Carrera, A., and Boaga, J.: Improving the galvanic contact resistance for geoelectrical measurements in debris areas: A case study, Near Surf. Geophys., 20, 178–191, https://doi.org/10.1002/nsg.12192, 2022.
Pavoni, M., Boaga, J., Carrera, A., Urbini, S., de Blasi, F., and Gabrieli, J.: Combining Ground Penetrating Radar and Frequency Domain Electromagnetic Surveys to Characterize the Structure of the Calderone Glacieret (Gran Sasso d'Italia, Italy), Remote Sensing, 15, 2615, https://doi.org/10.3390/rs15102615, 2023.
Pavoni, M., Peruzzo, L., Boaga, J., Carrera, A., Barone, I., and Bast, A.: Brief communication: Use of lightweight and low-cost steel net electrodes for electrical resistivity tomography (ERT) surveys performed on coarse-blocky surface environments, The Cryosphere, 19, 4141–4148, https://doi.org/10.5194/tc-19-4141-2025, 2025.
Phillips, M., Buchli, C., Weber, S., Boaga, J., Pavoni, M., and Bast, A.: Brief communication: Combining borehole temperature, borehole piezometer and cross-borehole electrical resistivity tomography measurements to investigate seasonal changes in ice-rich mountain permafrost, The Cryosphere, 17, 753–760, https://doi.org/10.5194/tc-17-753-2023, 2023.
van't Veen, K. M., Ferré, T. P. A., Iversen, B. V., and Børgesen, C. D.: Using machine learning to predict optimal electromagnetic induction instrument configurations for characterizing the shallow subsurface, Hydrol. Earth Syst. Sci., 26, 55–70, https://doi.org/10.5194/hess-26-55-2022, 2022.
Wagner, F. M. and Uhlemann, S.: An overview of multimethod imaging approaches in environmental geophysics, Adv. Geophys., 62, 1–72, 2021.
Short summary
This study explores the potential of the frequency-domain electromagnetic (FDEM) method for investigating mountain permafrost environments such as rock glaciers. Although less accurate than electrical resistivity tomography (ERT), FDEM allows rapid measurements of subsurface electrical properties and requires much lower logistical effort, making it suitable for preliminary surveys in remote areas and for large-scale site characterization.
This study explores the potential of the frequency-domain electromagnetic (FDEM) method for...