Long-term relativistic radiation belt electron responses to GEM magnetic storms

摘要: Abstract We present a long-term radiation belt simulation for 200-day period starting on 25 January 1991, which includes both six geomagnetic storms identified by the Geospace Environment Modeling (GEM) focus group and non-stormy periods of Combined Release Radiation Effects Satellite (CRRES) mission, using 3-D time-dependent Versatile Electron Belt (VERB) code, compare results with multisatellite phase space density (PSD) reanalysis obtained Kalman filtering observations from CRRES, GEO, GPS, Akebono satellites, as well CRRES MEA 1 MeV electron observation. The processes accounted in model are radial diffusion-driven ultra-low frequency (ULF) electromagnetic fluctuations local (pitch-angle energy) scattering plasmaspheric hiss chorus waves, respectively, inside outside plasmasphere. show that significant decrease relativistic electrons outer is observed association solar wind dynamic pressure enhancement during main each storm, while recovery phase, different types flux profiles identified: increased, decreased, unchanged relative to pre-storm level. First, an increase level, comparison shows inward diffusion acceleration coupled other result net acceleration. Second, or lack change electrons, competing effects pitch-angle scattering, outward diffusion, produce PSD fluxes. overall time evolution good agreement our simulations, indicating modeling, including reasonable predicting general structure belt. In addition, assistance level becomes comparable