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Vertical Electrical Sounding (VES) of Chukchi Sea Ice
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  • Ryan Fry,
  • Connor Parks,
  • Mark Meadows,
  • Rhett Herman
Ryan Fry
Radford University

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Connor Parks
Radford University
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Mark Meadows
Radford University
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Rhett Herman
Radford University
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Abstract

Vertical electrical sounding (VES) surveys were performed on the Chukchi Sea ice near Utqiagvik (ne’ Barrow), AK in March, 2018, using a capacitively coupled resistivity array. The purpose of this study was to determine the effectiveness of the VES method in determining the thickness of the sea ice and potentially the depth to the sea floor. The array was deployed in an atypical set-up, with the transmitter and a single receiver being moved incrementally further from a central point. The results of three trials from 2018 are presented, along with the re-analysis of data from two trials from March, 2016. The VES data were analyzed using “cumulative resistivity” plots, from which ice thicknesses were determined. Ice depths were measured by drilling through the ice at the central point of the array. The VES and drill thicknesses agree to within a few percent for the ≲1m-thick ice. The VES plots may also indicate differences in ice composition as it transitions from the solid uppermost ice down to seawater.