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Transpolar arc evolution and associated potential patterns
KTH, Superseded Departments, Alfvén Laboratory. KTH, School of Electrical Engineering (EES), Space and Plasma Physics.
KTH, Superseded Departments, Alfvén Laboratory. KTH, School of Electrical Engineering (EES), Space and Plasma Physics.
2004 (English)In: Annales Geophysicae, ISSN 0992-7689, E-ISSN 1432-0576, Vol. 22, no 4, 1213-1231 p.Article in journal (Refereed) Published
Abstract [en]

We present two event studies encompassing detailed relationships between plasma convection, field-aligned current, auroral emission, and particle precipitation boundaries. We illustrate the influence of the Interplanetary Magnetic Field B, component on theta aurora development by showing two events during which the theta originates on both the dawn and dusk sides of the aurora] oval. Both theta then move across the entire polar region and become part of the opposite side of the aurora] oval. Electric and magnetic field and precipitating particle data are provided by DMSP, while the Polar UVI instrument provides measurements of auroral emissions. Utilizing satellite data as inputs, the Royal Institute of Technology model provides the high-latitude ionospheric electrostatic potential pattern calculated at different times during the evolution of the theta aurora, resulting from a variety of field-aligned current configurations associated with the changing global aurora.

Place, publisher, year, edition, pages
2004. Vol. 22, no 4, 1213-1231 p.
Keyword [en]
ionosphere, auroral ionosphere, electric fields and currents, magnetospheric physics, magnetosphere-ionosphere interactions, interplanetary magnetic-field, polar-cap arcs, convection patterns, theta-aurora, birkeland current, viking satellite, bz northward, plasma, imf, electrodynamics
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:kth:diva-23377ISI: 000221199400013Scopus ID: 2-s2.0-2442448474OAI: oai:DiVA.org:kth-23377DiVA: diva2:342075
Note

QC 20100525 QC 20111101 QC 20150727

Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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