Open AccessStormtime particle energization with high temporal resolution AMIE potentials
Author(s) -
Khazanov George V.,
Liemohn Michael W.,
Fok MeiChing,
Newman Timothy S.,
Ridley Aaron J.
Publication year - 2004
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2003ja010186
Subject(s) - electric field , physics , magnetosphere , storm , computational physics , van allen radiation belt , electron , ionosphere , cadence , population , magnetic field , geophysics , atmospheric sciences , meteorology , nuclear physics , demography , quantum mechanics , sociology , acoustics
Simulations were conducted to investigate the influence of rapid electric field fluctuations on electron energization in the inner magnetosphere based on the assimilative mapping of ionospheric electrodynamics (AMIE) technique. Simulations for four different magnetic storms were run, namely those that occurred on 15 May 1997, 4 May 1998, 25 September 1998, and 19 October 1998. Here we have examined the formation of high‐energy (100–500 keV) electrons in the inner magnetosphere during these storm events with our recently developed relativistic radiation belt transport code. The point of this numerical experiment is to show that a simulation of a real event must have the high time resolution electric field input files in order to produce the seed population for the radiation belts, which are often observed to increase in the days following a magnetic storm. Specifically, a cadence of the global electric field pattern of 5 min or less produces inner magnetospheric fluxes that are larger (by up to several orders of magnitude) than fluxes produced with a longer cadence. Differences were particularly large relative to simulation results with a 3‐hour time cadence, analogous to a Kp‐driven electric field model.