K
Kjellmar Oksavik
Researcher at University of Bergen
Publications - 151
Citations - 3883
Kjellmar Oksavik is an academic researcher from University of Bergen. The author has contributed to research in topics: Ionosphere & Magnetosphere. The author has an hindex of 36, co-authored 141 publications receiving 3227 citations. Previous affiliations of Kjellmar Oksavik include Virginia Tech & Johns Hopkins University Applied Physics Laboratory.
Papers
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Journal ArticleDOI
Variations in the polar cap area during two substorm cycles
Steve Milan,Mark Lester,Stanley W. H. Cowley,Kjellmar Oksavik,Mitchell J. Brittnacher,R. A. Greenwald,George J. Sofko,Jean-Paul Villain +7 more
TL;DR: In this article, the authors employed observations from several sources to determine the location of the polar cap bound-ary, or open/closed field line boundary, at all local times, allowing the amount of open flux in the magnetosphere to be quantified.
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Van Allen probes, NOAA, GOES, and ground observations of an intense EMIC wave event extending over 12 h in magnetic local time
Mark J. Engebretson,J. L. Posch,John R. Wygant,Craig Kletzing,Marc Lessard,C. L. Huang,Harlan E. Spence,Charles W. Smith,Howard J. Singer,Yoshiharu Omura,Richard B. Horne,Geoffrey D. Reeves,Daniel N. Baker,Matina Gkioulidou,Kjellmar Oksavik,Kjellmar Oksavik,Ian R. Mann,Ian R. Mann,Tero Raita,Kazuo Shiokawa +19 more
TL;DR: In this paper, the effects of a large-amplitude linearly polarized hydrogen band EMIC wave event on Earth's outer radiation belt were studied, which extended over 8 and 12 hours in UT and local time, respectively.
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Space weather challenges of the polar cap ionosphere
TL;DR: In this paper, the SuperDARN convection model is used to track polar cap ionosphere patches backward and forward in time, which can be used to forecast its destination in the future.
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Ionospheric patch formation: Direct measurements of the origin of a polar cap patch
TL;DR: The first direct measurements documenting the origin of an ionospheric patch, emerging into the polar cap from the noon dark cusp region of the dayside auroral oval, were presented in this paper.
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Loss of relativistic electrons: Evidence for pitch angle scattering by electromagnetic ion cyclotron waves excited by unstable ring current protons
TL;DR: In this paper, the authors used low-altitude polar-orbiting spacecraft and analyzed fluxes of tens to hundreds of keV protons and relativistic (>1.5 MeV) electrons during a moderate geomagnetic storm, with a long-lasting recovery phase.