Generation of infrasonic waves by low-frequency dust acoustic perturbations in the Earth's lower ionosphere
- Russian Academy of Sciences, Institute of Geosphere Dynamics (Russian Federation)
It is shown that, during Perseid, Geminid, Orionid, and Leonid meteor showers, the excitation of low-frequency dust acoustic perturbations by modulational instability in the Earth's ionosphere can lead to the generation of infrasonic waves. The processes accompanying the propagation of these waves are considered, and the possibility of observing the waves from the Earth's surface is discussed, as well as the possible onset of acoustic gravitational vortex structures in the region of dust acoustic perturbations. The generation of such structures during Perseid, Geminid, Orionid, and Leonid meteor showers can show up as an increase in the intensity of green nightglow by an amount on the order of 10% and can be attributed to the formation of nonlinear (vortex) structures at altitudes of 110-120 km.
- OSTI ID:
- 21399996
- Journal Information:
- Plasma Physics Reports, Vol. 34, Issue 6; Other Information: DOI: 10.1134/S1063780X08060032; Copyright (c) 2008 Pleiades Publishing, Ltd.; ISSN 1063-780X
- Country of Publication:
- United States
- Language:
- English
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