Preprints
https://doi.org/10.5194/angeo-2021-8
https://doi.org/10.5194/angeo-2021-8

  05 Feb 2021

05 Feb 2021

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

Attenuation of Plasmaspheric Hiss Associated with the Enhanced Magnetospheric Electric Field

Haimeng Li1,2, Wen Li2, Qianli Ma3,2, Yukitoshi Nishimura2, Zhigang Yuan4, Alex J. Boyd5,6, Xiaochen Shen2, Rongxin Tang1, and Xiaohua Deng1 Haimeng Li et al.
  • 1Institute of Space Science and Technology, Nanchang University, Nanchang, China
  • 2Center for Space Physics, Boston University, Boston, MA, USA
  • 3Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, USA
  • 4School of Electronic Information, Wuhan University, Wuhan, China
  • 5New Mexico Consortium, Los Alamos, NM, USA
  • 6Space Sciences Department, The Aerospace Corporation, Chantilly, VA, USA

Abstract. We report an attenuation of hiss wave intensity in the duskside of outer plasmasphere in response to enhanced convection and substorm based on Van Allen Probes observations. Using test particle codes, we simulate the dynamics of energetic electron fluxes based on a realistic magnetospheric electric field model driven by solar wind and subauroral polarization stream. We suggest that the enhanced magnetospheric electric field causes the outward and sunward motion of energetic electrons, corresponding to the decrease of energetic electron fluxes on the duskside, leading to the subsequent attenuation of hiss wave intensity. The results indicate that the enhanced electric field can significantly change the energetic electron distributions, which provide free energy for hiss wave amplification. This new finding is critical for understanding the generation of plasmaspheric hiss and its response to solar wind and substorm activity.

Haimeng Li et al.

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on angeo-2021-8', Anonymous Referee #1, 15 Mar 2021
    • AC1: 'Reply on RC1', Haimeng Li, 27 Mar 2021
    • AC3: 'Reply on RC1', Haimeng Li, 27 Mar 2021
  • RC2: 'Comment on angeo-2021-8', Anonymous Referee #2, 23 Mar 2021
    • AC2: 'Reply on RC2', Haimeng Li, 27 Mar 2021

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on angeo-2021-8', Anonymous Referee #1, 15 Mar 2021
    • AC1: 'Reply on RC1', Haimeng Li, 27 Mar 2021
    • AC3: 'Reply on RC1', Haimeng Li, 27 Mar 2021
  • RC2: 'Comment on angeo-2021-8', Anonymous Referee #2, 23 Mar 2021
    • AC2: 'Reply on RC2', Haimeng Li, 27 Mar 2021

Haimeng Li et al.

Haimeng Li et al.

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Short summary
We report an event where hiss wave intensity decreased associated with the enhanced convection and substorm. We suggest that the enhanced magnetospheric electric field causes the outward and sunward motion of energetic electrons. This leads to the decrease of energetic electron fluxes on the duskside, which provide free energy for hiss amplification. The study reveals the important role of magnetospheric electric field in the variation of energetic electron flux and the hiss wave intensity.