Study on Characteristics of the Ionospheric Conductivity in the Polar Region

Based on the theory of ionospheric conductivity and the international reference ionosphere model (IRI-2007), the Pedersen and Hall conductivity change in different phases of the solar cycle during quiet geomagnetic activity was discussed. Meanwhile, because the International Reference Ionosphere model does not reflect the polar ionospheric conductivity very well during the geomagnetic storm. So applied the average energy and the energy flux of the precipitating electrons, the relation between the conductivity and the average energy and the energy flux of the precipitating particles under different energy spectrum function and the geomagnetic activity was analyzed. The results show that the variation of the ionosphric conductivity is good consistent with the change of the field-aligned currents in the polar region, and at the same time, it influenced by the solar activity and the geomagnetic substorm.