Preprints
https://doi.org/10.5194/angeo-2020-92
https://doi.org/10.5194/angeo-2020-92

  04 Jan 2021

04 Jan 2021

Review status: a revised version of this preprint was accepted for the journal ANGEO and is expected to appear here in due course.

Ionospheric control of space weather

Osuke Saka Osuke Saka
  • Office Geophysik, Ogoori, 838-0141, Japan

Abstract. We propose that ionospheric plasma injections to the magnetosphere (ionospheric injection) represent a new plasma process in the polar ionosphere. The ionospheric injection is first triggered by westward electric fields transmitted from the convection surge in the magnetosphere in association with dipolarization onset. Localized westward electric fields result in local accumulation of ionospheric electrons because of differing electron and ion mobility in the E-layer. This charge imbalance was quickly reduced by polarization electric fields generated in the ionosphere. Meanwhile, ion/electron populations are partially released as injections to the magnetosphere to sustain initial potential distributions in quasi-neutral equilibrium.

Resultant geomagnetic field lines are not in equipotential equilibrium during ionospheric injections but instead develop field-aligned potentials to extract ions/electrons ejected from the ionosphere. Field-aligned potential can exist in the magnetic mirror geometry of auroral field lines if the magnetospheric plasma follows quasi-neutral equilibrium. The parallel potential distribution may be global in scale varying monotonically along the field lines between the ionosphere and the equator. Amplified equatorial projection of ionospheric potentials then develop substorm dipolarization processes in a positive feedback loop. Cold plasmas from the ionosphere are distributed along the dynamical trajectories in the magnetosphere and conserve the total energy (including electrostatic potentials) and first adiabatic invariant. They distribute along a dynamical trajectory either leaving only the energetic part of ionospheric plasmas or not changing velocity space distributions from the ionospheric source.

Osuke Saka

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on angeo-2020-92', Anonymous Referee #1, 01 Feb 2021
    • AC1: 'Reply on RC1', Osuke Saka, 05 Feb 2021
    • AC2: 'Reply on RC2', Osuke Saka, 22 Feb 2021
  • RC2: 'Comment on angeo-2020-92', Anonymous Referee #2, 17 Feb 2021
    • AC2: 'Reply on RC2', Osuke Saka, 22 Feb 2021
    • AC1: 'Reply on RC1', Osuke Saka, 05 Feb 2021

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on angeo-2020-92', Anonymous Referee #1, 01 Feb 2021
    • AC1: 'Reply on RC1', Osuke Saka, 05 Feb 2021
    • AC2: 'Reply on RC2', Osuke Saka, 22 Feb 2021
  • RC2: 'Comment on angeo-2020-92', Anonymous Referee #2, 17 Feb 2021
    • AC2: 'Reply on RC2', Osuke Saka, 22 Feb 2021
    • AC1: 'Reply on RC1', Osuke Saka, 05 Feb 2021

Osuke Saka

Osuke Saka

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Short summary
It has been supposed so far that the earth ionosphere is a passive load in changing weather in space (space weather) during the course of energy transfer from the Sun to the Earth. In this report, we present a new idea that ionosphere is not merely a load in the Sun-Earth system but takes the initiative in space weather.