The effects of severe troposphere weather on ionosphere on the Baltic region

The results of observations and modeling of the ionosphere parameters in periods of the severe troposphere weather events in October 2017, 2018 are presented. We analyze variations in the F2-layer critical frequency (foF2), in the total electron content (TEC), in the sporadic E-layer critical frequency during meteorology disturbances in the troposphere. It was shown that the meteorology storms can influence on the ionosphere parameters through the gravity waves (GWs). The GWs generated in the meteorology storm area can propagate into upper atmosphere and ionosphere. The GWs dissipation leads to the formation of disturbances in the thermospheric state at spatial scales that are determined by the duration and spatial dimensions of the region located in the meteorological disturbance zone. To interpret the observed disturbances in the upper atmosphere, the experimental measurements are compared with the results of model calculations obtained with the Global Self-Consistent Model of Thermosphere— Ionosphere—Protonosphere (GSM TIP).