Modeling cross L shell impacts of magnetopause shadowing and ULF wave radial diffusion in the Van Allen belts

TitleModeling cross L shell impacts of magnetopause shadowing and ULF wave radial diffusion in the Van Allen belts
Publication TypeJournal Article
Year of Publication2014
AuthorsOzeke, LG, Mann, IR, Turner, DL, Murphy, KR, Degeling, AW, I. Rae, J, Milling, DK
JournalGeophysical Research Letters
Volume41
Issue19
Pagination6556 - 6562
Date Published10/2014
Keywordsmagnetopause shadowing; Radiation belt; ULF wave radial diffusion
AbstractWe present simulations of the outer electron radiation belt using a new ULF wave-driven radial diffusion model, including empirical representations of loss due to chorus and plasmaspheric hiss. With an outer boundary condition constrained by in situ electron flux observations, we focus on the impacts of magnetopause shadowing and outward radial diffusion in the heart of the radiation belt. Third invariant conserving solutions are combined to simulate the L shell and time dependence of the differential flux at a fixed energy. Results for the geomagnetically quiet year of 2008 demonstrate not only remarkable cross L shell impacts from magnetopause shadowing but also excellent agreement with the in situ observations even though no internal acceleration source is included in the model. Our model demonstrates powerful utility for capturing the cross-L impacts of magnetopause shadowing with significant prospects for improved space weather forecasting. The potential role of the plasmasphere in creating a third belt is also discussed.
URLhttp://doi.wiley.com/10.1002/grl.v41.19http://doi.wiley.com/10.1002/2014GL060787
DOI10.1002/2014GL060787
Short TitleGeophys. Res. Lett.


Page Last Modified: September 12, 2016