Structure in the lambda 557.7 nm forbidden O I airglow

Details Structure in the lambda 557.7 nm forbidden O I airglow Structure in the lambda 557.7 nm forbidden O I airglow

Jan 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jatp...41...25f&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 41, Jan. 1979, p. 25-31.

Physics

3

Airglow, Oxygen Spectra, Atmospheric Chemistry, Atmospheric Models, Atmospheric Turbulence, Drift Rate, Error Analysis, Gravity Waves, Power Spectra, Reaction Kinetics, Troposphere

Scientific paper

The application of a four field photometer for study of structure in the airglow is described. Records of the lambda 557.7 nm forbidden O I emission from the 95 km level frequently show quasi-periodic structures. Drift velocities of these structures, typically in the range 50 to 100 m/s, differ in magnitude and direction from wind velocities inferred from Doppler shift of the emission line measured with a Fabry-Perot interferometer. The power spectrum of the intensity fluctuations typically cuts off at a period of about 4 min, consistent with the hypothesis that gravity waves are a major cause of the structure. On one night much shorter periods were observed; these were attributed to turbulence generated in the major fluctuations iwth periods of tens of minutes are due to gravity waves generated in the vicinity of tropospheric fronts.

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