Influence of Ionospheric Conductances on Magnetosphere Structure and Dynamics

Details Influence of Ionospheric Conductances on Magnetosphere Structure and Dynamics Influence of Ionospheric Conductances on Magnetosphere Structure and Dynamics

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsm71b..03r&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SM71B-03

Other

2431 Ionosphere/Magnetosphere Interactions (2736), 2708 Current Systems (2409), 2730 Magnetosphere: Inner, 2753 Numerical Modeling

Scientific paper

Varying ionospheric conductances are known to draw different currents from the inner magnetosphere and can lead to vastly different electric potential patterns. Different ionospheric potentials, on the other hand, generate differences in magnetospheric convection. Thus, magnetospheric structure and dynamics can, in principle, be impacted or modified by the values of the ionospheric conductances. In order to study the dependence of the large-scale dynamics on ionospheric conductivities, we employ the two global MHD resident at the Community Coordinated Modeling Center (CCMC). The BATSRUS (U. Michigan) and the UCLA-GGCM models are run with the same real event and/or simulated conditions and varying levels of ionospheric conductances. As part of a validation of the magnetospheric models we compare the effect that different conductances have on the magnetosphere of for each of the models and compare runs with the same ionospheric parameters performed with the two models. Specifically, we will focus on magnetospheric convection and magnetic field topology.

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