Short gravity wave periodicities during AIDA

Details Short gravity wave periodicities during AIDA Short gravity wave periodicities during AIDA

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jatp...55..341k&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 55, no. 3, p. 341-354.

Physics

4

Airglow, Gravity Waves, Hydroxyl Emission, Luminous Intensity, Oxygen Afterglow, Wavelengths, Atmospheric Stratification, Photometers, Rotational Spectra, Thermosphere

Scientific paper

During the AIDA campaign in Puerto Rico 1-12 April 1989, the intensities of four airglow emissions were monitored: 557.7 nm (OI), 589.3 nm (Na doublet), 630.0 nm (OI) and 732.5 nm (OH 8-3). Various average brightnesses are reported. We present a summary of the periodicities from one minute to one hour observed in the three emissions originating from the lower thermosphere, based on 36 h of observing time. The periods show a preference for shorter time scales, and there is a noticeable midnight minimum in wave activity, although not in brightness level. Detailed data on 19 well-defined periodicities are presented. Evidence is also presented to indicate that when a disturbance was present simultaneously in more than one airglow layer, its period was usually somewhat longer in emission layers at higher altitudes.

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