Simulations of MHD wave propagation and coupling in a 3D magnetosphere
Abstract
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.
Citation
Wright , A N & Elsden , T W 2020 , ' Simulations of MHD wave propagation and coupling in a 3D magnetosphere ' , Journal of Geophysical Research: Space Physics , vol. 125 , no. 2 , e2019JA027589 . https://doi.org/10.1029/2019JA027589
Publication
Journal of Geophysical Research: Space Physics
Status
Peer reviewed
ISSN
2169-9402Type
Journal article
Rights
Copyright ©2020. American Geophysical Union. All Rights Reserved. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the final published version of the work, which was originally published at https://doi.org/10.1029/2019JA027589
Description
ANW was partially funded by STFC (ST/N000609/1) and the Leverhulme Trust (RPG- 2016-071). TE was funded by the Leverhulme Trust (RPG-2016-071) and a Leverhulme Trust Early Career Fellowship (ECF-2019-155).Collections
Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.