Abstract It is well known that the ionosphere/thermosphere system is perturbed by acoustic-gravity waves (AGWs) as they propagate through it. At high latitudes, a primary source of AGW is the aurora. On the other hand, energy inputs of meteorological origins from the lower atmosphere are also believed to be important. For both cases, AGWs generated in the neutral atmosphere are coupled to the ionosphere, creating perturbations in density, velocity, etc. of the ionization. Therefore, the study of ionospheric perturbations due to AGWs involves the investigation of the downward coupling between the magnetosphere and the ionosphere, and the upward coupling between the middle atmosphere and the ionosphere, as well as the parallel coupling between the thermosphere and the ionosphere. Based on AGW theory, the specific features of these coupling processes will be described. Important parameters that can be used to characterize gravity wave activities will be identified. Techniques to observe and analyze these parameters will be described. The effects of AGWs on the ionosphere/thermosphere system will be discussed. Specific examples will be presented.
Acoustic gravity waves in the ionosphere/thermosphere system
Advances in Space Research ; 12 , 6 ; 187-199
1991-01-01
13 pages
Article (Journal)
Electronic Resource
English
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