Other
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsh31a0381k&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SH31A-0381
Other
2114 Energetic Particles (7514), 2740 Magnetospheric Configuration And Dynamics, 2753 Numerical Modeling, 2784 Solar Wind/Magnetosphere Interactions, 7984 Space Radiation Environment
Scientific paper
During severe storms sudden changes in solar energetic particle (SEP) access to the magnetosphere are caused both by cutoff variations due to changes in the geomagnetic field configuration and by the transport and heating of ions due to the storm sudden commencement (SSC) inductive electric field pulse associated with the impact of an interplanetary shock on the magnetosphere. An accounting for both of these effects is needed to model energetic particle fluxes in the geospace environment. A numerical model is being developed that predicts SEP fluxes in the magnetosphere from an energetic particle distribution in the solar wind by computing Lorentz and guiding center test particle trajectories in time-dependent MHD magnetospheric model fields. Points in phase space are sampled using test particles weighted by an observed solar wind SEP distribution and retain their weight along particle trajectories. Fields are obtained from the Lyon-Feder-Mobarry (LFM) global MHD magnetospheric simulation code which is well suited for capturing the global dynamics of magnetic and electric fields when an interplanetary shock impacts the magnetosphere. The LFM may be run as a stand alone model or coupled with other geospace models currently in use by the Center for Intergrated Space Weather Modeling (CISM), e.g., the Rice Convection Model (RCM) which models the ring current using an adiabatic-drift formalism. A different MHD code or an empirical field model can also be implemented with the test particle code to model SEP fluxes. Here we describe some numerical techniques that have been developed for modeling energetic particle distributions in time dependent magnetospheric model fields and show some preliminary results.
Hudson Mary K.
Kress Brian T.
No associations
LandOfFree
Modeling solar energetic particle flux in the magnetosphere using global Magnetohydrodynamics does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Modeling solar energetic particle flux in the magnetosphere using global Magnetohydrodynamics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modeling solar energetic particle flux in the magnetosphere using global Magnetohydrodynamics will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-967956