- Open Access
A 3-D current system of an ionospheric dynamo including a skin effect in an anisotropic plasma
Earth, Planets and Space volume 57, pages35–45(2005)
The numerical two-mode electromagnetic model of an ionospheric dynamo is constructed taking into account a skin effect of a field in an anisotropic plasma, i.e. a non-potential electric field of Sq-variations in the ionosphere. It is shown that a three-dimensional current system generated by the dynamo action of winds is located at altitudes less than about 200 km basically. It does not depend on an ionosphere condition in upper layers and weaker field-aligned currents between the northern and southern hemispheres practically, and an almost complete closed current circuit is generated in the dynamo layer.
Fukushima, N., Generalized theorem for no ground magnetic effect of vertical currents connected with Pedersen currents in the uniform conducting ionosphere, Rep. Ionos. Space Res. Japan, 30, 35–40, 1976.
Parkinson, W. D., Introduction to Geomagnetism, Scottish Academic Press, Edinburg & London, 1983.
Plotkin, V. V., Earth charge produced by thunderstorms, Russian Geology and Geophysics, 44, 257–264, 2003.
Richmond, A. D., M. Blanc, B. A. Emery, R. H. Wand, B. G. Fejer, R. F. Woodman, S. Ganguly, P. Amayenc, R. A. Behnke, C. Calderon, and J. V. Evans, An empirical model of quiet-day ionospheric electric fields at middle and low altitudes, J. Geophys. Res., 85, 4658–4664, 1980.
Richmond, A. D., E. C. Ridley, and R. G. Roble, A thermosphere/ionosphere general circulation model with coupled electrodynamics, Geophys. Res. Lett., 19, 601–604, 1992.
Richmond, A. D. and R. G. Roble, Electrodynamic effects of thermospheric winds from the NCAR Thermospheric General Circulation Model, J. Geophys. Res., 92, 12365–12376, 1987.
Rokityansky I. I., Geoelectromagnetic Investigations of the Earth’s Crust and Mantle, Springer-Verlag, Berlin, 1982.
Singh, A. and K. D. Cole, A numerical model of the ionospheric dynamo, J. Atmos. Terr. Phys., 49, 521–547, 1987.
Stening, R. J., Field-aligned currents driven by the ionospheric dynamo, J. Atmos. Terr. Phys., 39, 933–937, 1977.
Takeda, M., Three-dimensional ionospheric currents and field aligned currents generated by asymmetrical dynamo action in the ionosphere, J. Atmos. Terr. Phys., 44, 187–193, 1982.
Takeda, M. and M. Maeda, Three-dimensional structure of ionospheric currents. 1. Currents caused by diurnal tidal winds, J. Geophys. Res., 85, 6895–6899, 1980.
About this article
Cite this article
Plotkin, V.V. A 3-D current system of an ionospheric dynamo including a skin effect in an anisotropic plasma. Earth Planet Sp 57, 35–45 (2005). https://doi.org/10.1186/BF03351804
- Ionospheric dynamo
- skin effect
- non-potential electric field