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Spatial gradients in the plasmasphere form Cluster

dc.contributor.authorDarrouzet, F.
dc.contributor.authorDe Keyser, J.
dc.contributor.authorDécréau, P.M.E.
dc.contributor.authorLemaire, J.F.
dc.contributor.authorDunlop, M.W.
dc.date2006
dc.date.accessioned2016-11-22T11:27:18Z
dc.date.available2016-11-22T11:27:18Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/4490
dc.descriptionThe Cluster mission allows the study of the plasmasphere with four-point measurements, including its overall density distribution, plasmaspheric plumes close to the plasmapause, and density irregularities inside the plasmasphere. The purpose of this letter is to examine the geometry and orientation of the overall density structure and of the magnetic field. We present a typical Cluster plasmasphere crossing for which we compute the four-point spatial gradient of the electron density and the magnetic field strength, and we compare the direction of both gradients with the local field vector. We discuss the role of the gradient components along and transverse to field lines; transverse density gradients, in particular, are found to suggest the presence of azimuthal density variations.
dc.languageeng
dc.titleSpatial gradients in the plasmasphere form Cluster
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.freeCarrier concentration
dc.subject.freeGeometry
dc.subject.freeMagnetic fields
dc.subject.freePlasma density
dc.subject.freePlasma sources
dc.subject.freeDensity distribution
dc.subject.freeDensity gradients
dc.subject.freeDensity structure
dc.subject.freePlasmasphere
dc.subject.freeSpatial gradients
dc.subject.freeEarth atmosphere
dc.subject.freeelectron density
dc.subject.freegeomagnetic field
dc.subject.freeplasma
dc.source.titleGeophysical Research Letters
dc.source.volume33
dc.source.issue8
dc.source.pageL08105
Orfeo.peerreviewedYes
dc.identifier.doi10.1029/2006GL025727
dc.identifier.scopus2-s2.0-33745442292


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