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dc.contributor.authorRussell, Alexander John Barkway
dc.contributor.authorKarlsson, Tomas
dc.contributor.authorWright, Andrew Nicholas
dc.identifier.citationRussell , A J B , Karlsson , T & Wright , A N 2015 , ' Magnetospheric signatures of ionospheric density cavities observed by Cluster ' , Journal of Geophysical Research: Space Physics , vol. 120 , no. 3 , pp. 1876-1887 .
dc.identifier.otherPURE: 169133751
dc.identifier.otherPURE UUID: 5532ff70-bd85-43ed-9342-b7a18d881bf1
dc.identifier.otherScopus: 85027935972
dc.identifier.otherORCID: /0000-0002-9877-1457/work/58055394
dc.identifier.otherWOS: 000353237600028
dc.descriptionAJBR ackowledges support from STFC under consolidated grant ST/K000993/1.en
dc.description.abstractWe present Cluster measurements of large amplitude electric fields corre- lated with intense downward field-aligned currents, observed during a nightside crossing of the auroral zone. The data are reproduced by a simple model of magnetosphere-ionosphere coupling which, under different conditions, can also produce a divergent electric field signature in the downward current region, or correlation between the electric and perturbed magnetic fields. We conclude that strong electric field associated with intense downward field-aligned current, such as this observation, is a signature of ionospheric plasma depletion caused by the downward current. It is also shown that the electric field in the downward current region correlates with downward current density if a background field is present, e.g. due to magnetospheric convection.
dc.relation.ispartofJournal of Geophysical Research: Space Physicsen
dc.rights©2015. American Geophysical Union. All Rights Reserved.en
dc.subjectQA Mathematicsen
dc.titleMagnetospheric signatures of ionospheric density cavities observed by Clusteren
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.Applied Mathematicsen
dc.description.statusPeer revieweden

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