New Chorus Diffusion Coefficients for Radiation Belt Modeling

Wong, Jin‐Mann ORCID: https://orcid.org/0000-0002-4729-075X; Meredith, Nigel P. ORCID: https://orcid.org/0000-0001-5032-3463; Horne, Richard B. ORCID: https://orcid.org/0000-0002-0412-6407; Glauert, Sarah A. ORCID: https://orcid.org/0000-0003-0149-8608; Ross, Johnathan P.J. ORCID: https://orcid.org/0000-0001-5282-3293. 2024 New Chorus Diffusion Coefficients for Radiation Belt Modeling. Journal of Geophysical Research: Space Physics, 129 (1). 30, pp. https://doi.org/10.1029/2023JA031607

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Abstract/Summary

Relativistic electrons in the Earth's outer radiation belt are a significant space weather hazard. The belt, which lies at altitudes from 13,000 to 40,000 km in the Earth's magnetic equatorial plane, is highly dynamic with fluxes of relativistic electrons varying by orders of magnitude on timescales ranging from minutes to months. This variability is controlled by a variety of transport, acceleration and loss processes. One particularly important process is the interaction with a plasma wave, known as chorus. These waves play a significant role in both the acceleration and loss of energetic electrons. In this study we derive new diffusion rates for these interactions and find that the rates can exceed those in our earlier models by up to a factor of 10. The new diffusion rates will be incorporated into the British Antarctic Survey Radiation Belt Model to produce better space weather models and forecasts.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1029/2023JA031607
ISSN:	2169-9380
Additional Keywords:	radiation belts, electron diffusion, chorus waves
Date made live:	29 Dec 2023 09:10 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/536548

Item Type:

Publication - Article

Digital Object Identifier (DOI):

https://doi.org/10.1029/2023JA031607

ISSN:

2169-9380

Additional Keywords:

radiation belts, electron diffusion, chorus waves

Date made live:

29 Dec 2023 09:10 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/536548