Jun 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jatp...43..387r&link_type=abstract
(International Symposium on Equatorial Aeronomy - I, 6th, Aguadilla, PR, July 17-23, 1980.) Journal of Atmospheric and Terrestri
Physics
65
Dynamo Theory, Equatorial Atmosphere, F Region, Ionospheric Currents, Electric Fields, Geomagnetism, Ionospheric Conductivity, Lines Of Force, Polarization (Charge Separation)
Scientific paper
The theory of the F-region dynamo, whose driving force is the thermospheric wind system produced by the pressure inequalities due to solar EUV heating, is reviewed. The dynamo drives about 10-15% of the total midlatitude ionospheric current by day and over 50% by night. Polarization fields associated with the dynamo are discussed, noting that they cause marked effects in the nighttime F-region. The theory leans heavily on the assumption that geomagnetic field lines are equipotentials and that currents flow freely along them. A brief discussion is also presented on the location of the lunar current flow, and the view that the tidal current flows mainly in the E-region by day (even though the F-region carries most of the much smaller nighttime current) is supported both qualitatively and quantitatively.
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