Simulation of the 18 April 2002 Sawtooth Event Using the Rice Convection Model

Details Simulation of the 18 April 2002 Sawtooth Event Using the Rice Convection Model Simulation of the 18 April 2002 Sawtooth Event Using the Rice Convection Model

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm33a1102y&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SM33A-1102

Physics

2721 Field-Aligned Currents And Current Systems (2409), 2764 Plasma Sheet, 2778 Ring Current, 7959 Models

Scientific paper

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.

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