Immanuil Kant Baltic Federal University
STUDY OF THE METEOROLOGICAL PROCESSES INFLUENCE ON THE UPPER ATMOSPHERE AND IONOSPHERE: SIMULATION AND EXPERIMENT
Authors: Olga Borchevkina Immanuel Kant Baltic Federal University
Ivan Karpov Immanuel Kant Baltic Federal University, WD IZMIRAN
Pavel Vasiliev Immanuel Kant Baltic Federal University
Fedor Bessarab Immanuel Kant Baltic Federal University, WD IZMIRAN
Alexandra Ilminskaya Immanuel Kant Baltic Federal University
Structure and dynamics of the upper atmosphere, mainly caused by extraterrestrial sources, including the sun. Nevertheless, the impact coming from below also provides a significant contribution to the variability of the upper atmosphere. One of the widely discussed phenomena - meteorological activities in the troposphere. Meteorological processes in the troposphere are a source of strong internal waves wide spectral period, which carry energy and momentum up through the atmosphere.
Analysis of the experimental data from observations of the total electron content and pressure shows that the meteorological storm influence on the ionospheric parameters. It was found that the effects of meteorology appear in the ionosphere in the form of local areas of reducing the electron density. Statistical methods of analysis of the dynamics of the ionosphere indicated that ionospheric disturbances are not the random processes.
Results of the analysis of ionospheric observations have shown that during periods of meteorological disturbances decrease in the amplitude of the diurnal variations TEC, reaching about 50% in relation to meteorological calm days. The variations in the critical frequency of the F-region of the ionosphere observed decrease in the amplitude of the diurnal variations in the ~ 15%, and the emergence periods manifestations F - scattering.
The observation of TEC variation in meteorological activity also reveals increasing variations of parameters of the ionosphere with periods of 2-20 minutes. Analysis ionospheric data suggests that the disturbance identified by ionospheric conditions determined by the local meteorological conditions.
Numerical experiment was made to test the hypothesis using global self-consistent model of the thermosphere, ionosphere and protonosphere (GSM TIP). As thermospheric source of disturbance was defined spatially localized moving heat source, simulating the effect of AGW dissipation, connected with meteorological storm. The calculation results demonstrate the dynamics of perturbations of the upper atmosphere and ionosphere parameters caused by the source model. The physical processes that determine the resulting ionospheric disturbances are discussed.