Physics
Scientific paper
Dec 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974jgr....79.5273b&link_type=abstract
Journal of Geophysical Research, vol. 79, Dec. 1, 1974, p. 5273-5285.
Physics
6
Annual Variations, Ionospheric Disturbances, Ionospheric Temperature, Latitude, Solar Cycles, Thermosphere, Atmospheric Density, Atmospheric Heat Budget, Atom Concentration, Ionospheric Composition, Northern Hemisphere, Southern Hemisphere, Wind (Meteorology)
Scientific paper
A large volume of data (temperatures, densities, concentrations, winds) has been accumulated showing that in addition to seasonal changes in the thermosphere, annual variations are present and have a component that is a function of latitude. It appears that the helium concentrations have much larger variations in the southern hemisphere than in the northern hemisphere; the same holds true for the exospheric temperatures deduced from Ogo 6 data. The bulge of density tends to stay over the southern hemisphere, whereas winds show a tendency to blow northward across the equator. More energy seems to be available for the thermosphere in the southern hemisphere during the equinoxes; this may be the result of an asymmetry in the geomagnetic field or an asymmetrical dissipation of tidal waves induced by an asymmetrical worldwide ozone distribution.
Barlier François
Bauer Paul
Jaeck C.
Kockarts Gaston
Thuillier Gerard
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