Fluid-Kinetic Variations in the Storm-Time Inner Magnetosphere.

ABSTRACT: Storm-time broadband electromagnetic field variations along the interface between the dipolar field of the Earth's inner-magnetosphere and the stretched fields of the plasma-sheet are decomposed as a superposition of fluid-kinetic modes. Using model eigen-vectors operating on the full set of Van Allen Probes fields measurements it is shown how these variations are composed of a broad spectrum of dispersive Alfvén waves with significant spectral energy densities in the fast and slow modes over scales extending into the kinetic range. These modes occupy volumes in k -space that define the field variations observed at each spacecraft frame frequency ( fsc ). They are in aggregate not necessarily planar and often comprise filamentary structures with no distinct propagation direction in the per

SUBMITTER: Chaston CC 

PROVIDER: S-EPMC9287053 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature