Physics
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jatp...46..383j&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 46, April 1984, p. 383-387.
Physics
6
Ionospheric Currents, Midlatitude Atmosphere, Sporadic E Layer, Electric Fields, Electron Mobility, Ionic Mobility, Northern Hemisphere
Scientific paper
The current-carrying properties of mid-latitude type sporadic E-layers are investigated in some simple cases involving the presence of either a neutral wind or an electric field. It is shown that, in the Northern Hemisphere, the layer current is directed towards magnetic south, provided the height profile of the neutral wind is a left-handed screw with a sufficiently small pitch. If the pitch is high or the screw is right-handed, the current flows northwards. A northward current is also expected in layers created by electric fields alone. It is further pointed out that the current driven by a neutral wind is carried merely by ions, while that due to an electric field is carried by electrons. Finally, the conducting properties of the layers are investigated in terms of a 2 x 2 conductivity tensor.
Jalonen L.
Nygrén T.
Oksman J.
Turunen Tauno
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