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Simulations of MHD Wave Propagation and Coupling in a 3D Magnetosphere

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journal contribution
posted on 2020-03-03, 12:02 authored by Andrew Wright, Thomas Elsden
A novel simulation grid is devised that is optimized for studying magnetohydrodynamic (MHD) wave coupling and phase mixing in a dipole‐like magnetic field. The model also includes flaring on the dawn and dusk flanks. The location of the magnetopause is quite general. In particular, it does not have to coincide with a coordinate surface. Simulations indicate the central role of global fast waveguide modes. These switch from being azimuthally standing in nature at noon, to propagating antisunward on the flanks. The field line resonances (FLRs) seen in the simulation results are three dimensional and not strictly azimuthally polarized. When a plume is present, the FLRs cross a range of 2 in shell, and have a polarization that is midway between toroidal and poloidal.

Funding

Leverhulme Trust. Grant Number: RPG-2016-071

RCUK | Science and Technology Facilities Council (STFC). Grant Number: STFC (ST/N000609/1)

History

Citation

Journal of Geophysical Research: Space Physics, 125, e2019JA027589. https://doi.org/ 10.1029/2019JA027589

Author affiliation

School of Physics and Astronomy

Version

  • VoR (Version of Record)

Published in

Journal of Geophysical Research: Space Physics

Volume

125

Publisher

American Geophysical Union

issn

2169-9402

Acceptance date

2020-02-01

Copyright date

2020

Publisher version

https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019JA027589?af=R

Language

en

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