HR: 1340h
AN: SM43A-1150    [Abstracts]
TI: Modeling kinetic particle effects in the inner magnetosphere during a magnetic storm
AU: * El-Alaoui, M
EM: mostafa@igpp.ucla.edu
AF: UCLA-IGPP, 405 Hilgard Ave, Los Angeles, CA 90095-1567, Los Angeles, CA 90095-1567 United States
AU: Richard, R L
EM: rrichard@igpp.ucla.edu
AF: UCLA-IGPP, 405 Hilgard Ave, Los Angeles, CA 90095-1567, Los Angeles, CA 90095-1567 United States
AU: Ashour-Abdalla, M
EM: mabdalla@igpp.ucla.edu
AF: UCLA-IGPP, 405 Hilgard Ave, Los Angeles, CA 90095-1567, Los Angeles, CA 90095-1567 United States
AU: Chen, M W
EM: Margaret.W.Chen@aero.org
AF: Aerospace Corporation, Space Science Applications Laboratory, M2-260, The Aerospace Corporation, P. O. Box 92957, Los Angeles, CA 90009 United States
AB: The interaction of the solar wind with the Earth's geomagnetic field leads to dynamic current and pressure distributions in the inner magnetosphere. Modeling the inner magnetosphere during a storm is accomplished by a combination of three techniques: global MHD simulations of the magnetosphere and its interaction with the solar wind, particle tracing calculations and drift-kinetic ring current simulations. Each approach captures different aspects of the physical process. MHD simulations do not include complete particle drifts and underestimate pressure in the inner magnetosphere. The ring current simulations produce detailed phase space densities and showed the highest pressure within a simplified magnetospheric model. Particle tracing calculations do not yet have adequate statistics to obtained detailed distribution function. We will present analyses of events based on these approaches and will present results of our efforts to unify the three approaches. We will consider observed moderate storm events; comparing the plasma pressure distribution in the inner magnetosphere from the MHD result to observed storm intervals. This will allow us to quantify the contributions of particles in the inner magnetosphere.
DE: 2740 Magnetospheric configuration and dynamics
DE: 2744 Magnetotail
DE: 2778 Ring current
DE: 2788 Storms and substorms
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting