13-19 June 2015
University of Alberta
America/Edmonton timezone
Welcome to the 2015 CAP Congress! / Bienvenue au congrès de l'ACP 2015!

Explaining the Newly Discovered Third Radiation Belt

15 Jun 2015, 14:45
15m
CAB 243 (University of Alberta)

CAB 243

University of Alberta

Oral (Non-Student) / orale (non-étudiant) Atmospheric and Space Physics / Physique atmosphérique et de l'espace (DASP-DPAE) M1-3 Theory, modelling and space weather I (DASP) / Théorie, modélisation et climat spatial I (DPAE)

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

Primary author

Dr Louis Ozeke (University of Alberta)

Co-authors

Dr Ian Mann (University of Alberta) Dr Kyle Murphy (NASA)

Presentation Materials

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