Appearance of lower thermosphere and ionosphere F2 region dynamical coupling caused by tidal motions over Abastumani
Abstract
The presence of planetary scale motion characteristic variations in the Earth's upper atmosphere is shown in the intensities of the nightglow mesopause hydroxyl OH(8-3) band, the lower thermosphere oxygen green OI 557.7nm line and the ionosphere F2 region red OI 630.0 nm line, observed from Abastumani(41.75N, 42.82E). There is demonstrated the simultaneous observation for the mentioned intensities characterized by vertical propagation of 4-8 hour tidal motions, which are considered as the manifestation of the lower and upper atmosphere-ionosphere F2 layer dynamical coupling in the Caucasus region. It is shown that in the considered cases, for terdiurnal tidal motions, is possible to estimate the wavelength of the vertical propagation, which is equal to the distance between luminous layers (about 130-150 km) or its multiple values (65-75, 32-37 km). The profile of the electron content is necessary to reveal smaller wavelengths.
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