Simulations of MHD wave propagation and coupling in a 3D magnetosphere

Andrew N. Wright; Thomas William Elsden

doi:10.1029/2019JA027589

Simulations of MHD wave propagation and coupling in a 3D magnetosphere

Andrew N. Wright, Thomas William Elsden

Applied Mathematics

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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.

Original language	English
Article number	e2019JA027589
Number of pages	20
Journal	Journal of Geophysical Research: Space Physics
Volume	125
Issue number	2
DOIs	https://doi.org/10.1029/2019JA027589
Publication status	Published - 17 Feb 2020

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Synthesis of Real and Virtual Space: Syhthesis of real and virtual Space Weather data
Wright, A. N. (PI)
The Leverhulme Trust
1/05/16 → 30/04/19
Project: Standard
Solar and Magnetospheric - Consolidated: Solar and Magnetospheric Magnetohydrodynamics and Plasmas: Theory and Application
Hood, A. W. (PI), Archontis, V. (CoI), De Moortel, I. (CoI), Mackay, D. H. (CoI), Neukirch, T. (CoI), Parnell, C. E. (CoI) & Wright, A. N. (CoI)
Science & Technology Facilities Council
1/04/16 → 31/03/19
Project: Standard

Andrew Nicholas Wright
- anwst-andrews.acuk
- Applied Mathematics - Reader
Person: Academic

Cite this

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title = "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.",

author = "Wright, {Andrew N.} and Elsden, {Thomas William}",

note = "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).",

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AU - Elsden, Thomas William

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PY - 2020/2/17

Y1 - 2020/2/17

N2 - 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.

AB - 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.

U2 - 10.1029/2019JA027589

DO - 10.1029/2019JA027589

M3 - Article

SN - 2169-9402

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JO - Journal of Geophysical Research: Space Physics

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IS - 2

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ER -

Simulations of MHD wave propagation and coupling in a 3D magnetosphere

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Projects

Synthesis of Real and Virtual Space: Syhthesis of real and virtual Space Weather data

Solar and Magnetospheric - Consolidated: Solar and Magnetospheric Magnetohydrodynamics and Plasmas: Theory and Application

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Andrew Nicholas Wright

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