Speaker
Dr
Louis Ozeke
(University of Alberta)
Description
Accurate specification of the global distribution of ultra-low frequency (ULF) wave power in space is critical for determining the dynamics and acceleration of outer radiation belt electrons. Current radiation belt models use ULF wave radial diffusion coefficients which are analytic functions of Kp based on ULF wave statistics. In this presentation we show that these statistical based analytic models for the radial diffusion coefficients can produce electron flux values in surprising agreement with the observations during geomagnetically quiet intervals. However, during some storm intervals the radial diffusion rates derived directly from ULF wave observations can become orders of magnitude higher than those given by the analytic expressions based on ULF wave statistics. During these storm intervals only the radiation belt models driven by the radial diffusion coefficients derived directly from ULF wave measurements produce electron flux values in agreement with the observations. Utilizing Van Allen Probe data and CARISMA magnetometer data results will be presented of the electron flux obtained using the diffusion coefficients derived directly from the ULF wave measurements which shed new light on some interesting observations made by the Van Allen Probes
Author
Dr
Louis Ozeke
(University of Alberta)
Co-authors
Dr
Ian Mann
(University of Alberta)
Dr
Kyle Murphy
(NASA)
