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Magnetospheric signatures of ionospheric density cavities observed by Cluster
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dc.contributor.author | Russell, Alexander John Barkway | |
dc.contributor.author | Karlsson, Tomas | |
dc.contributor.author | Wright, Andrew Nicholas | |
dc.date.accessioned | 2015-09-18T23:11:09Z | |
dc.date.available | 2015-09-18T23:11:09Z | |
dc.date.issued | 2015-03 | |
dc.identifier | 169133751 | |
dc.identifier | 5532ff70-bd85-43ed-9342-b7a18d881bf1 | |
dc.identifier | 85027935972 | |
dc.identifier | 000353237600028 | |
dc.identifier.citation | Russell , 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 . https://doi.org/10.1002/2014JA020937 | en |
dc.identifier.issn | 2169-9402 | |
dc.identifier.other | ORCID: /0000-0002-9877-1457/work/58055394 | |
dc.identifier.other | ORCID: /0000-0001-5690-2351/work/139965414 | |
dc.identifier.uri | https://hdl.handle.net/10023/7509 | |
dc.description | AJBR ackowledges support from STFC under consolidated grant ST/K000993/1. | en |
dc.description.abstract | We 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.format.extent | 682449 | |
dc.language.iso | eng | |
dc.relation.ispartof | Journal of Geophysical Research: Space Physics | en |
dc.subject | QA Mathematics | en |
dc.subject | NDAS | en |
dc.subject.lcc | QA | en |
dc.title | Magnetospheric signatures of ionospheric density cavities observed by Cluster | en |
dc.type | Journal article | en |
dc.contributor.institution | University of St Andrews. Applied Mathematics | en |
dc.identifier.doi | https://doi.org/10.1002/2014JA020937 | |
dc.description.status | Peer reviewed | en |
dc.date.embargoedUntil | 2015-09-19 |
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