A New Four‐Component L*‐Dependent Model for Radial Diffusion Based on Solar Wind and Magnetospheric Drivers of ULF Waves
The outer radiation belt is a region of space comprising highly energetic
electrons. During periods of extreme space weather, the number and energy of these electrons can rapidly vary.
During these periods as the electron energies and numbers become enhanced, they can pose a threat to satellite
and space infrastructure. While we have an excellent understanding of the physical processes which drive
radiation belt electron dynamics, we still have a limited ability to model and forecast radiation belt dynamics;
this is a result of the complexity of Earth's radiation belt system. One of the key processes controlling radiation
belt dynamics is Ultra Low Frequency (ULF) wave radial diffusion. In this work we detail the development a
new model quantifying the strength of ULF wave radial diffusion in the outer radiation belt utilizing space base
observations of the electric and magnetic fields in Earth's magnetosphere. Accurately quantifying ULF wave
radial diffusion is fundamental to understanding radiation belt dynamics and any improvement or refinements
in radial diffusion models can help to provide a better understanding of the complex radiation belt system and
importantly improve hindcasts, nowcasts, and forecasts.
Authors: Murphy, Kyle R., Sandhu, Jasmine, Rae, I. Jonathan, Daggitt, Thomas ORCID record for Thomas Daggitt, Glauert, Sarah ORCID record for Sarah Glauert, Horne, Richard B. ORCID record for Richard B. Horne, Watt, Clare E. J., Bentley, Sarah, Kellerman, Adam, Ozeke, Louis, Halford, Alexa J., Tian, Sheng, Breneman, Aaron, Olifer, Leonid, Mann, Ian R., Angelopoulos, Vassilis, Wygant, John