Energy dissipation in the polar thermosphere at the substorm recovery phase

• Project/Area Number: 16K05569
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Space and upper atmospheric physics
• Research Institution: Nagoya University
• Principal Investigator: Oyama Shin-ichiro 名古屋大学, 宇宙地球環境研究所, 講師 (20444424)
• Project Period (FY): 2016-10-21 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 極域 / 熱圏 / オーロラ / 電離圏 / ファブリペロー干渉計 / 磁気嵐 / 脈動

Outline of Final Research Achievements

Auroral substorm has three phases of growth, expansion and recovery, including a sudden brightening of aurora. At the substorm recovery phase, the aurora tends to have temporal pulsations of the luminosity and spatially irregular shape of the patch. This study focused on the auroral patch, and studied energy dissipations around the patch analyzing observed data. We made experiments with the EISCAT radar, high sensitive camera and Fabry-Perot interferometer (FPI). From these analyses, we concluded that high energetic electrons precipitate embedding in the auroral patch and the lower thermospheric wind fluctuates near the patch.

Academic Significance and Societal Importance of the Research Achievements

本研究により、数百keVを超える高エネルギー電子がオーロラパッチと一緒に発生し、それと同時に熱圏大気が変動することが分かった。オーロラパッチが出現する時間帯は数時間以上あり、かなり長い時間、熱圏は変動することが分かる。熱圏は低高度衛星が飛翔する高度でもあり、安定した衛星運用を実現するためには、熱圏が変動する時間と場所を知ることは重要である。本研究は、それを知るための指針となる成果と言える。

Research Products

• [Int'l Joint Research] オウル大学/ソダンキラ地球物理観測所/フィンランド気象研究所(フィンランド)
• [Int'l Joint Research] アラスカ大学フェアバンクス校(米国)
• [Int'l Joint Research] IRF(スウェーデン)
• [Int'l Joint Research] UNIS/トロムソ大学(ノルウェー)
• [Int'l Joint Research] University of Oulu/Sodankyla Geophysical Observatory/Finnish Meteorological Institute(フィンランド)
• [Int'l Joint Research] IRF(スウェーデン)
• [Int'l Joint Research] UNIS(ノルウェー)
• [Int'l Joint Research] GI UAF(米国)
• [Int'l Joint Research] GI UAF(米国)
• [Int'l Joint Research] University of Oulu(フィンランド)
• [Journal Article] Visualization of rapid electron precipitation via chorus element wave?particle interactions (2019)
  • Author(s): Ozaki M. et al.
  • Journal Title: Nature Comm. Volume: 10 Pages: 1-9
  • DOI: 10.1038/s41467-018-07996-z
  • NAID: 120006550406
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Tracking the Region of High Correlation Between Pulsating Aurora and Chorus: Simultaneous Observations With Arase Satellite and Ground‐Based All‐Sky Imager in Russia (2019)
  • Author(s): Kawamura S.、Hosokawa K.、Kurita S.、Oyama S.、Miyoshi Y.、Kasahara Y.、Ozaki M.、Matsuda S.、Matsuoka A.、Kozelov B.、Kawamura Y.、Shinohara I.
  • Journal Title: J. Geophys. Res. Volume: 124
  • DOI: 10.1029/2019ja026496
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Fabry‐Perot interferometer observations of thermospheric horizontal winds during magnetospheric substorms (2019)
  • Author(s): Cai L.、Oyama S.、Aikio A.、Vanham?ki H.、Virtanen I.
  • Journal Title: J. Geophys. Res. Volume: - Pages: 3709-3728
  • DOI: 10.1029/2018ja026241
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Auroral molecular-emission effects on the atomic oxygen line at 777.4 nm (2018)
  • Author(s): S. Oyama, T. T. Tsuda, K. Hosokawa, Y. Ogawa, Y. Miyoshi, S. Kurita, A. E. Kero, R. Fujii, Y. Tanaka, A. Mizuno, T. Kawabata, B. Gustavsson, and T. Leyser
  • Journal Title: Earth, Planets and Space Volume: 70 Pages: 166-166
  • DOI: 10.1186/s40623-018-0936-z
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Survey of conditions for artificial aurora experiments by the second electron gyro-harmonic at EISCAT Tromsoe; using dynasonde data (2018)
  • Author(s): Tsuda, T.T., M.T. Rietveld, M.J. Kosch, S. Oyama, Y. Ogawa, K. Hosokawa, S. Nozawa, T. Kawabata, and A. Mizuno
  • Journal Title: Earth, Planets and Space Volume: 70 Pages: 193-193
  • DOI: 10.1186/s40623-018-0864-y
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Purple auroral rays and global Pc1 pulsations observed at the CIR-associated solar wind density enhancement on March 21, 2017 (2018)
  • Author(s): Shiokawa, K., M. Ozaki, A. Kadokura, Y. Endo, T. Sakanoi, S. Kurita, Y. Miyoshi, S.-I. Oyama, M. Connors, I. Schofield, J. M. Ruohoniemi, M. Nose, 他19名
  • Journal Title: Geophysical Research Letters Volume: 45 Pages: 1-10
  • DOI: 10.1029/2018gl079103
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Microscopic Observations of Pulsating Aurora Associated With Chorus Element Structures: Coordinated Arase Satellite‐PWING Observations (2018)
  • Author(s): Ozaki M. et al.
  • Journal Title: Geophys. Res. Lett. Volume: 45 Pages: 1-10
  • DOI: 10.1029/2018gl079812
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Rapid Loss of Relativistic Electrons by EMIC Waves in the Outer Radiation Belt Observed by Arase, Van Allen Probes, and the PWING Ground Stations (2018)
  • Author(s): Kurita S.、Miyoshi Y.、Shiokawa K.、Higashio N.、Mitani T.、Takashima T.、Matsuoka A.、Shinohara I.、Kletzing C. A.、Blake J. B.、Claudepierre S. G.、Connors M.、Oyama S.、Nagatsuma T.、Sakaguchi K.、Baishev D.、Otsuka Y.
  • Journal Title: Geophysical Research Letters Volume: 45
  • DOI: 10.1029/2018gl080262
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Electrostatic Electron Cyclotron Harmonic Waves as a Candidate to Cause Pulsating Auroras (2018)
  • Author(s): Fukizawa M.、Sakanoi T.、Miyoshi Y.、Hosokawa K.、Shiokawa K.、Katoh Y.、Kazama Y.、Kumamoto A.、Tsuchiya F.、Miyashita Y.、Tanaka Y. ‐M.、Kasahara Y.、Ozaki M.、Matsuoka A.、Matsuda S.、Hikishima M.、Oyama S.、Ogawa Y.、Kurita S.、Fujii R.
  • Journal Title: Geophys. Res. Lett. Volume: 45
  • DOI: 10.1029/2018gl080145
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Survey of conditions for artificial aurora experiments at EISCAT Troms? using dynasonde data (2018)
  • Author(s): Tsuda T. T.、Rietveld M. T.、Kosch M. J.、Oyama S.、Hosokawa K.、Nozawa S.、Kawabata T.、Mizuno A.、Ogawa Y.
  • Journal Title: Earth Planets Space Volume: 70 Pages: 1-11
  • DOI: 10.1186/s40623-018-0805-9
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Measurement of thermospheric temperatures using OMTI Fabry?Perot interferometers with 70-mm etalon (2017)
  • Author(s): Nakamura Y.、Shiokawa K.、Otsuka Y.、Oyama S.、Nozawa S.、Komolmis T.、Komonjida S.、Neudegg Dave、Yuile Colin、Meriwether J.、Shinagawa H.、Jin H.
  • Journal Title: Earth Planets Space Volume: 69 Pages: 1-13
  • DOI: 10.1186/s40623-017-0643-1
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Energetic electron precipitation and auroral morphology at the substorm recovery phase (2017)
  • Author(s): Oyama S.、Kero A.、Rodger C. J.、Clilverd M. A.、Miyoshi Y.、Partamies N.、Turunen E.、Raita T.、Verronen P. T.、Saito S.
  • Journal Title: J. Geophys. Res. Volume: 122 Pages: 6508-6527
  • DOI: 10.1002/2016ja023484
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Simultaneous FPI and TMA Measurements of the Lower Thermospheric Wind in the Vicinity of the Poleward Expanding Aurora After Substorm Onset (2017)
  • Author(s): Oyama Shin-ichiro、Kubota Ken、Morinaga Takatoshi、Tsuda Takuo T.、Kurihara Junichi、Larsen Miguel F.、Yamamoto Masayuki、Cai Lei
  • Journal Title: J. Geophys. Res. Volume: 122
  • DOI: 10.1002/2017ja024613
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Ground-based instruments of the PWING project to investigate dynamics of the inner magnetosphere at subauroral latitudes as a part of the ERG-ground coordinated observation network (2017)
  • Author(s): Shiokawa Kazuo、Katoh Yasuo、Hamaguchi Yoshiyuki、Yamamoto Yuka、Adachi Takumi、Ozaki Mitsunori、Oyama Shin-Ichiro、et al.
  • Journal Title: Earth Planets Space Volume: 69 Pages: 1-21
  • DOI: 10.1186/s40623-017-0745-9
  • NAID: 120006537087
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Mesospheric ozone destruction by high-energy electron precipitation associated with pulsating auora (2016)
  • Author(s): Turunen, E., A. Kerro, P. T. Verronen, Y. Miyoshi, S. Oyama, and S. Saito
  • Journal Title: Jounal of Geophysical Research Volume: 121 Pages: 11852-11861
  • DOI: 10.1002/2016jd025015
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Thermospheric Nocturnal Wind Climatology Observed by Fabry-Perot Interferometers over the Asia-Oceania Region (2016)
  • Author(s): Akiyo YATAGAI and Shin-ichiro OYAMA
  • Journal Title: JMSJ Volume: 94 Issue: 6 Pages: 525-536
  • DOI: 10.2151/jmsj.2016-026
  • NAID: 130005286355
  • ISSN: 0026-1165, 2186-9057
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] SDI-3D project: MIT coupling study with the EISCAT_3D (2019)
  • Author(s): Oyama, S., A. Aikio, M. G. Conde, H. Vanhamaki, I. Virtanen, T. Ulich, U. Brondstrom, P. Verronen, L. Roininen, Sari Lasanen, A. Workayehu, K. Shiokawa, Heqiucen Xu, M. Ishii, M. Hirahara, T. Sakanoi, Y. Tanaka, C. Fallen, B. J. Watkins, M. Orispaa, Y. Ogawa, L. Cai, E. Turunen, and K. Kauristie
  • Organizer: Observatory Days 2019
  • Int'l Joint Research
• [Presentation] オーロラ高エネルギー粒子による大気微量成分への影響に関する研究 (2018)
  • Author(s): Oyama, S., Esa Turunen, Antti E. Kero, Pekka T. Verronen, Yoshizumi Miyoshi, Akira Mizuno, Craig Rodger, Mark Clilverd, Thomas Ulich, Noora Partamies, Masato Shiotani and Shinji Saito
  • Organizer: 第１回JCAR北極域研究計画ワークショップ
• [Presentation] EISCAT_3Dと熱圏大気プロファイラを用いた極域磁気圏－電離圏－熱圏結合の研究 (2018)
  • Author(s): Oyama, S., Mark G. Conde, Anita Aikio, Esa Turunen, Kirsti Kauristie, Heikki Vanhamaki, Ilkka Virtanen, Urban Brondstrom, Thomas Ulich, Lei Cai, Abiyot Workayehu, Kazuo Shiokawa, Mamoru Ishii, Masafumi Hirahara, Cristopher Fallen, Brenton J. Watkins
  • Organizer: 第１回JCAR北極域研究計画ワークショップ
• [Presentation] SDI-3D project: measurements of the thermosphere (2018)
  • Author(s): Oyama, S., Mark G. Conde, Anita Aikio, Esa Turunen, Kirsti Kauristie, Heikki Vanhamaki, Ilkka Virtanen, Urban Brondstrom, Thomas Ulich, Lei Cai, Abiyot Workayehu, Kazuo Shiokawa, Mamoru Ishii, Masafumi Hirahara, Cristopher Fallen, Brenton J. Watkins
  • Organizer: EISCAT_3D user meeting
  • Int'l Joint Research
• [Presentation] オーロラ高エネルギー粒子による大気微量成分への影響に関する研究 (2018)
  • Author(s): Oyama, S., Esa Turunen, Antti E. Kero, Pekka T. Verronen, Yoshizumi Miyoshi, Akira Mizuno, Craig Rodger, Mark Clilverd, Thomas Ulich, Noora Partamies, Masato Shiotani and Shinji Saito
  • Organizer: 極域における宙空圏観測・研究の将来構想に関する研究集会
• [Presentation] EISCAT_3Dと熱圏大気プロファイラを用いた極域磁気圏－電離圏－熱圏結合の研究 (2018)
  • Author(s): Oyama, S., Mark G. Conde, Anita Aikio, Esa Turunen, Kirsti Kauristie, Heikki Vanhamaki, Ilkka Virtanen, Urban Brondstrom, Thomas Ulich, Lei Cai, Abiyot Workayehu, Kazuo Shiokawa, Mamoru Ishii, Masafumi Hirahara, Cristopher Fallen, Brenton J. Watkins
  • Organizer: 極域における宙空圏観測・研究の将来構想に関する研究集会
• [Presentation] New insights found from coalescence of the ionospheric and thermospheric measurements at auroral latitudes (2018)
  • Author(s): Oyama, S., Anita Aikio, Mark Conde, Heikki Vanhamaki, Ilkka Virtanen, Lei Cai, Ken Kubota, Takatoshi Morinaga, Takuo T. Tsuda, Junichi Kurihara, Miguel F. Larsen, Masayuki Yamamoto, Masafumi Hirahara, and Kazuo Shiokawa
  • Organizer: JpGU
  • Int'l Joint Research / Invited
• [Presentation] Simultaneous FPI and TMA Measurements of the Lower-thermospheric Wind in the Vicinity of the Poleward-expanding Aurora After Substorm Onset (2018)
  • Author(s): Oyama, S., Ken KUBOTA, Takatoshi MORINAGA, Takuo TSUDA, Junichi KURIHARA, Miguel LARSEN, Masa-Yuki YAMAMOTO, Lei CAI
  • Organizer: AOGS
  • Int'l Joint Research
• [Presentation] Coordinated observations with the ground-based instruments and satellites to study energetic electron precipitation and auroral morphology at the substorm recovery phase (2018)
  • Author(s): Oyama, Antti E. Kero, Craig Rodger, Mark A. Clilverd, Yoshizumi Miyoshi, Noora Partamies, Esa Turunen, Tero Raita, Pekka T. Verronen, Shinji Saito, Keisuke Hosokawa, Yasunobu Ogawa, Satoshi Kurita, Satonori Nozawa, Hiroshi Miyaoka, Yoshimasa Tanaka, and Ryoichi Fujii
  • Organizer: International HEPPA-SOLARIS Workshop
  • Int'l Joint Research / Invited
• [Presentation] New insights found from coalescence of the ionospheric and thermospheric measurements at auroral latitudes (2018)
  • Author(s): Oyama, S., Mark G. Conde, Anita Aikio, Esa Turunen, Kirsti Kauristie, Heikki Vanhamaki, Ilkka Virtanen, Urban Brondstrom, Thomas Ulich, Lei Cai, Abiyot Workayehu, Kazuo Shiokawa, Mamoru Ishii, Masafumi Hirahara, Cristopher Fallen, Brenton J. Watkins
  • Organizer: 45am Optical Meeting
  • Int'l Joint Research / Invited
• [Presentation] SDI-3D project: measurements of the thermosphere (2018)
  • Author(s): Oyama, S., Mark G. Conde, Anita Aikio, Esa Turunen, Kirsti Kauristie, Heikki Vanhamaki, Ilkka Virtanen, Urban Brondstrom, Thomas Ulich, Lei Cai, Abiyot Workayehu, Kazuo Shiokawa, Mamoru Ishii, Masafumi Hirahara, Takeshi Sakanoi, Yoshimasa Tanaka, Cristopher Fallen, and Brenton J. Watkins
  • Organizer: 2nd Nordic Observatory Meeting
  • Int'l Joint Research
• [Presentation] Dynamics of the polar thermospheric wind and substorm phases (2018)
  • Author(s): Oyama, S., A. Aikio, L. Cai, M. G. Conde, E. Turunen, K. Kauristie, H. Vanhamaki, I. Virtanen, U. Brondstrom, T. Ulich, A. Workayehu, K. Shiokawa, Heqiucen Xu, M. Ishii, M. Hirahara, T. Sakanoi, Y. Tanaka, C. Fallen, B. J. Watkins, M. Orispaa, and Y. Ogawa
  • Organizer: AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Energetic electron precipitation and auroral morphology at the substorm recovery phase (2018)
  • Author(s): Oyama, S., Antti Kero, Craig J. Rodge, Mark A. Clilverd, Yoshizumi Miyoshi, Noora Partamies, Esa Turunen, Tero Raita, Pekka T. Verronen, and Shinji Saito
  • Organizer: ISAR-5
  • Int'l Joint Research
• [Presentation] Beyond present understanding of Magnetosphere-Ionosphere-Thermosphere-Mesosphere coupled system at high latitudes: planning instruments to be collaborated with the EISCAT_3D (2018)
  • Author(s): Oyama, S., Anita Aikio, Mark Conde, Heikki Vanhamaki, Ilkka Virtanen, Lei Cai, Esa Turunen, Antti Kero, Thomas Ulich, and Pekka Verronen
  • Organizer: Sodankyla Observatory Days
  • Int'l Joint Research
• [Presentation] Energetic electron precipitation and auroral morphology at the substorm recovery phase (2017)
  • Author(s): Oyama, S., A. Kero, C. J Rodger, M. A Clilverd, Y. Miyoshi, N. Partamies, E. Turunen, T. Raita, P. T Verronen, and S. Saito
  • Organizer: JpGU
  • Int'l Joint Research
• [Presentation] Lower thermospheric wind variations in auroral patches during the substorm recovery phase (2017)
  • Author(s): Oyama, S., K. Shiokawa, Y. Miyoshi, K. Hosokawa, B. J. Watkins, J. Kurihara, T. T. Tsuda, and C. T. Fallen
  • Organizer: EISCAT symposium
  • Int'l Joint Research
• [Presentation] Energetic electron precipitation and auroral morphology at the substorm recovery phase (2017)
  • Author(s): Oyama, S., A. Kero, C. J Rodger, M. A Clilverd, Y. Miyoshi, N. Partamies, E. Turunen, T. Raita, P. T Verronen, and S. Saito
  • Organizer: EISCAT symposium
  • Int'l Joint Research
• [Presentation] Evaluation of the auroral molecular-emission effects on the atomic line at 777.4 nm (2017)
  • Author(s): Oyama, S., K. Hosokawa, Y. Ogawa, Y. Miyoshi, T. T. Tsuda, S. Kurita, A. Kero, R. Fujii, S. Nozawa, H. Miyaoka, Y. Tanaka, A. Mizuno, and T. Kawabata
  • Organizer: SGEPSS
• [Presentation] PULSTAT study: energetic particle precipitation effects on the ionosphere (2017)
  • Author(s): Oyama, S
  • Organizer: CHAMOS workshop
  • Int'l Joint Research
• [Presentation] ARASE and Japanese observation activities at northern high latitudes (2017)
  • Author(s): Oyama, S., Y. Miyoshi, K. Hosokawa, K. Shiokawa, PWING team, PsA team
  • Organizer: CHAMOS workshop
  • Int'l Joint Research
• [Presentation] Energetic electron precipitation and auroral morphology at the substorm recovery phase (2017)
  • Author(s): Oyama, S., A. Kero, C. J. Rodger, M. A. Clilverd, Y. Miyoshi, N. Partamies, E. Turunen, T. Raita, P. T. Verronen, and S. Saito
  • Organizer: AGU Fall Meetng
  • Int'l Joint Research
• [Presentation] Lower-thermospheric wind variations in auroral patches during the substorm recovery phase (2016)
  • Author(s): Oyama, S., Kazuo Shiokawa, Yoshizumi Miyoshi, Keisuke Hosokawa, Brenton J. Watkins, Junichi Kurihara, Takuo T. Tsuda, and Christopher T. Fallen
  • Organizer: American Geophysical Union Fall meeting 2016
  • Place of Presentation: 米国・サンフランシスコ
  • Year and Date: 2016-12-12
  • Int'l Joint Research
• [Presentation] サブストーム回復相における脈動オーロラパッチと下部熱圏風速変動 (2016)
  • Author(s): Oyama, S., Kazuo Shiokawa, Yoshizumi Miyoshi, Keisuke Hosokawa , Brenton J. Watkins, Junichi Kurihara, Takuo T. Tsuda , and Christopher T. Fallen
  • Organizer: 第140回 地球電磁気・地球惑星圏学会
  • Place of Presentation: 博多
  • Year and Date: 2016-11-20