On gravity wave induced Brunt-Vaisala oscillations

Details On gravity wave induced Brunt-Vaisala oscillations On gravity wave induced Brunt-Vaisala oscillations

Feb 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84..393t&link_type=abstract

Journal of Geophysical Research, vol. 84, Feb. 1, 1979, p. 393-398.

Physics

Airglow, Atmospheric Models, Gravity Waves, Ionospheric Disturbances, Oscillations, Hydrostatics, Nonlinearity, Oxygen Spectra, Resonant Frequencies, Self Excitation

Scientific paper

Airglow oscillations (mostly 5577-A oxygen emission) which show a short-period (4-10 min) oscillation superimposed on a long-period oscillation (several hours) have frequently been observed. Some data show that the short-period oscillation is 'excited' by the long-period oscillation as the latter increases in amplitude. The effects often occur in the absence of impulsive energy sources. A model is proposed in which the short-period oscillation is relatively localized and is associated with the natural (Brunt-Vaisala) oscillation of the atmosphere. This oscillation is triggered off by a long-period gravity wave through parametric excitation and nonlinear coupling.

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