Physics
Scientific paper
Oct 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.8241m&link_type=abstract
Journal of Geophysical Research, vol. 87, Oct. 1, 1982, p. 8241-8254.
Physics
19
Geomagnetism, Ionospheric Currents, Magnetic Variations, Polar Regions, Solar Activity Effects, Solar Terrestrial Interactions, Current Distribution, Diurnal Variations, Dynamo Theory, Field Aligned Currents, Geomagnetic Latitude, International Geophysical Year, Ionospheric Conductivity, Solar Wind
Scientific paper
Equivalent ionospheric current systems of the solar daily geomagnetic variations in both high and mid-low latitudes during a solar active period are estimated for three seasons and the yearly average, and are compared with those during a solar quiet period. Field-aligned electric currents as well as the wind dynamo effects that produce the obtained electric current systems are examined. Since unreasonably large electric conductivity or wind speed is required to simulate the polar currents by the wind dynamo, it is concluded that field-aligned currents play a basic role in producing the current systems at high latitudes.
Matsushita Satoki
Xu Wen-Yao
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