Physics
Scientific paper
May 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977p%26ss...25..441v&link_type=abstract
Planetary and Space Science, vol. 25, May 1977, p. 441-455. Research supported by the Australian Research Grants Committee.
Physics
10
Diurnal Variations, Gravity Waves, Mesosphere, Momentum Transfer, Thermosphere, Wind Velocity, Harmonic Analysis, Ionospheric Propagation, Radio Echoes, Vertical Distribution
Scientific paper
Intensive partial-reflection-drift observations were made at Adelaide, South Australia, for a seven-day period in June 1973. The results have been analyzed to isolate the prevailing motion and oscillations of various time scales: planetary, 24 hr, 12 hr, and gravity waves. Each is discussed in turn with particular emphasis on the variability of energy from day to day and as a function of height. Evidence is presented for the local generation of planetary waves, the presence of the evanescent S-2(1) mode in the 24-hr oscillation, the influence of the S4(2) mode in the 24-hr oscillation, and a definite polarization of gravity waves. The energies of all the forms of motion are shown to decay exponentially with increasing height. The deposition of energy and momentum in the upper mesosphere and lower thermosphere is discussed.
Stubbs Timothy J.
Vincent Anthony R.
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