Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ap%26ss..44..141s&link_type=abstract
Astrophysics and Space Science, vol. 44, Sept. 1976, p. 141-150.
Astronomy and Astrophysics
Astrophysics
Convective Flow, Earth Magnetosphere, Ionospheric Currents, Lower Ionosphere, Wind Direction, Wind Velocity, Atmospheric Circulation, Electric Fields, Ionospheric Drift, Magnetic Flux, Northern Hemisphere, Upper Atmosphere, Winter
Scientific paper
The distributions of current and neutral winds driven by the convection electric field are calculated in the dynamo region of the ionosphere. At high latitudes, the convection field drives current and wind systems which consist of two cells with centers at about 6 and 18 hours LT. In the Northern Hemisphere, winds and currents are clockwise in the dawn cells and counterclockwise in the dusk cells. The appearance of the wind system shows that the upper atmosphere moves opposite to the displacement of the ionospheric ends of the magnetic flux tubes taking part in convection. Under disturbed conditions, the calculated wind system has directions and wind velocities which are in a satisfactory agreement with data on inhomogeneity drifts in the lower ionosphere during the winter season.
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