SIMULATION OF TRANSPOLAR POTENTIAL SATURATION FOR NORTHWARD IMF

Details SIMULATION OF TRANSPOLAR POTENTIAL SATURATION FOR NORTHWARD IMF SIMULATION OF TRANSPOLAR POTENTIAL SATURATION FOR NORTHWARD IMF

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm33a1558b&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM33A-1558

Physics

[2736] Magnetospheric Physics / Magnetosphere/Ionosphere Interactions, [2753] Magnetospheric Physics / Numerical Modeling, [2776] Magnetospheric Physics / Polar Cap Phenomena

Scientific paper

When the Interplanetary Magnetic Field (IMF) is strongly southward, the potential across the ionosphere reaches a saturation value and does not increase substantially, even if the IMF becomes much more strongly negative. Recent observations have indicated that the same thing happens for strongly northward IMF. We will present global MHD simulations of this phenomenon using the Lyon-Fedder-Mobarry simulation code and make comparisons to oservations from the DMSP spacecraft. We also will show that the behavior of the saturation effect is consistent with a recent explanation for saturation based on the forces on the flow in the magnetosheath.

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