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Quasiperiodic oscillations observed at the edge of an auroral arc by Auroral Turbulence 2
KTH, Superseded Departments, Alfvén Laboratory.ORCID iD: 0000-0003-2422-5426
KTH, Superseded Departments, Alfvén Laboratory.ORCID iD: 0000-0002-1594-1861
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1999 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 26, no 22, 3365-3368 p.Article in journal (Refereed) Published
Abstract [en]

The Auroral Turbulence II (AT2) sounding rocket carried three payloads into the auroral ionosphere where they crossed several are structures. At the border of an auroral are a quasiperiodic structure was observed by the magnetic and electric field instruments as well as by the particle detectors. The variations were temporal oscillations, but existed only in a narrow (approximate to 7 km) region transverse to the are, with a correlation length along the are of at least several km. The relation between the electric and magnetic field amplitude indicates the Alfvenic nature of the variations. Field aligned electron precipitation is correlated to the field variations. The narrow band nature of the oscillations and frequency around 0.6 Hz is consistent with waves confined in the ionospheric Alfven resonator.

Place, publisher, year, edition, pages
1999. Vol. 26, no 22, 3365-3368 p.
Keyword [en]
Alfven Waves, Sounding Rocket, Boundary, Cavity, Model
National Category
Geophysics
Identifiers
URN: urn:nbn:se:kth:diva-13427DOI: 10.1029/1999GL003588ISI: 000083677500009OAI: oai:DiVA.org:kth-13427DiVA: diva2:325324
Note
QC 20100618Available from: 2010-06-18 Created: 2010-06-18 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Alfven Waves and Spatio-Temporal Structuring in the Auroral Ionosphere
Open this publication in new window or tab >>Alfven Waves and Spatio-Temporal Structuring in the Auroral Ionosphere
2002 (English)Doctoral thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Stockholm: KTH, 2002. x, 41 p.
Keyword
dispersive alfrén waves, auroral particle acceleration, ionospheric alfvén resonator, auroral particle acceleration, small scale auroral structure
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-3364 (URN)
Public defence
2002-06-07, 00:00
Note
QC 20100618Available from: 2002-06-05 Created: 2002-06-05 Last updated: 2010-06-18Bibliographically approved

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Ivchenko, NickolayMarklund, Göran

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