the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
05 Feb 2021
05 Feb 2021
Attenuation of Plasmaspheric Hiss Associated with the Enhanced Magnetospheric Electric Field
- 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
- 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: open (until 19 Mar 2021)
Haimeng Li et al.
Haimeng Li et al.
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