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Ponderomotive saturation of magnetospheric field line resonances

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dc.contributor.authorTikhonchuk, Vladimir T.
dc.contributor.authorFrycz, P.
dc.contributor.authorRankin, Robert
dc.contributor.authorSamson, John C.
dc.date.accessioned2025-05-01T12:26:59Z
dc.date.available2025-05-01T12:26:59Z
dc.date.issued1995
dc.descriptionCompressional Alfvén waves in the terrestrial magnetospheric cavity constitute a discrete spectrum of global modes which can resonate with specific components of the continuum spectrum of shear Alfvén wave (SAW) field line resonant frequencies. We investigate the effect of the ponderomotive force (PF) of excited standing SAWs on the nonlinear saturation of field line resonances (FLRs). In low β plasmas FLR saturation occurs due to a nonlinear phase slip between the fast mode driver and SAW field. Ponderomotive forces also lead to density depletions at the ionospheres, nonlinear narrowing of the FLR and meridional scales comparable to those embedded within temporally modulated discrete auroral arcs. Observational features relating to these effects are discussed.
dc.identifier.doihttps://doi.org/10.7939/R3Z02ZQ09
dc.language.isoen
dc.relationhttp://doi.org/10.1029/95GL01311
dc.relation.isversionofRankin, Robert, Frycz, P., Tikhonchuk, Vladimir T., & Samson, John C. (1995). Ponderomotive saturation of magnetospheric field line resonances. Geophysical Research Letters, 22(13), 1741-1744. http://doi.org/10.1029/95GL01311
dc.rights© 1995 American Geophysical Union. This version of this article is open access and can be downloaded and shared. The original author(s) and source must be cited.
dc.subjectField Line Resonances
dc.subjectPonderomotive Force
dc.subjectAlfven Waves
dc.titlePonderomotive saturation of magnetospheric field line resonances
dc.typehttp://purl.org/coar/resource_type/c_6501 http://purl.org/coar/version/c_970fb48d4fbd8a85
ual.jupiterAccesshttp://terms.library.ualberta.ca/public

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