Dependence of the response of the magnetosphere-ionosphere current systems on the preconditioning of the auroral oval and on the level of the solar-terrestrial interaction

Details Dependence of the response of the magnetosphere-ionosphere current systems on the preconditioning of the auroral oval and on the level of the solar-terrestrial interaction Dependence of the response of the magnetosphere-ionosphere current systems on the preconditioning of the auroral oval and on the level of the solar-terrestrial interaction

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990cajph..68...74r&link_type=abstract

Canadian Journal of Physics (ISSN 0008-4204), vol. 68, Jan. 1990, p. 74-80. NSERC-supported research.

Physics

10

Auroral Zones, Ionospheric Currents, Magnetosphere-Ionosphere Coupling, Solar Terrestrial Interactions, Auroral Electrojets, Geomagnetic Tail, Interplanetary Magnetic Fields, Interplanetary Medium

Scientific paper

A current system for the magnetosphere-ionosphere coupling process is described, and its response to changes in the cross polar cap potential drop is examined. The impulse response function (IRF) is discussed in terms of the traditional Rayleigh function as well as the two well-defined peaks found by Bargatze et al. (1985). While these two peaks were considered the sequential contributions of the directly driven process and the release of magnetotail energy, the bulk properties of self-inductance, capacitance and resistance are attributed here to the magnetosphere-ionosphere system. This system is applied to the coupling process. As the energy input from the solar wind changes the magnetosphere-ionosphere system, the bulk electrical parameters are changed accordingly. The consideration of the effects of releasing stored energy in the magnetotail is shown to be unnecessary for understanding the double peak in the IRF. The IRF double peak can be understood solely by considering changes in the directly driven system.

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