Japan Geoscience Union Meeting 2016

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International Session (Oral)

Symbol P (Space and Planetary Sciences) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM08] Inner magnetosphere: Latest results and new perspectives

Mon. May 23, 2016 10:45 AM - 12:10 PM 103 (1F)

Convener:*Danny Summers(Memorial University of Newfoundland), Yusuke Ebihara(Research Institute for Sustainable Humanosphere, Kyoto University), Yoshizumi Miyoshi(Institute for Space-Earth Environmental Research, Nagoya University), Chair:Danny Summers(Dept of Math and Stats,Memorial University of NewfoundlandInstitute for Space-Earth Environmental Research, Nagoya University)

10:45 AM - 11:00 AM

[PEM08-01] Relativistic electron precipiations associated with the pulsating aurora

*Yoshizumi Miyoshi1, Shinji Saito1, Shin-ichiro Oyama1, Satoshi Kurita1, Kazuo Shiokawa1, Esa Turunen2, Antti Kero2, Jyrki Manninen2 (1.Institute for Space-Earth Environmental Research, Nagoya University, 2.Sodankylä Geophysical Observatory, Finland)

Keywords:Pulsating aurora, radiation belts

We investigate the wide energy electron precipiations from keV to MeV associated with the pulsating aurora. The EISCAT observations indicated that a few hundred keV electrons often precipitate into the middle atmosphere during the pulsating aurora. The satellite at the magnetosphere observes that intense rising tone emissions of chorus waves were observed in the magnetosphere. The chorus waves that propagate to the higher latitudes can modulate electrons for the wide energy range, and resultant precipiations take place. Our computer simulation confirmed this process; chorus waves propagating along the field line cause the wide energy electron precipitations. These precipiations have a great impact on the ion chemistory at the mesosphere. In fact, the computer simulation showed that significant enhancement of NOx and decrease of O3 occurs associated with the precipiation of pulsating aurora electrons.