Magnetospheric structure during substorm growth phase inferred from satellite observed pressures

Details Magnetospheric structure during substorm growth phase inferred from satellite observed pressures Magnetospheric structure during substorm growth phase inferred from satellite observed pressures

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm12a..05z&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM12A-05

Physics

[2740] Magnetospheric Physics / Magnetospheric Configuration And Dynamics, [2764] Magnetospheric Physics / Plasma Sheet, [2790] Magnetospheric Physics / Substorms

Scientific paper

To understand the onset mechanism of magnetospheric substorms one needs the ability to link disparate magnetospheric and ionospheric observations during the substorm growth phase. This connection is through mapping along magnetic field lines, however current models (either empirical or MHD) are unable to accurately describe the magnetic field during the end of a growth phase. To address this a calculation of magnetospheric equilibrium was done, using prescribed initial pressure conditions inferred from observations made by THEMIS and Geotail, to reproduce growth phase magnetic field configurations. In this presentation, we will describe these initial results obtained from the magneto-friction code and the results will be compared with equilibrium configurations obtained from the LANL 3D Euler potential equilibrium code. In addition, the global magnetospheric equilibrium calculated by the magneto-friction code could provide more realistic initial and boundary conditions to the LANL 3D code, to further improve magnetospheric equilibria.

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