Joint two-dimensional observations of ground magnetic and ionospheric electric fields associated with auroral currents. 5. Current system associated with eastward drifting omega bands
Item
Title (Dublin Core)
en-US
Joint two-dimensional observations of ground magnetic and ionospheric electric fields associated with auroral currents. 5. Current system associated with eastward drifting omega bands
Description (Dublin Core)
en-US
Magnetograms from the Scandinavian Magnetometer Array (SMA) and ionospheric electric field measurements from the Scandinavian Twin Auroral Radar Experiment (STARE) have been evaluated during the passage of several omega bands (or eastward travelling surges) over Northern Scandinavia around 0400 MLT on 16 February 1977. The eastward motion of the omega bands was a pure E × B drift and was associated with Ps6 disturbances of the east-west component particularly of magnetic and electric fields. The two-dimensional distributions of electric and magnetic disturbance fields strongly support the hypothesis of a three-dimensional current system which is embedded in a rather homogeneous westward Hall current and where north-south aligned localized regions of field-aligned currents, flowing upward close to the omega band's wave-crest and downward east and west of it, are travelling eastward with the omega band. These field-aligned currents are associated with eastward and westward electric field disturbances and southward and northward Hall currents between them. It remains unclear whether these Hall currents close within the ionosphere, i.e. forming counterclockwise and clockwise ellipsoidal Hall current vortices, or if they diverge from the ionosphere as field-aligned currents at the southern and northern boundary of the region that is disturbed by the omega band.
ARK: https://n2t.net/ark:/88439/y015335
Permalink: https://geophysicsjournal.com/article/201
ARK: https://n2t.net/ark:/88439/y015335
Permalink: https://geophysicsjournal.com/article/201
Creator (Dublin Core)
Andre, D.
Baumjohann, W.
Subject (Dublin Core)
en-US
Scandinavian Magnetometer Array
en-US
STARE
en-US
Magnetic fields
en-US
Electric fields
en-US
Auroral zone
en-US
Omega bands
en-US
Eastward travelling surges
en-US
Ps6
en-US
Data
Publisher (Dublin Core)
en-US
Journal of Geophysics
Date (Dublin Core)
1981-10-22
Type (Dublin Core)
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
en-US
Peer-reviewed Article
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
https://journal.geophysicsjournal.com/JofG/article/view/201
Source (Dublin Core)
en-US
Journal of Geophysics; Vol 50 No 1 (1982): Journal of Geophysics; 194-201
2643-2986
2643-9271
Language (Dublin Core)
eng
Relation (Dublin Core)
https://journal.geophysicsjournal.com/JofG/article/view/201/161