Ring current modeling in a realistic magnetic field configuration

Details Ring current modeling in a realistic magnetic field configuration Ring current modeling in a realistic magnetic field configuration

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.1775f&link_type=abstract

Geophysical Research Letters, Volume 24, Issue 14, p. 1775-1778

Physics

39

Magnetospheric Physics: Energetic Particles, Trapped, Precipitating, Magnetospheric Physics: Magnetospheric Configuration And Dynamics, Magnetospheric Physics: Storms And Substorms

Scientific paper

A 3-dimensional kinetic model has been developed to study the dynamics of the storm time ring current in a dipole magnetic field. In this paper, the ring current model is extended to include a realistic, time-varying magnetic field model. The magnetic field is expressed as the cross product of the gradients of two Euler potentials and the bounce-averaged particle drifts are calculated in the Euler potential coordinates. A dipolarization event is modeled by collapsing a tail-like magnetosphere to a dipole-like configuration. Our model is able to simulate the sudden enhancements in the ring current ion fluxes and the corresponding ionospheric precipitation during the substorm expansion.

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