Comprehensive Observations of Substorm-Enhanced Plasmaspheric Hiss Generation, Propagation, and Dissipation

Nigang Liu, Zhenpeng Su, Zhonglei Gao, Huinan Zheng, Yuming Wang, Shui Wang, Yoshizumi Miyoshi, Iku Shinohara, Yoshiya Kasahara, Fuminori Tsuchiya, Atsushi Kumamoto, Shoya Matsuda, Masafumi Shoji, Takefumi Mitani, Takeshi Takashima, Yoichi Kazama, Bo Jhou Wang, Shiang Yu Wang, Chae Woo Jun, Tzu Fang ChangSunny W.Y. Tam, Satoshi Kasahara, Shoichiro Yokota, Kunihiro Keika, Tomoaki Hori, Ayako Matsuoka

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1 Citation (Scopus)

Abstract

Plasmaspheric hiss is an important whistler-mode emission shaping the Van Allen radiation belt environment. How the plasmaspheric hiss waves are generated, propagate, and dissipate remains under intense debate. With the five spacecraft of Van Allen Probes, Exploration of energization and Radiation in Geospace (Arase), and Geostationary Operational Environmental Satellites missions at widely spaced locations, we present here the first comprehensive observations of hiss waves growing from the substorm-injected electron instability, spreading within the plasmasphere, and dissipating over a large spatial scale. During substorms, hot electrons were injected energy-dispersively into the plasmasphere near the dawnside and, probably through a combination of linear and nonlinear cyclotron resonances, generated whistler-mode waves with globally drifting frequencies. These waves were able to propagate from the dawnside to the noonside, with the frequency-drifting feature retained. Approximately 5 hr of magnetic local time away from the source region in the dayside sector, the wave power was dissipated to (Formula presented.) of its original level.

Original languageEnglish
Article numbere2019GL086040
JournalGeophysical Research Letters
Volume47
Issue number2
DOIs
Publication statusPublished - 2020 Jan 28

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

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    Liu, N., Su, Z., Gao, Z., Zheng, H., Wang, Y., Wang, S., Miyoshi, Y., Shinohara, I., Kasahara, Y., Tsuchiya, F., Kumamoto, A., Matsuda, S., Shoji, M., Mitani, T., Takashima, T., Kazama, Y., Wang, B. J., Wang, S. Y., Jun, C. W., ... Matsuoka, A. (2020). Comprehensive Observations of Substorm-Enhanced Plasmaspheric Hiss Generation, Propagation, and Dissipation. Geophysical Research Letters, 47(2), [e2019GL086040]. https://doi.org/10.1029/2019GL086040