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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 25, issue 12
Ann. Geophys., 25, 2615-2625, 2007
https://doi.org/10.5194/angeo-25-2615-2007
© Author(s) 2007. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 25, 2615-2625, 2007
https://doi.org/10.5194/angeo-25-2615-2007
© Author(s) 2007. This work is distributed under
the Creative Commons Attribution 3.0 License.

  02 Jan 2007

02 Jan 2007

Magnetopause mapping to the ionosphere for northward IMF

I. I. Alexeev1, E. S. Belenkaya1, S. Yu. Bobrovnikov1, V. V. Kalegaev1, J. A. Cumnock3,2, and L. G. Blomberg2 I. I. Alexeev et al.
  • 1Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, Russia
  • 2Space and Plasma Physics, School of Electrical Engineering, Royal Institute of Technology, Stockholm, Sweden
  • 3Center for Space Sciences, University of Texas at Dallas, Richardson, TX, USA

Abstract. We study the topological structure of the magnetosphere for northward IMF. Using a magnetospheric magnetic field model we study the high-latitude response to prolonged periods of northward IMF. For forced solar wind conditions we investigate the location of the polar cap region, the polar cap potential drop, and the field-aligned acceleration potentials, depending on the solar wind pressure and IMF By and Bx changes. The open field line bundles, which connect the Earth's polar ionosphere with interplanetary space, are calculated. The locations of the magnetospheric plasma domains relative to the polar ionosphere are studied. The specific features of the open field line regions arising when IMF is northward are demonstrated. The coefficients of attenuation of the solar wind magnetic and electric fields which penetrate into the magnetosphere are determined.

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