Validation of the Space Weather Modeling Framework for Northward IMF Conditions

Details Validation of the Space Weather Modeling Framework for Northward IMF Conditions Validation of the Space Weather Modeling Framework for Northward IMF Conditions

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsm42a..01t&link_type=abstract

American Geophysical Union, Spring Meeting 2005, abstract #SM42A-01

Physics

2730 Magnetosphere: Inner, 2736 Magnetosphere/Ionosphere Interactions, 2740 Magnetospheric Configuration And Dynamics, 2744 Magnetotail, 2753 Numerical Modeling

Scientific paper

We have simulated the magnetosphere and the ionosphere for an extended period of northward interplanetary magnetic field (IMF) conditions that occurred between 17:00 UT October 22 2003 and 00:00 UT October 24 2003. The Space Weather Modeling Framework (SWMF) is run with the coupled global magnetosphere (BATSRUS), inner magnetosphere (RCM) and ionosphere electro-dynamics (Ridley) components. The simulation results are compared with the magnetic field measurements of the GOES 10, GOES 12, Polar, Wind and Geotail satellites, and with the density, temperature, magnetic field and velocity measured by the Cluster satellites. We examine the effects of the grid resolution, Joule heating, resistivity, and coupling with the Inner Magnetosphere. It is found that the coupling with the RCM significantly improves the agreement between the observed and simulated magnetic fields near the Earth. In order to better match the far-tail Wind observations, resistivity needs to be added to the simulation. This indicates that the numerical resistivity in the code is most likely too low in the reconnection sites. In addition, it is shown that the amount of Joule heating in the reconnection site has a strong influence on the density and temperature of the plasma sheet. This series of simulations also serve as a validation of the SWMF.

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