HR: 1340h
AN: SM33A-1102    [Abstracts]
TI: Simulation of the 18 April 2002 Sawtooth Event Using the Rice Convection Model
AU: * Yang, J
EM: jianyang@rice.edu
AF: Department of Physics and Astronomy, Rice University, MS108,6100 Main St., Houston, TX 77005, United States
AU: Toffoletto, F
EM: toffo@rice.edu
AF: Department of Physics and Astronomy, Rice University, MS108,6100 Main St., Houston, TX 77005, United States
AU: Wolf, R
EM: rawolf@rice.edu
AF: Department of Physics and Astronomy, Rice University, MS108,6100 Main St., Houston, TX 77005, United States
AU: Sazykin, S
EM: sazykin@rice.edu
AF: Department of Physics and Astronomy, Rice University, MS108,6100 Main St., Houston, TX 77005, United States
AU: Brandt, P
EM: pontus.brandt@jhuapl.edu
AF: Johns Hopkins University Applied Physics Laboratory, Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723-6099, United States
AU: Henderson, M
EM: mghenderson@lanl.gov
AF: Los Alamos National Laboratory, MS D-466, Los Alamos National Laboratory, Los Alamos, NM 87545, United States
AB: We present simulation results of the 18 April 2002 sawtooth event using the Rice Convection Model (RCM) where we treat this event as a series of recurrent substorms with a period of 2-4 hours. The simulation uses the storm time magnetic field model as well as the time dependent plasma sheet model as inputs to RCM. During the substorm expansion phase, we use an empirical substorm current wedge model in order to dipolarize the magnetic field on the nightside and we deplete flux tube content on the outer boundary over a wide range of local time. The simulated energetic proton fluxes at the geosynchronous orbit show a well-defined global sawtooth pattern and the calculated ENA fluxes show that oxygen is enhanced more significantly after the substorm onset than hydrogen, which is consistent with the IMAGE/HENA observations.
DE: 2721 Field-aligned currents and current systems (2409)
DE: 2764 Plasma sheet
DE: 2778 Ring current
DE: 7959 Models
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting