Deep geoelectrical structure estimation in the West Antarctic

Geomagnetic data from the Polish Antarctic Station Arctowski were analyzed to estimate the geoelectrical mid mantle structure for the West Antarctic. Response functions were obtained at periods from 11 to 65 days by using Dst variations. The original inversion in the spherical geometry was applied to establish the 1D structure. This first deep geoelectrical sounding in the Antarctic has shown the existence of a mid mantle conductive layer, of 850 kS conductance, at a depth of about 700 km. This result has confirmed the idea of the global character of that layer over the Earth.