Physics
Scientific paper
Aug 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jatp...37.1099l&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 37, Aug. 1975, p. 1099-1108.
Physics
2
Acoustic Propagation, Gravity Waves, Thermosphere, Transfer Functions, Upper Atmosphere, Wave Excitation, Atmospheric Models, Atmospheric Temperature, Propagation Modes, Transient Response, Wind (Meteorology)
Scientific paper
The response of the upper atmosphere due to the excitation of acoustic-gravity waves by various sources is studied under realistic thermospheric conditions. Losses due to viscosity, thermal conduction and ion drag as well as the effects of vertical temperature variations and winds are all taken into account. The general solution is obtained in terms of the eight characteristic wave modes that propagate in the atmosphere. An atmospheric transfer function is defined which determines the response of the upper atmosphere due to general sources. It is found that the transfer functions are peaked in the wave-number space indicating strong filtering effects, and that their behavior is affected by the background winds. The transfer functions are then applied to obtain some transient responses of the atmosphere due to excitations. The results are found to differ substantially from those obtained for a lossless, isothermal atmosphere.
Klostermeyer Juergen
Liu Chang-Hong
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