The effect of atmospheric baric formations on the state of the ionospheric D-region during 1988-1989 winter

The response of electron concentration in the lower ionosphere to various atmospheric, ionospheric, and solar parameters was investigated using data on these parameters collected during 1988-1989 winter. It was found that the lower part of the ionospheric D-region (50-70 km) reacts to the disturbances that are generated in the troposphere and expand into the stratosphere, but is not influenced by the solar activity. On the other hand, solar activity had a pronounced effect in the upper D-region (75-95 km), where no interatmospheric effect was registered, until the time when a major stratospheric warming began at the end of January 1989. The electron concentration distribution in this zone was determined by the dynamic regime of the mesosphere.