DC Resistivity Measurernents on the Sea Ice near Pond Inlet, N.W.T. (Baffin Island)
Summary: Extensive dc-resistivity mcesurcrncnts were car r ied out in Mal ' and June 1972 near Pond Inlet, N, W. T. to determine th e resistivity and the anisotropy of th e sea iee. T'he sea iee proved to be transversely isotropie with regard to dc currents. The coefficient of anisotropy o...
| Main Authors: | , , , |
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| Format: | Text |
| Language: | English |
| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.472.7827 http://epic.awi.de/28035/1/Polarforsch1974_2_2.pdf |
| Summary: | Summary: Extensive dc-resistivity mcesurcrncnts were car r ied out in Mal ' and June 1972 near Pond Inlet, N, W. T. to determine th e resistivity and the anisotropy of th e sea iee. T'he sea iee proved to be transversely isotropie with regard to dc currents. The coefficient of anisotropy of undisturbed iee is approximately I. = 0,26. I, increased up to 1 in heavily disturbed parts of the ice cover. Ice thicknesses, deterrnincd fr om the dc-sounclings without taking In to account anisotropy, were tao sm al l compared with the true thicknesses determined from drilling. The average resistivity of the sea ice decreased significantly du ring the observation period according to the increase of the brine v olurn e. The conductivity of tbe ice is contr olled by this br ine content since the ice matrix h as an extremly low conductivtty. The relation between the resistivity end the br ine volume is compared with a model of conductivily in paraus medi a. |
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