Physics
Scientific paper
Oct 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jatp...43.1051c&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 43, Oct. 1981, p. 1051-1056. Research supported by the Australian Research
Physics
52
Meridional Flow, Mesopause, Oscillating Flow, Winds Aloft, Amplitudes, Annual Variations, Australia, Phase Deviation
Scientific paper
Measurements of winds from radar observations of drifting meteor trails in the region between 80 and 100 km were made at Adelaide, South Australia (35 deg S) on a regular basis from June 1966 to December 1975. Characteristics are presented of a quasi-two-day wave, a brief but regular feature in late summer. The period of oscillation is found to vary between 45 and 53, and the phase of oscillation appears to be locked relative to the sun. The oscillation has been detected over a wide range of heights throughout the mesosphere and into the lower thermosphere; the mean amplitude in January is 48 m/sec, and the phase variation with height is indicative of a wave with downward phase propagation and a vertical wavelength in excess of 100 km. Simultaneous observations at widely separated stations with similar latitudes were consistent with a westward propagating wave of zonal wave number three.
Craig R. L.
Elford Graham W.
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