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Electrodynamics of transpolar aurorae
KTH, School of Electrical Engineering (EES), Space and Plasma Physics.
KTH, School of Electrical Engineering (EES), Space and Plasma Physics.
2005 (English)In: SOLAR WIND-MAGNETOSPHERE-IONOSPHERE DYNAMICS AND RADIATION MODELS, 2005, Vol. 36, no 10, 1785-1790 p.Conference paper (Refereed)
Abstract [en]

Polar UV image and Astrid-2 electric and magnetic field data are used to study the evolution of the electrodynamical configuration of the high-latitude ionosphere during a 5-h transpolar arc event. During the course of the event we observe Sunward convection in narrow regions associated with pairs Of upward and downward transpolar are-related field-aligned currents. We also observe Sunward convection deriving from more remotely located field-aligned currents as well as stagnant convection in the centre of the polar region associated with a decoupling of the dawn and dusk side current systems. Schematic pictures of the current closure and convective flows are presented for a variety Of configurations. The different states evolve naturally into each other and do not represent fundamentally different magnetospheric configurations.

Place, publisher, year, edition, pages
2005. Vol. 36, no 10, 1785-1790 p.
, Advances in space research, ISSN 0273-1177
Keyword [en]
transpolar aurorae, field-aligned currents, high-latitude ionosphere, magnetosphere
National Category
Fusion, Plasma and Space Physics
URN: urn:nbn:se:kth:diva-36979DOI: 10.1016/j.asr.2004.06.022ISI: 000236277300006ScopusID: 2-s2.0-24044502955OAI: diva2:435058
2nd World Space Congress/34th COSPAR Scientific Assembly Location: HOUSTON, TX Date: OCT 10-19, 2002
QC 20110817Available from: 2011-08-17 Created: 2011-07-21 Last updated: 2011-08-17Bibliographically approved

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Blomberg, Lars G.Cumnock, Judy
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