An Analysis of the In-Situ Resistivity of Sea Ice in Terms of its Microstructure
Abstract The results of 66 Schlumberger geoelectric soundings on first-year sea ice are analysed to obtain average values of d.c. electrical resistivity both parallel ρ 1 and perpendicular ρ p to the long brine cell direction. This analysis yields ρ 1 = 104 Ω m, 80 Ω m, 45 Ω m, and ρ p = 298 Ω m, 23...
| Published in: | Journal of Glaciology |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Cambridge University Press (CUP)
1979
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1017/s0022143000014465 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000014465 |
| Summary: | Abstract The results of 66 Schlumberger geoelectric soundings on first-year sea ice are analysed to obtain average values of d.c. electrical resistivity both parallel ρ 1 and perpendicular ρ p to the long brine cell direction. This analysis yields ρ 1 = 104 Ω m, 80 Ω m, 45 Ω m, and ρ p = 298 Ω m, 230 Ω m, 129 Ω m for brine volumes ν b of 40‰, 67‰, and 82‰ respectively. The observed dependence of ρ 1 on ν b is used in conjunction with a mixing formula for the electrical resistivity of a two-phase heterogeneous system to arrive at values of “average” brine cell lengths l for relatively warm sea ice. This treatment yields l ≈ 1.7 cm for 40‰ ≤ ν b ≤ 70‰ with a rapid extension of brine cell lengths for brine volumes above c . 70‰. |
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