Physics
Scientific paper
May 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.1905h&link_type=abstract
Journal of Geophysical Research, vol. 84, May 1, 1979, p. 1905-1913.
Physics
10
Night Sky, Nocturnal Variations, Polar Meteorology, Thermosphere, Winds Aloft, Alaska, Atmospheric Models, F Region, Meridional Flow, Radio Meteorology, Three Dimensional Models
Scientific paper
The average nighttime thermospheric wind variations measured near College, Alaska are analyzed in order to determine the effectiveness of various forces in controlling high latitude thermospheric winds. The zonal and meridional components of the neutral wind at F region heights were determined by the Doppler shift of the 6300 A oxygen airglow measured by a Fabry-Perot interferometer. The data obtained in conjunction with a three dimensional dynamic thermospheric model are used to show that the ion drag force is essentially balanced by the pressure force in the meridional direction, however not in the zonal direction. Pressure gradients derived in terms of exospheric temperature variations show a different nighttime variation from that predicted by the model. The derived zonal winds are found to be opposite in direction from those calculated from a dynamic model using pressure forces determined from the given semiempirical model and ion drag.
Hays Paul B.
Meriwether W. Jr. J.
Roble Raymond G.
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