Journal ArticleDOI
Acoustic‐gravity waves in the upper atmosphere
Kung C. Yeh,Chao H. Liu +1 more
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In this article, the authors review the theory of acoustic-gravity waves, the interaction of such waves with the ionosphere, the experimental support for the existence of acoustic gravity waves in the upper atmosphere, and the role played by acoustic gravity wave in thermospheric dynamics.Abstract:
In this paper we review the theory of acoustic-gravity waves, the interaction of such waves with the ionosphere, the experimental support for the existence of such waves in the upper atmosphere, and the role played by acoustic-gravity waves in thermospheric dynamics. After a thorough discussion on the properties of acoustic-gravity waves in an ideal isothermal atmosphere, the effects produced by horizontal winds, sharp boundary discontinuities, and dissipative processes are discussed. The generation of these waves by stationary or moving sources is then treated. It is shown that the atmospheric response to a stationary impulse source can be described by the emission of three waves: acoustic, buoyancy, and gravity. These discussions are then followed by reviewing propagation effects in a realistic atmosphere for both free waves and guided waves. Recent numerical results are given. When acoustic-gravity waves propagate through the ionosphere, interaction between the wave and the ionosphere will take place. The physical processes involved in such an interaction are examined.read more
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Atmospheric gravity waves generated in the high‐latitude ionosphere: A review
TL;DR: A review of theoretical and observational results describing atmospheric gravity wave (AGW)/traveling ionospheric disturbance (TID) phenomena at high latitudes is presented in this paper.
Journal ArticleDOI
Gravity wave saturation in the middle atmosphere: A review of theory and observations
TL;DR: A review of recent advances in the understanding of gravity wave saturation in the middle atmosphere can be found in this article, where a brief discussion of the studies leading to the identification of the gravity wave effects and their role in middle atmosphere dynamics is presented.
Journal ArticleDOI
Global propagation of atmospheric gravity waves: A review
TL;DR: The theoretical and observational evidence concerning the global propagation of atmospheric gravity waves is reviewed in this article, with special emphasis on the waves generated in the auroral zones, and it is concluded that the only natural sources of large-scale TIDs are in the ionospheric zones.
Journal ArticleDOI
Gravity wave initiation of equatorial spread F: A case study
TL;DR: In this article, the authors show that although initiation by a gravity wave seems likely, the gravity wave interaction cannot yield the large displacements observed without further amplification by the Rayleigh-Taylor instability.
References
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Journal ArticleDOI
Internal atmospheric gravity waves at ionospheric heights
TL;DR: In this paper, the proper interpretation of irregular motions in the upper atmosphere has been investigated by a variety of techniques, but their proper interpretation has yet to be established. But their proper meaning has not yet been established.
Book
The propagation of electromagnetic waves in plasmas.
TL;DR: In this paper, an open-diagram technique is introduced which simplifies the calculation of absorptive parts of the conductivity tensor for long-wavelength electromagnetic waves in uniform, weakly interacting plasmas near equilibrium in the absence of external magnetic fields.
Book
Introduction to ionospheric physics
Henry Rishbeth,Owen K. Garriott +1 more
TL;DR: In this article, a book on ionospheric physics covering neutral atmosphere and photochemical processes, morphology, phenomena, geomagnetism, storms and geomagnetic storms is presented.