HR: 13:40h
AN: SM33B-01    [Abstracts]
TI: Model and Data Comparison of Inner Magnetosphere Plasma
AU: * Huang, C
EM: hcl@bu.edu
AF: Center for Space Physics, Boston University, Boston, MA, 725 Commonwealth Avenue Room 506, Boston, MA 02215
AU: Spence, H
EM: spence@bu.edu
AF: Center for Space Physics, Boston University, Boston, MA, 725 Commonwealth Avenue Room 506, Boston, MA 02215
AU: Friedel, R
EM: rfriedel@lanl.gov
AF: Los Alamos National Laboratory, Los Alamos, NM, 528 35th St, Los Alamos, NM 87544
AU: Lyon, J
EM: lyon@tinman.dartmouth.edu
AF: Center for Space Physics, Boston University, Boston, MA, 725 Commonwealth Avenue Room 506, Boston, MA 02215
AU: Goodrich, C
EM: ccg@bu.edu
AF: Center for Space Physics, Boston University, Boston, MA, 725 Commonwealth Avenue Room 506, Boston, MA 02215
AB: The previous study of comparison between Lyon-Fedder-Mobbary (LFM) MHD simulations and GOES data shows that the MHD simulations overestimate the magnetic fields during storm main phase especially at the nightside (Huang et al., 2003, Fall AGU meeting). The same result is shown by comparing the simulation with Polar Magnetic Field Instrument at different storm phases. To understand how the plasma distributions modify the field line configuration, we compare the particle pressure data from Polar Hydra and CAMMICE instruments with the MHD simulations. The Polar data contain full coverage of the inner magnetosphere integrated over time from 1996 to present. We use these data to construct 3-D binned plasma maps of the inner magnetosphere as a function of state parameters, such as solar wind conditions, Dst index and their time histories. This study is complementary to work done by Ebihara (2002) who used Polar MICS data to explore the storm time proton ring current. Establishing the distributions of plasma and current systems as functions of magnetospheric conditions, the goal of this study, will provide a general resource for other data/model comparisons and will ultimately help in developing higher fidelity inner magnetosphere models.
DE: 2730 Magnetosphere--inner
DE: 2778 Ring current
DE: 2788 Storms and substorms
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting