Physics
Scientific paper
Mar 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.1499d&link_type=abstract
Journal of Geophysical Research, vol. 86, Mar. 1, 1981, p. 1499-1512.
Physics
235
Atmospheric Circulation, Atmospheric Models, Atmospheric Temperature, Temperature Distribution, Thermosphere, Three Dimensional Models, Atmospheric Heating, Equinoxes, Extreme Ultraviolet Radiation, Hydrostatics, Perturbation Theory, Solar Radiation
Scientific paper
A thermospheric general circulation model is used to calculate the global neutral gas temperature distribution and circulation of the thermosphere for equinox and solstice conditions. The calculated diurnal variation of temperature at equinox is 210 K with solar heating appearing to account for most of the diurnal temperature amplitude. The semidiurnal variations of winds and temperature are as large as the diurnal variations in the lower thermosphere, but are a factor of 3 or more less than observed. The model achieves diurnal reproducibility within 5 days with no apparent hydrodynamic instabilities of the large-scale motions, suggesting that the observed variability is probably due to variations in heat and momentum sources that result from neutral-plasma interactions and wave coupling with the lower atmosphere.
Dickinson Robert E.
Ridley E. C.
Roble Raymond G.
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