Journal cover Journal topic
Annales Geophysicae An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 1.490 IF 1.490
  • IF 5-year value: 1.445 IF 5-year
    1.445
  • CiteScore value: 2.9 CiteScore
    2.9
  • SNIP value: 0.789 SNIP 0.789
  • IPP value: 1.48 IPP 1.48
  • SJR value: 0.74 SJR 0.74
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 88 Scimago H
    index 88
  • h5-index value: 21 h5-index 21
Volume 20, issue 4
Ann. Geophys., 20, 471–476, 2002
https://doi.org/10.5194/angeo-20-471-2002
© Author(s) 2002. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 20, 471–476, 2002
https://doi.org/10.5194/angeo-20-471-2002
© Author(s) 2002. This work is distributed under
the Creative Commons Attribution 3.0 License.

  30 Apr 2002

30 Apr 2002

Relationship of upflowing ion beams and conics around the dayside cusp/cleft region to the interplanetary conditions

W. Miyake1, T. Mukai2, and N. Kaya3 W. Miyake et al.
  • 1Communications Research Laboratory, 4-2-1 Koganei, Tokyo 184-8795, Japan
  • 2The Institute of Space and Astronautical Science, Yoshinodai, Sagamihara 229-8510, Japan
  • 3Kobe University, 1-1, Rokkodai, Nada, Kobe 657-8501, Japan
  • Correspondence to: W. Miyake (miyake@crl.go.jp)

Abstract. The dayside cusp/cleft region is known as a major source of upflowing ionospheric ions to the magnetosphere. Since the ions are supposed to be energized by an input of energy from the dayside magnetospheric boundary region, we examined the possible influence of the interplanetary conditions on dayside ion beams and conics observed by the polar-orbiting Exos-D (Akebono) satellite. We found that both the solar wind velocity and density, as well as IMF By and Bz , affect the occurrence frequency of ion conics. The energy of ion conics also depends on the solar wind velocity, IMF By and Bz . The ion beams around the local noon are not significantly controlled by the interplanetary conditions. The results reveal that ion convection, as well as the energy source, is important to understand the production of dayside ion conics while that of ion beams basically reflects the intensity of local field-aligned currents.

Key words. Ionosphere (particle acceleration) – magnetospheric physics (magnetopause, cusp, and boundary layers; magnetosphere ionosphere interaction)

Publications Copernicus
Download
Citation