Coupling RAM-SCB to a Magnetospheric GCM and Polar Wind Outflow Model

Details Coupling RAM-SCB to a Magnetospheric GCM and Polar Wind Outflow Model Coupling RAM-SCB to a Magnetospheric GCM and Polar Wind Outflow Model

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm13c1617w&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM13C-1617

Physics

[2431] Ionosphere / Ionosphere/Magnetosphere Interactions, [2730] Magnetospheric Physics / Magnetosphere: Inner, [2753] Magnetospheric Physics / Numerical Modeling, [2778] Magnetospheric Physics / Ring Current

Scientific paper

The Ring current Atmosphere interaction Model with Self-Consistently calculated 3D Magnetic field (RAM-SCB) has been used to successfully study inner magnetosphere dynamics during different solar wind and magnetosphere conditions. Historically, this numerical model has relied on empirical formulations to provide magnetic field boundary conditions, ionospheric electric potential, and to specify heavy ion content at the outer boundary. Either empirical models or observations typically specify plasma density at the boundary. Recently, RAM-SCB has been integrated into the Space Weather Modeling Framework, a flexible system that creates real time, two-way coupling between RAM-SCB, the multi-species version of BATS-R-US global MHD and the Polar Wind Outflow Model. Through these couplings, RAM-SCB receives first-principle derived magnetic and plasma boundary conditions from the SWMF and returns inner magnetosphere plasma pressure to correct the MHD solution. This paper summarizes the methodology used and presents simulation results of magnetospheric storms using the coupled codes. The impact of the coupling, especially the delivery of heavy ionospheric ions to RAM-SCB, on plasma pressure, energy density, and anisotropy in the inner magnetosphere are explored. Data-model comparisons are used to investigate how well the coupled system represents real world conditions.

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