EGU22-11822
https://doi.org/10.5194/egusphere-egu22-11822
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Energetic electron precipitations by chorus waves and its impact on the middleatmosphere

Yoshizumi Miyoshi1, Shinji Saito2, Keisuke Hosokawa3, Kazushi Asamura4, Shinichiro Oyama1, Takefumi Mitani4, Takeshi Sakanoi5, Antti Kero6, Esa Turunen6, and Pekka Verronen7
Yoshizumi Miyoshi et al.
  • 1Nagoya University, Institute for Space-Earth Environmental Research, Nagoya, Japan (miyoshi@isee.nagoya-u.ac.jp)
  • 2National Institute of Information and Communications Technology, Japan
  • 3The University of Electro-Communications, Japan
  • 4JAXA, Japan
  • 5Tohoku University, Japan
  • 6Sodankylä Geophysical Observatory, Finland
  • 7Finnish Meteorological Institute, Finland

Whistler chorus waves cause energetic electron precipitations into the Earth’s atmosphere, and signatures of precipitations are observed as diffuse,
pulsating aurora, and microbursts of energetic electrons. In this talk, we present our model that propagating chorus waves cause wide energy electron precipitations and relativistic electron microbursts are a high-energy tail of the pulsating aurora electrons. The chorus waves can resonate with tens keV electrons near the magnetic equator, which causes the pulsating aurora emissions, while the chorus waves can resonate with sub-relativistic/relativistic electrons at the off-equator, which cause the microbursts of energetic electrons. Moreover, we discuss that relativistic electrons cause a significant ozone destruction at the middle atmosphere by conjugate observations of Arase, ground-based observations, SIC ion chemistry simulation.

How to cite: Miyoshi, Y., Saito, S., Hosokawa, K., Asamura, K., Oyama, S., Mitani, T., Sakanoi, T., Kero, A., Turunen, E., and Verronen, P.: Energetic electron precipitations by chorus waves and its impact on the middleatmosphere, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-11822, https://doi.org/10.5194/egusphere-egu22-11822, 2022.