サブストーム回復相における極域熱圏でのエネルギー収支の解明

2017 Fiscal Year Research-status Report

• Project/Area Number: 16K05569
• Research Institution: Nagoya University
• Principal Investigator: 大山 伸一郎 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
• Keywords: 極域 / 熱圏 / オーロラ / 電離圏 / ファブリペロー干渉計

Outline of Annual Research Achievements

ノルウェー・トロムソ観測所に設置したファブリペロー干渉計と光学カメラを用いたオーロラと熱圏風速の測定を実施した。別予算で同観測所に配置した高速撮像カメラとの同時測定にも成功し、脈動オーロラに代表される時間変動の速いオーロラ発生時における熱圏応答を研究する貴重なデータを取得できた。
フィンランド・オウル大学との協同研究を推進し、サブストーム相における熱圏風速の応答の特徴を解析した（論文投稿済み：１本、投稿準備中：１本）。
熱圏風速の２次元分布を測定することができる熱圏大気プロファイラの導入に向けた国際プロジェクトを立ち上げ、準備活動を開始した。

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

当初予定していた観測期間に装置は順調に稼働し、研究対象のオーロラ現象にも恵まれた。解析を国際共同研究として推進し、論文執筆も順調に進んでいる。次の研究活動を見越した準備作業を国際協力の下、開始することができた。

Strategy for Future Research Activity

平成３０年度が本事業の最終年度に当たり、これまでに得られた観測データの解析を進め論文執筆および学会発表を行う。熱圏大気プロファイラの国際プロジェクトを推進する。

Causes of Carryover

本科研費は追加採択のため初年度はほとんど活動する時間がなかったため、その影響が現収支に影響している。実質的活動時間が短い分、ペースを上げて研究活動をしているので進捗には影響ない。

Research Products

• [Int'l Joint Research] University of Oulu/Sodankyla Geophysical Observatory/Finnish Meteorological Institute(フィンランド)
  • Country Name: FINLAND
  • Counterpart Institution: University of Oulu/Sodankyla Geophysical Observatory/Finnish Meteorological Institute
• [Int'l Joint Research] IRF(スウェーデン)
  • Country Name: SWEDEN
  • Counterpart Institution: IRF
• [Int'l Joint Research] UNIS(ノルウェー)
  • Country Name: NORWAY
  • Counterpart Institution: UNIS
• [Int'l Joint Research] GI UAF(米国)
  • Country Name: U.S.A.
  • Counterpart Institution: GI UAF
• [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 and 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 and 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: Journal of Geophysical Research: Space Physics 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: Journal of Geophysical Research: Space Physics Volume: 122 Pages: 10,864～10,875
  • 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 and Space Volume: 69 Pages: 1～21
  • DOI: 10.1186/s40623-017-0745-9
  • Peer Reviewed / Open Access / 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