Winter stratospheric warmings and their influence on the temperature regime in the lower ionosphere

An analysis is presented of the relationship between the temperature conditions in the D layer of the ionosphere and the intensity of winter stratospheric warmings in different geographic regions, namely, high latitudes and midlatitudes in the Northern Hemisphere and high latitudes in the Southern Hemisphere. The relationships between the temperatures in the stratosphere and mesosphere and the parameters' transmission coefficient, defraction coefficient, and the phase of the two-year equatorial circulation cycle are considered. The temperature conditions in the stratosphere and mesosphere are found to be controlled by the quasi-two-year cycle of the equatorial circulation, which is connected with the intensity of winter stratospheric warmings.