HR: 1300h
AN: SM52A-0569    [PDF]
TI: Comparison of LFM Simulation With Tsyganenko Models and GOES Observations
AU: * Huang, C
EM: hcl@bu.edu
AF: Center for Space Physics, Boston University, 725 Commonwealth Avenue, Boston, MA 02215
AU: Spence, H
EM: spence@bu.edu
AF: Center for Space Physics, Boston University, 725 Commonwealth Avenue, Boston, MA 02215
AU: Kepko, L
EM: lkepko@bu.edu
AF: Center for Space Physics, Boston University, 725 Commonwealth Avenue, Boston, MA 02215
AU: Lyon, J
EM: lyon@tinman.dartmouth.edu
AF: Center for Space Physics, Boston University, 725 Commonwealth Avenue, Boston, MA 02215
AU: Goodrich, C
EM: ccg@bu.edu
AF: Center for Space Physics, Boston University, 725 Commonwealth Avenue, Boston, MA 02215
AU: Guild, T
EM: tguild@bu.edu
AF: Center for Space Physics, Boston University, 725 Commonwealth Avenue, Boston, MA 02215
AU: Wiltberger, M
EM: wiltbemj@ucar.edu
AF: NCAR/HAO, 3450 Mitchel Lane, Boulder, CO 80301
AU: Hughes, J
EM: hughes@bu.edu
AF: Center for Space Physics, Boston University, 725 Commonwealth Avenue, Boston, MA 02215
AU: Singer, H
EM: howard.singer@noaa.gov
AF: NOAA/SEC, 325 Broadway, Boulder, CO 80305
AB: The physics-based Lyon-Fedder-Mobarry (LFM) model simulates magnetospheric configuration and dynamics, but observational comparisons are needed because they can reveal possible limitations of the model and suggest ways for improvements. Here we present a study that compares the global LFM MHD simulation to two semi-empirical magnetic field models (Tsyganenko 1996 and 2001) and geosynchronous magnetic field measurements from GOES 8, 9 and 10 during storm conditions. Typical magnetic cloud events and moderate storms between 1997 and 2001 were examined. The quantitative comparison of the simulation and model predictions with observations shows very good agreement except during large storm main phases (Dst $<$ -100 nT) and typically on the night side, where the MHD simulation does not have sufficient ring current and the empirical models are poorly constrained.
DE: 2730 Magnetosphere--inner
DE: 2740 Magnetospheric configuration and dynamics
DE: 2753 Numerical modeling
DE: 2778 Ring current
DE: 2788 Storms and substorms
SC: SPA - Magnetospheric Physics [SM]
MN: 2003 Fall Meeting