Preprints
https://doi.org/10.5194/tc-2022-190
https://doi.org/10.5194/tc-2022-190
 
01 Nov 2022
01 Nov 2022
Status: this preprint is currently under review for the journal TC.

Induced Electromagnetic prospecting for the characterization of the European southernmost glacier: the Calderone Glacier, Apennines, Italy

Mirko Pavoni1, Jacopo Boaga1, Alberto Carrera2, Stefano Urbini3, Fabrizio de Blasi4,5, and Jacopo Gabrieli4,5 Mirko Pavoni et al.
  • 1Department of Geosciences, University of Padova, Padua, Italy
  • 2Department of Agronomy, Food, Natural Resources, Animals and Environment, University of Padova, Legnaro (PD), Italy
  • 3Istituto Nazionale di Geofisica e Vulcanologia, Dipartimento Ambiente, Rome, Italy
  • 4Institute of Polar Sciences, National Research Council (CNR-ISP), Venice, Italy
  • 5Department of Environmental Sciences, Informatics and Statistics, Ca’ Foscari University of Venice, Venice, Italy

Abstract. The increasing rate of glacier retreat in recent decades is well documented and represents a great loss for the paleoclimate studies. In this framework, Ice Memory project aims to extract and analyze ice cores from worldwide glacier regions and then storage them in Antarctica as heritage for future generations. Ice coring projects usually require a focused geophysical investigation, often based on the Ground Penetrating Radar (GPR) technique and the active seismic prospection, in order to assess the most suitable drilling positions. As novelty, in the Calderone Glacier, we integrated the GPR results with a Frequency Domain Electro-Magnetic (FDEM) prospection which is not commonly applied in the glacial environment. A separated-coils FDEM instrument has been used to characterize the glacier up to several tens of meters of depth. The acquired FDEM datasets were inverted and compared to the GPR data and borehole information. The results demonstrate the ability of the FDEM instrument to correctly define the structure of the glacier and therefore its potential to be applied in frozen subsoils studies. All this opens new perspectives for the use of FDEM technique to characterize glacial or periglacial environments as rock glaciers, where the GPR acquisition logistic is limited by the rock blocky surface and affected by the scattering from surface debris.

Mirko Pavoni et al.

Status: open (until 27 Dec 2022)

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Mirko Pavoni et al.

Mirko Pavoni et al.

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Short summary
The Ice Memory project aims to extract, analyze, and store ice cores from worldwide retreating glaciers. One of the selected sites is the last remaining ice body in the Apennines, the Calderone Glacier. To assess the most suitable drilling position, geophysical surveys were performed. Reliable ground penetrating radar measurements have been positively combined with a geophysical technique rarely applied in glacier environments, the Frequency Domain Electro-Magnetic prospection.