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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 26, issue 7
Ann. Geophys., 26, 1725–1730, 2008
https://doi.org/10.5194/angeo-26-1725-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 26, 1725–1730, 2008
https://doi.org/10.5194/angeo-26-1725-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.

  18 Jun 2008

18 Jun 2008

VHF scintillations, orientation of the anisotropy of F-region irregularities and direction of plasma convection in the polar cap

E. D. Tereshchenko1, N. Yu. Romanova1, and A. V. Koustov2 E. D. Tereshchenko et al.
  • 1Polar Geophysical Institute, Russian Academy of Sciences, 15 Khalturina, 183010 Murmansk, Russia
  • 2Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, Canada

Abstract. Scintillation data recorded at the polar cap station Barentsburg are shown to occasionally exhibit two or more peaks in the latitudinal profiles of the amplitude dispersion. Comparison with concurrent SuperDARN radar convection maps indicates that multiple peaks occur when Barentsburg is located within the area of strong changes in the plasma flow direction. When parameters of the ionospheric irregularities are inferred from the scintillation data, the orientation of the irregularity anisotropy in a plane perpendicular to the magnetic field is found to coincide well with the E×B flow direction, individually for each peak of the scintillation data. The differences were found to be mostly less than 20° for a data set comprised of 104 events. The conclusion is made that analysis of scintillation data allows one to infer the direction of plasma flow with a certain degree of detail.

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