Magnetosphere-ionosphere Coupling for the Steady-state Solar Wind Conditions of November 26 2000

Details Magnetosphere-ionosphere Coupling for the Steady-state Solar Wind Conditions of November 26 2000 Magnetosphere-ionosphere Coupling for the Steady-state Solar Wind Conditions of November 26 2000

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm31b0769k&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SM31B-0769

Physics

2409 Current Systems (2708), 2431 Ionosphere/Magnetosphere Interactions (2736), 2753 Numerical Modeling, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

In recent years three-dimensional magnetosphere models based on ideal Magnetohydrodynamics have become increasingly popular. In this work we use BATS-R-US, an ideal MHD model developed at the University of Michigan to simulate a particular event characterized by fairly steady solar wind conditions. November 26 2000 had several hours of steady southward IMF. This event is particularly interesting because of the unusually high solar wind parameters: the density was as high as 40 particles per cc and the magnitude of the magnetic field was about 30 nT. We consider the coupling of the magnetosphere and ionosphere and compare the ionospheric convection patterns and cross-polar cap potentials in the model with those determined from the SuperDARN network. In our simulation we reproduce the typical two-cell convection pattern in the ionosphere, however the cross-polar cap potential turns out to be somewhat too high. We discuss the possible reasons for this disagreement.

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