Abstract
The results of a numerical study of the processes of propagation into the thermosphere of internal gravity waves excited by heat sources in the troposphere are presented. The results of numerical experiments have shown that thermospheric disturbances from such sources arise ~30 min after the onset of their action. The reason for the appearance of a fast reaction of the thermosphere is the infrasonic waves excited during the generation of internal gravity waves. It is shown that the thermospheric wind significantly affects the spatiotemporal structure of wave disturbances in the upper atmosphere. This influence manifests itself in an increase in the amplitudes and a decrease in the spatial scales of waves that propagate against the thermospheric wind. For waves that propagate in the direction of the thermospheric wind, a decrease in amplitudes and an increase in spatial scales are noted.
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Funding
This work was supported by the scholarship of the President of the Russian Federation for young scientists and graduate students SP-753.2021.3 (Yu.A. Kurdyaeva: Numerical calculations, analysis and interpretation of results), grant no. 18-35-00121 from the Russian Foundation for Basic Research and the Kaliningrad Region (Karpov M.I.: Analysis and interpretation of the results) and Russian Science Foundation grant no. 21-17-00208 (Borchevkina O.P.: Preparing data for modeling).
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Kurdyaeva, Y.A., Kshevetsky, S.P., Borchevkina, O.P. et al. Wind Effects in the Thermosphere during the Propagation of Atmospheric Waves Generated by a Tropospheric Heat Source. Geomagn. Aeron. 62, 453–459 (2022). https://doi.org/10.1134/S0016793222040119
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DOI: https://doi.org/10.1134/S0016793222040119