The low frequency electrical properties of sea ice
Details of Research
TitleThe low frequency electrical properties of sea iceAbstractImpedance measurements were performed across the frequency range 40 Hz-1MHz on laboratory grown sea ice using a custom four-electrode capacitive cell. The measurements were performed in-situ, throughout the ice growth in horizontal and vertical orientations. Two-electrode measurements were susceptible to electrode polarization and a four-electrode measurement was required to measure the true electrical properties of the ice. A broadband mathematical model is presented which distinguishes polarization and conduction in the bulk material from space charge polarization at interfaces. The fit of this model to the impedance data gives insight into the relative contribution of these phenomena. The bulk material undergoes a dielectric relaxation and we have examined the temperature dependence of the relaxation time and susceptibility. Aspects of the susceptibility and DC conductivity can be reconciled with a conductive dielectric model in which brine is confined to regular ellipsoids. รข"' 2011 American Institute of Physics.AcknowledgementsN/A
TypeArticleCitationBuchanan, S., Ingham, M. and Gouws, G. (2011). The low frequency electrical properties of sea ice. Journal of Applied Physics, 110(7) IdentifierBuchanan2011Relevancerank3
