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dc.contributor.authorClaudepierre, S.G.
Toffoletto, F.R.
Wiltberger, M.
dc.date.accessioned 2017-05-22T18:57:18Z
dc.date.available 2017-05-22T18:57:18Z
dc.date.issued 2016
dc.identifier.citation Claudepierre, S.G., Toffoletto, F.R. and Wiltberger, M.. "Global MHD modeling of resonant ULF waves: Simulations with and without a plasmasphere." Journal of Geophysical Research: Space Physics, 121, no. 1 (2016) Wiley: 227-244. http://dx.doi.org/10.1002/2015JA022048.
dc.identifier.urihttps://hdl.handle.net/1911/94339
dc.description.abstract We investigate the plasmaspheric influence on the resonant mode coupling of magnetospheric ultralow frequency (ULF) waves using the Lyon-Fedder-Mobarry (LFM) global magnetohydrodynamic (MHD) model. We present results from two different versions of the model, both driven by the same solar wind conditions: one version that contains a plasmasphere (the LFM coupled to the Rice Convection Model, where the Gallagher plasmasphere model is also included) and another that does not (the stand-alone LFM). We find that the inclusion of a cold, dense plasmasphere has a significant impact on the nature of the simulated ULF waves. For example, the inclusion of a plasmasphere leads to a deeper (more earthward) penetration of the compressional (azimuthal) electric field fluctuations, due to a shift in the location of the wave turning points. Consequently, the locations where the compressional electric field oscillations resonantly couple their energy into local toroidal mode field line resonances also shift earthward. We also find, in both simulations, that higher-frequency compressional (azimuthal) electric field oscillations penetrate deeper than lower frequency oscillations. In addition, the compressional wave mode structure in the simulations is consistent with a radial standing wave oscillation pattern, characteristic of a resonant waveguide. The incorporation of a plasmasphere into the LFM global MHD model represents an advance in the state of the art in regard to ULF wave modeling with such simulations. We offer a brief discussion of the implications for radiation belt modeling techniques that use the electric and magnetic field outputs from global MHD simulations to drive particle dynamics.
dc.language.iso eng
dc.publisher Wiley
dc.rights This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/3.0/us/
dc.title Global MHD modeling of resonant ULF waves: Simulations with and without a plasmasphere
dc.type Journal article
dc.citation.journalTitle Journal of Geophysical Research: Space Physics
dc.subject.keywordfield line resonance
global MHD simulation
plasmasphere
radiation belts
resonant ULF wave coupling
waveguide
dc.citation.volumeNumber 121
dc.citation.issueNumber 1
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1002/2015JA022048
dc.identifier.pmcid PMC5020600
dc.identifier.pmid 27668142
dc.type.publication publisher version
dc.citation.firstpage 227
dc.citation.lastpage 244


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This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
Except where otherwise noted, this item's license is described as This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.