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Steve: The Optical Signature of Intense Subauroral Ion Drifts
Univ Saskatchewan, Dept Phys & Engn Phys, Saskatoon, SK, Canada.
Univ Calgary, Dept Phys & Astron, Calgary, AB, Canada.
Univ Calgary, Dept Phys & Astron, Calgary, AB, Canada;New Jersey Inst Technol, Ctr Solar Terr Res, Newark, NJ 07102 USA.
Univ Saskatchewan, Dept Phys & Engn Phys, Saskatoon, SK, Canada;Univ Western Ontario, Dept Phys & Astron, London, ON, Canada.
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2019 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 46, no 12, p. 6279-6286Article in journal (Refereed) Published
Abstract [en]

Little is currently known about the optical phenomenon known as Steve. The first scientific publication on the subject suggests that Steve is associated with an intense subauroral ion drift (SAID). However, additional inquiry is warranted as this suggested relationship as it is based on a single case study. Here we present eight occurrences of Steve with coincident or near-coincident measurements from the European Space Agency's Swarm satellites and show that Steve is consistently associated with SAID. When satellite observations coincident with Steve are compared to that of typical SAID, we find the SAID associated with Steve to have above average peak ion velocities and electron temperatures, as well as extremely low plasma densities.

Place, publisher, year, edition, pages
AMER GEOPHYSICAL UNION , 2019. Vol. 46, no 12, p. 6279-6286
Keywords [en]
ionosphere, Swarm satellites, SAID, Steve
National Category
Geophysics
Identifiers
URN: urn:nbn:se:uu:diva-392879DOI: 10.1029/2019GL082687ISI: 000477616300014OAI: oai:DiVA.org:uu-392879DiVA, id: diva2:1354204
Available from: 2019-09-24 Created: 2019-09-24 Last updated: 2019-09-24Bibliographically approved

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Swedish Institute of Space Physics, Uppsala Division
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