Abstract
RECENTLY, Cowling and Borger1 have put forward theoretical reasons why the electric conductivity of the ionospheric D-region may be considerably less than that of the combined E–F-regions. On the further postulate that tidal motions increase with height in the ionosphere, they conclude that a recent deduction2 concerning the origin of the solar and lunar magnetic variations is improbable.
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References
- 1.
Cowling and Borger, Nature, 161, 515 (1948).
- 2.
Martyn, Nature, 160, 535 (1947).
- 3.
Martyn, Proc. Roy. Soc. (in the press).
- 4.
Martyn, Proc. Roy. Soc. (in the press).
- 5.
McNish, Terr. Mag. and Atmos. Elect., 42, 109 (1937).
- 6.
Cowling, Mon. Not. Roy. Ast. Soc., 93, 90 (1933).
Author information
Affiliations
Australia House, London, W.C.2. April 27.
- D. F. MARTYN
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Further reading
-
The equatorial electrojet (EEJ) current deduced from CHAMP satellite and ground magnetic measurements in West Africa
Arabian Journal of Geosciences (2017)
-
The electrical conductivity of the ionosphere: A review
Il Nuovo Cimento (1956)
-
Dynamo Currents and Conductivities in the Earth's Upper Atmosphere
Nature (1952)
-
Conductivity of the Ionosphere
Nature (1952)
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