Physics
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984p%26ss...32..469f&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 32, April 1984, p. 469-480. Research supported by the Science and Engineering
Physics
44
Atmospheric Circulation, Atmospheric Conductivity, Ion Density (Concentration), Ion Motion, Neutral Atmospheres, Polar Regions, Thermosphere, Convection, Earth Magnetosphere, Extreme Ultraviolet Radiation, Geomagnetism, Solar Radiation, Ultraviolet Radiation
Scientific paper
The dynamics of the high latitude thermosphere are dominated by the ion circulation pattern driven by magnetospheric convection. The reaction of the neutral thermosphere is influenced by both the magnitude of the ion convection velocity and by the conductivity of the thermosphere. Using a three-dimensional, time-dependent, thermospheric, neutral model together with different ionospheric models, the effect of changes in conductivity can be assessed. The ion density is described by two models: the first is the empirical model of Chiu (1975) appropriate for very quiet geomagnetic conditions, and the second is a modified version of the theoretical model of Quegan et al. (1982). The differences in the neutral circulation resulting from the use of these two ionospheric models emphasizes the need for realistic high latitude conductivities when attempting to model average or disturbed geomagnetic conditions, and a requirement that models should couple realistically the ionosphere and the neutral thermosphere. An attempt is made to qualitatively interpret some of the features of the neutral circulation produced at high latitudes by magnetospheric processes.
Bailey Graham J.
Fuller-Rowell Tim J.
Moffett R. J.
Quegan Shaun
Rees David
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