Physics
Scientific paper
Jul 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jatp...43..663b&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 43, July 1981, p. 663-674.
Physics
44
Annual Variations, Atmospheric Circulation, Atmospheric Tides, Mesosphere, Atmospheric Turbulence, Autocorrelation, Coupled Modes, Group Velocity, Stratospheric Warming, Wind Direction
Scientific paper
Variability of the semidiurnal tide is described as a composition of three effects, including main tide variations over scales larger than five days, short time-scale variations due to local effects, and longitudinal variations related to nonsolar migrating modes. Coupling mechanisms related to background atmospheric structure are found necessary to explain large scale variations, and a simplified coupling mechanism to extend coupling to nonsolar migrating modes is developed. Longitudinal effects on short time-scale variability make difficult the establishment of a direct relationship between tidal and middle atmosphere variations. In addition, simultaneous observations of tides at differing longitudes over a long period of time would be needed to separate time and longitude effects, and to trace the migration of the stratospheric warming.
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