NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Integration of the Radiation Belt Environment Model Into the Space Weather Modeling FrameworkWe have integrated the Fok radiation belt environment (RBE) model into the space weather modeling framework (SWMF). RBE is coupled to the global magnetohydrodynamics component (represented by the Block-Adaptive-Tree Solar-wind Roe-type Upwind Scheme, BATS-R-US, code) and the Ionosphere Electrodynamics component of the SWMF, following initial results using the Weimer empirical model for the ionospheric potential. The radiation belt (RB) model solves the convection-diffusion equation of the plasma in the energy range of 10 keV to a few MeV. In stand-alone mode RBE uses Tsyganenko's empirical models for the magnetic field, and Weimer's empirical model for the ionospheric potential. In the SWMF the BATS-R-US model provides the time dependent magnetic field by efficiently tracing the closed magnetic field-lines and passing the geometrical and field strength information to RBE at a regular cadence. The ionosphere electrodynamics component uses a two-dimensional vertical potential solver to provide new potential maps to the RBE model at regular intervals. We discuss the coupling algorithm and show some preliminary results with the coupled code. We run our newly coupled model for periods of steady solar wind conditions and compare our results to the RB model using an empirical magnetic field and potential model. We also simulate the RB for an active time period and find that there are substantial differences in the RB model results when changing either the magnetic field or the electric field, including the creation of an outer belt enhancement via rapid inward transport on the time scale of tens of minutes.
Document ID
20110010985
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Glocer, A.
(Michigan Univ. MI, United States)
Toth, G.
(Michigan Univ. MI, United States)
Fok, M.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Gombosi, T.
(Michigan Univ. MI, United States)
Liemohn, M.
(Michigan Univ. MI, United States)
Date Acquired
August 25, 2013
Publication Date
January 1, 2009
Publication Information
Publication: Journal of Atmospheric and Solar-Terrestrial Physics
Publisher: Elsevier
Volume: 71
Issue: 16
Subject Category
Geophysics
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available