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Disturbances of the upper atmosphere and ionosphere caused by acoustic-gravity wave sources in the lower atmosphere

  • Chemical Physics of Atmospheric Phenomena
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Abstract

The results of observations of acoustic-gravity waves in the troposphere and the ionosphere at middle latitudes during periods of passage of the solar terminator are presented. Tropospheric observations were performed using a lidar. The frequency characteristics of variations of the tropospheric parameters are determined based on observations of the intensity of the scattered lidar signal. The characteristics of variations of the total electron content (TEC) in the atmosphere are determined from data collected by GPS navigation satellites. An analysis of the observational data showed that the spectrum of variations of the atmospheric and ionospheric parameters is indicative of acoustic-gravity waves (AGW) propagating from the lower atmosphere. Modeling studies of the vertical propagation of AGW from the Earth’s surface showed that such waves quickly (within ~15 min) reach altitudes of the upper atmosphere (~300 km). The refraction and dissipation of waves in the upper atmosphere produces perturbations of the background state of the atmosphere and gives rise to the waveguide propagation of infrasonic wave components. The observed manifestations of TEC disturbances caused by AGW propagating from the lower atmosphere can be explained by the diurnal variation of the altitude of the ionosphere and the waveguide propagation of infrasonic waves.

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Correspondence to I. V. Karpov.

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Original Russian Text © I.V. Karpov, S.P. Kshevetsky, O.P. Borchevkina, A.V. Radievsky, A.I. Karpov, 2016, published in Khimicheskaya Fizika, 2016, Vol. 35, No. 1, pp. 59–64.

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Karpov, I.V., Kshevetsky, S.P., Borchevkina, O.P. et al. Disturbances of the upper atmosphere and ionosphere caused by acoustic-gravity wave sources in the lower atmosphere. Russ. J. Phys. Chem. B 10, 127–132 (2016). https://doi.org/10.1134/S199079311601005X

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  • DOI: https://doi.org/10.1134/S199079311601005X

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