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Detailed Reference Information |
Fujita, S., Tanaka, T. and Motoba, T. (2005). A numerical simulation of the geomagnetic sudden commencement: 3. A sudden commencement in the magnetosphere-ionosphere compound system. Journal of Geophysical Research 110: doi: 10.1029/2005JA011055. issn: 0148-0227. |
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Global plasma flow convections in the magnetosphere and in the ionosphere, field-aligned current systems, ionospheric currents, conversion between plasma internal energy and electromagnetic energy, and plasma population regimes are in a self-consistent state in the steady magnetosphere-ionosphere region. This system is called the magnetosphere-ionosphere compound system (Tanaka, 2003). In the context of the compound system, a geomagnetic sudden commencement (SC) is interpreted in terms of transition from the state in the pre-SC period to that in the post-SC period. The state transition is featured with the SC transient cell convection and the transient, small-scale pressure enhancement in the magnetosphere. It is noted that destroy and recovery of the global self-consistency are associated with formation and extinction of these transient phenomena. The transition phase is also characterized with transiently enhanced field-aligned current in the ionosphere. These features commonly appear in the state transition phenomena like the theta aurora that is invoked by a sudden change of the By component of the solar wind magnetic field. This paper also discusses that a SC is terminated with recovery of the Region 2 current. |
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Abstract |
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Keywords
Magnetospheric Physics, Magnetosphere/ionosphere interactions, Magnetospheric Physics, Magnetospheric configuration and dynamics, Magnetospheric Physics, Field-aligned currents and current systems, Magnetospheric Physics, Solar wind/magnetosphere interactions, Magnetospheric Physics, Numerical modeling, magnetosphere-ionosphere compound system, state transition, SC, sudden commencement, numerical simulation |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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