Generation of large-scale thermospheric disturbances and thermosphere heating by infrasonic waves propagated from tropospheric sources

Сергей Петрович Кшевецкий, Николай Михайлович Гаврилов, Иван Викторович Карпов, Ю.A. Курдяева

Research output: Contribution to journalMeeting Abstract

Abstract

Meteorological processes in the lower atmosphere are the sources of excitation of acoustic gravity waves (AGWs). Fluctuations of atmospheric pressure within a wide range of frequencies, including infrasonic frequencies are evidence of these tropospheric wave sources. We simulate numerically the propagation of waves from tropospheric infrasound sources, and our study concerns the influences of these waves on the atmosphere. Numerical experiments have shown that the small-amplitude infrasound waves can propagate without striking manifestations up to the heights of about 100 km. Only waves propagating with a rather small angle to the vertical, penetrate the thermosphere and heat the thermosphere and generate internal gravity waves. Numerical experiments have revealed that tropospheric sources with spatial scales of several kilometers, are able to create wave disturbances in the thermosphere with spatial scales from tens to one thousand kilometers. The heating effect and generation of gravity waves is significant
Original languageEnglish
Pages (from-to)4107
JournalGeophysical Research Abstracts
Volume17
Issue numberEGU2015
StatePublished - Apr 2015
EventEuropean Geosciences Union General Assembly 2015 - Vienna, Austria
Duration: 11 Apr 201516 Apr 2015
http://egu2015.eu/

Scopus subject areas

  • Earth and Planetary Sciences(all)

Keywords

  • атмосфера
  • инфразвук
  • распространение волн
  • моделирование

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