EGU21-12763
https://doi.org/10.5194/egusphere-egu21-12763
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Statistical EMIC diffusion models calculated by averaging observation specific diffusion coefficients

Johnathan Ross1, Sarah Glauert1, Richard Horne1, Nigel Meredith1, and Clare Watt2
Johnathan Ross et al.
  • 1British Antartic Survey, Space Weather, Cambridge, United Kingdom of Great Britain – England, Scotland, Wales (johros@bas.ac.uk)
  • 2Department of Mathematics, Physics and Electrical Engineering, Northumbria University, Newcastle-upon-Tyne, UK

Electromagnetic ion cyclotron (EMIC) waves play an important role in relativistic electron losses in the radiation belts through diffusion via resonant wave-particle interactions. We present a new statistical model of electron diffusion by EMIC waves calculated, using Van Allen Probe observations, by averaging observation specific diffusion coefficients. The resulting diffusion coefficients therefore capture a wider range of wave-particle interactions than previous average models which are calculated using average observations. These calculations, and their role in radiation belt simulations, are then compared against existing diffusion models. The new diffusion coefficients are found to significantly improve the agreement between the calculated decay of relativistic electrons and Van Allen Probes data.

 

How to cite: Ross, J., Glauert, S., Horne, R., Meredith, N., and Watt, C.: Statistical EMIC diffusion models calculated by averaging observation specific diffusion coefficients, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-12763, https://doi.org/10.5194/egusphere-egu21-12763, 2021.

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