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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, p. 1785-1790Conference paper, Published 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, p. 1785-1790
Series
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
Identifiers
URN: urn:nbn:se:kth:diva-36979DOI: 10.1016/j.asr.2004.06.022ISI: 000236277300006Scopus ID: 2-s2.0-24044502955OAI: oai:DiVA.org:kth-36979DiVA, id: diva2:435058
Conference
2nd World Space Congress/34th COSPAR Scientific Assembly Location: HOUSTON, TX Date: OCT 10-19, 2002
Note
QC 20110817Available from: 2011-08-17 Created: 2011-07-21 Last updated: 2011-08-17Bibliographically approved

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