Airglow variations and dynamics in the lower thermosphere and upper mesosphere. I - Diurnal variation and its seasonal dependency

Details Airglow variations and dynamics in the lower thermosphere and upper mesosphere. I - Diurnal variation and its seasonal dependency Airglow variations and dynamics in the lower thermosphere and upper mesosphere. I - Diurnal variation and its seasonal dependency

Dec 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jatp...38.1279f&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 38, Dec. 1976, p. 1279-1287.

Physics

10

Airglow, Atmospheric Tides, Diurnal Variations, Hydroxyl Emission, Mesosphere, Thermosphere, Annual Variations, Deuterides, Midlatitude Atmosphere, Sodium Hydrides, Tidal Waves

Scientific paper

An attempt was made to examine the relationship of the diurnal variations of the 5577 A forbidden OI, NaD and OH-band airglow emissions with the upper atmospheric dynamics. A structure function analysis was made to find predominant periods of the variations of the emission intensities. The results show the presence of a prevailing semidiurnal variation in the 5577 A intensity at middle latitudes. Characteristics of the seasonal dependency in both amplitude and phase of this semidiurnal oscillation, computed by the method of least square, are in good agreement with those of the solar semidiurnal tidal wind in the meteor region. This suggests that the solar semidiurnal tide may be the main cause for the diurnal variation of the 5577 A emission at middle latitudes. The diurnal variations of the NaD, OH-band and 5577 A emissions are discussed in relation to the dynamical characteristics of the solar tidal waves around the base of the thermosphere.

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