Role of non-uniform ionosphere in the formation of auroral vortices revealed by tomography method

• Project/Area Number: 17K05672
• 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: National Institute of Polar Research
• Principal Investigator: Tanaka Yoshimasa 国立極地研究所, 研究教育系, 特任准教授 (50425766)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2017: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: オーロラ / 磁気圏電離圏結合 / トモグラフィ解析 / 電離圏電気伝導度 / 3次元電流系 / 電離圏カウリング効果 / オーロラトモグラフィ / オーロラ渦構造 / 全天並列高感度カメラシステム / オーロラ立体構造再構成 / Westward Traveling Surge / オーロラ多点観測 / 全天並列カメラシステムの構築 / オーロラトモグラフィ国際共同キャンペーン観測 / EISCATレーダー特別実験 / 地球電磁気 / 超高層物理学

Outline of Final Research Achievements

We established a new method based on the auroral tomography to retrieve various physical quantities of mesoscale aurora, such as three-dimensional (3D) distribution of volume emission rate, energy distribution of precipitating electrons, and electrical conductivity, electric field, and 3D electric current system in the ionosphere, with a time resolution less than 10s. We applied this method to data obtained with multi-point imager network, magnetometer network, and incoherent scatter radar in the northern Scandinavia. We succeeded to obtain 3D current system of auroral vortices in the discrete aurora, which change their form quickly, and further to extract the component due to the ionospheric Cowling effect included in the current system.

Academic Significance and Societal Importance of the Research Achievements

これまで水平2次元の研究が主だったオーロラ研究を3次元に拡張し、イメージャや磁力計等の地上多点観測網のデータを最大限活用することで、電離圏磁気圏結合過程における様々な物理量を10秒以下の高い時間分解能で導出できること、電離圏の能動的役割を抽出できることを示したという点で本研究の学術的意義は大きい。開発した手法は、2022年頃から観測が始まる国際共同プロジェクトEISCAT_3Dと組み合わせることで、新しい極域電離圏3次元観測・研究に寄与する。本成果は、地上総合観測によって地球近傍宇宙空間と極域超高層大気の結合過程を時々刻々とモニターできる可能性を示しており、宇宙天気研究の発展に貢献する。

Research Products

• [Int'l Joint Research] Swedish Institute of Space Physics(スウェーデン)
• [Int'l Joint Research] The Arctic University of Norway(ノルウェー)
• [Int'l Joint Research] Finnish Meteorological Institute/Sodankyla Geophysical Observatory/University of Oulu(フィンランド)
• [Int'l Joint Research] Swedish Institute of Space Physics(スウェーデン)
• [Int'l Joint Research] The Arctic University of Norway(ノルウェー)
• [Int'l Joint Research] Finnish Meteorological Institute/Sodankyla Geophysical Observatory/University of Oulu(フィンランド)
• [Int'l Joint Research] Swedish Institute of Space Physics(スウェーデン)
• [Int'l Joint Research] Finnish Meteorological Institute/Sodankyla Geophysical Observatory/University of Oulu(フィンランド)
• [Int'l Joint Research] The Arctic University of Norway(ノルウェー)
• [Journal Article] Development of low-cost multi-wavelength imager system for studies of aurora and airglow (2020)
  • Author(s): Ogawa, Y., Y. Tanaka, A. Kadokura, K. Hosokawa, Y. Ebihara, T. Motoba, B. Gustavsson, U. Brandstrom, Y. Sato, S. Oyama, M. Ozaki, T. Raita, F. Sigernes, S. Nozawa, K. Shiokawa, M. Kosch, K. Kauristie, C. Hall, S. Suzuki, Y. Miyoshi, A. Gerrard, H. Miyaoka, and R. Fujii
  • Journal Title: Polar Science Volume: 23 Pages: 1-10
  • DOI: 10.1016/j.polar.2019.100501
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Direct comparison between magnetospheric plasma waves and polar mesosphere winter echoes in both hemispheres (2019)
  • Author(s): Tanaka, Y.-M., T. Nishiyama, A. Kadokura, M. Ozaki, Y. Miyoshi, K. Shiokawa, S.-I. Oyama, R. Kataoka, M. Tsutsumi, K. Nishimura, K. Sato, Y. Kasahara, A. Kumamoto, F. Tsuchiya, M. Fukizawa, M. Hikishima, S. Matsuda, A. Matsuoka, I. Shinohara, M. Nose, T. Nagatsuma, M. Shinohara, A. Fujimoto, M. Teramoto, 他5名
  • Journal Title: J. Geophys. Res. Volume: 124 Issue: 11 Pages: 1-14
  • DOI: 10.1029/2019ja026891
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Morphologies of omega band auroras (2017)
  • Author(s): Sato, N., A. S. Yukimatu, Y. Tanaka, and T. Hori
  • Journal Title: Earth, Planets and Space Volume: 69 Issue: 1 Pages: 1-11
  • DOI: 10.1186/s40623-017-0688-1
  • Peer Reviewed / Open Access
• [Presentation] Study on auroral 3D structure in the northen Europe (2020)
  • Author(s): Yoshimasa Tanaka, Yasunobu Ogawa, Akira Kadokura, Takanori Nishiyama, Akimasa Yoshikawa, Bjorn Gustavsson, Kirsti Kauristie, Carl-fredrik Enell, Urban Brandstrom, Tima Sergienko, Alexander Kozlovsky, Tero Raita, Vanhamaki Heikki
  • Organizer: Sixth International Symposium on Arctic Research (ISAR-6)
  • Int'l Joint Research
• [Presentation] Conjugate observation of magnetospheric plasma waves and polar mesosphere winter echoes by Arase satellite and MST radars in both hemispheres (2019)
  • Author(s): Yoshimasa Tanaka, Takanori Nishiyama, Akira Kadokura, Mitsunori Ozaki, Mitsunori Ozaki, Yoshizumi Miyoshi, Kazuo Shiokawa, Shin-Ichiro Oyama, Ryuho Kataoka, Masaki Tsutsumi, Koji Nishimura, Kaoru Sato, Yoshiya Kasahara, Atsuki Kumamoto, Fuminori Tsuchiya, Mizuki Fukizawa, Mitsuru Hikishima, Shoya Matsuda
  • Organizer: The 4th Asia Research Node Symposium on Humanosphere Science
  • Int'l Joint Research
• [Presentation] Simultaneous observation of magnetospheric plasma waves and PMWE observed by Arase satellite and MST radars (2019)
  • Author(s): Yoshimasa Tanaka, Takanori Nishiyama, Akira Kadokura, Mitsunori Ozaki, Mitsunori Ozaki, Yoshizumi Miyoshi, Kazuo Shiokawa, Shin-Ichiro Oyama, Ryuho Kataoka, Masaki Tsutsumi, Koji Nishimura, Kaoru Sato, Yoshiya Kasahara, Atsuki Kumamoto, Fuminori Tsuchiya, Mizuki Fukizawa, Mitsuru Hikishima, Shoya Matsuda
  • Organizer: SuperDARN Workshop 2019
  • Int'l Joint Research / Invited
• [Presentation] Advanced tools for research on upper atmosphere and their future perspective (2019)
  • Author(s): Yoshimasa Tanaka, Norio Umemura, Atsuki Shinbori, Shuji Abe, Satoru UeNo, Masahito Nose
  • Organizer: World Data System Asia-Oceania Conference 2019
  • Int'l Joint Research
• [Presentation] 3D structure of discrete arcs obtained by auroral computed tomography analysis (2019)
  • Author(s): Yoshimasa Tanaka, Yasunobu Ogawa, Akira Kadokura, Takanori Nishiyama, Akimasa Yoshikawa, Bjorn Gustavsson, Kirsti Kauristie, Carl-fredrik Enell, Urban Brandstrom, Tima Sergienko, Alexander Kozlovsky, Tero Raita, Vanhamaki Heikki
  • Organizer: The Tenth Symposium on Polar Science
• [Presentation] 3D analysis of discrete arcs based on auroral computed tomography (2019)
  • Author(s): Yoshimasa Tanaka, Yasunobu Ogawa, Akira Kadokura, Takanori Nishiyama, Akimasa Yoshikawa, Bjorn Gustavsson, Kirsti Kauristie, Carl-fredrik Enell, Urban Brandstrom, Tima Sergienko, Alexander Kozlovsky, Tero Raita, Vanhamaki Heikki
  • Organizer: 地球電磁気・地球惑星圏学会第145回総会・講演会
• [Presentation] New perspectives on coupling processes in solar-terrestrial system obtained by comprehensive data analysis (2019)
  • Author(s): Yoshimasa Tanaka, Norio Umemura, Shuji Abe, Atsuki Shinbori, Masahito Nose, Satoru UeNo, Hiromi Nakagawa
  • Organizer: Japan Geoscience Union Meeting 2019
• [Presentation] 一般化オーロラトモグラフィ法逆問題解析手法 (2019)
  • Author(s): 田中良昌, 小川泰信, 門倉昭
  • Organizer: 太陽地球系物理学分野のデータ解析手法、ツールの理解と応用
• [Presentation] あらせ衛星と地上南北共役点観測による磁気圏、電離圏、中間圏現象の比較解析 (2019)
  • Author(s): 田中良昌, 西山尚典, 門倉昭, 尾崎光紀, 三好由純, 大山伸一郎, 片岡龍峰, 堤雅基, 西村耕司, 佐藤薫, 笠原禎也, 熊本篤志, 土屋史紀, 吹澤瑞貴, 疋島充, 松田昇也, 松岡彩子, 篠原育, 能勢正仁, 長妻努, 篠原学, 藤本晶子, 寺本万里子, 野村麗子, 行松彰, 細川敬祐, 小路真史, Ralph Latteck
  • Organizer: 第11回ERGサイエンス会議 - あらせ衛星の電場・プラズマ波動観測データを用いた解析ワークショップ
  • Invited
• [Presentation] 太陽地球結合過程の研究のためのデータ解析基盤「IUGONETツール」の紹介 (2019)
  • Author(s): 田中良昌, 梅村宜生, 新堀淳樹, 阿部修司, 上野悟, 能勢正仁, 中川裕美, IUGONETプロジェクトチーム
  • Organizer: 2019年度太陽研連シンポジウム
• [Presentation] Preliminary Results of Tomography Analysis of Westward Traveling Surge (2018)
  • Author(s): Yoshimasa Tanaka, Yasunobu Ogawa, Akira Kadokura, Takanori Nishiyama, Bjorn Gustavsson, Kirsti Kauristie, Carl-fredrik Enell, Urban Brandstrom, Tima Sergienko, Alexander Kozlovsky, Tero Raita, Vanhamaki Heikki, and Akimasa Yoshikawa
  • Organizer: The Ninth Symposium on Polar Science
• [Presentation] Tomography analysis of westward traveling surge observed in February, 2018 (2018)
  • Author(s): 田中良昌, 小川泰信, 門倉昭, 西山尚典, 吉川顕正, Gustavsson Bjorn, Kauristie Kirsti, Enell Carl-fredrik, Brandstrom Urban, Sergienko Tima, Kozlovsky Alexander, Tero Raita, Vanhamaki Heikki
  • Organizer: 地球電磁気・地球惑星圏学会第144回総会・講演会
• [Presentation] あらせ衛星-地上同時観測で得られたPMWEの特性 (2018)
  • Author(s): Yoshimasa Tanaka et al.
  • Organizer: H30年度脈動オーロラ研究集会
• [Presentation] 超高層大気分野のデータ利活用促進、成果創出のための取り組み (2018)
  • Author(s): 田中良昌, 梅村宜生, 新堀淳樹, 阿部修司, 能勢正仁, 上野悟, IUGONETプロジェクトチーム
  • Organizer: 第5回 太陽地球環境データ解析に基づく超高層大気の空間・時間変動の解明
• [Presentation] 太陽地球系物理学における観測データメタデータシステムとサイエンス (2018)
  • Author(s): 田中良昌, 梅村宜生, 新堀淳樹, 阿部修司, 能勢正仁, 上野悟, IUGONETプロジェクトチーム
  • Organizer: Japan Open Science Summit 2018
• [Presentation] 3D current system of eastward expanding auroral surges (2018)
  • Author(s): Yoshimasa Tanaka, Yasunobu Ogawa, Akira Kadokura, Bjorn Gustavsson, Noora Partamies, Kirsti Kauristie, Daniel Whiter, Carl-fredrik Enell, Urban Brandstrom, Tima Sergienko, Alexander Kozlovsky, Heikki Vanhamaki, Akimasa Yoshikawa, Hiroshi Miyaoka
  • Organizer: Japan Geoscience Union Meeting 2018
• [Presentation] Simultaneous observation of PMWE and plasma waves with PANSY radar and Arase satellite (2018)
  • Author(s): Yoshimasa Tanaka et al.
  • Organizer: Japan Geoscience Union Meeting 2018
  • Invited
• [Presentation] IUGONET activities for research in upper atmosphere and multidisciplinary field (2018)
  • Author(s): Yoshimasa Tanaka, Norio Umemura, Shuji Abe, Atsuki Shinbori, Masahito Nose, Satoru UeNo
  • Organizer: Japan Geoscience Union Meeting 2018
• [Presentation] Useful Tools for Education and Capacity Building about Solar Terrestrial Physics Study (2018)
  • Author(s): Yoshimasa Tanaka, Norio Umemura, Atsuki Shinbori, Shuji Abe, Satoru UeNo, Masahito Nose, and IUGONET project team
  • Organizer: International Workshop on Data Science 2018
  • Int'l Joint Research
• [Presentation] Poleward moving auroral arcs observed at South Pole Station, Antarctica (2018)
  • Author(s): Yoshimasa Tanaka, Yusuke Ebihara, Satoko Saita, Akimasa Yoshikawa, Yuki Obana, and Allan T. Weatherwax
  • Organizer: Asian Forum for Polar Sciences (AFoPS) 2018
• [Presentation] Activity for Data Sharing by the IUGONET project (2018)
  • Author(s): Yoshimasa Tanaka, Norio Umemura, Shuji Abe, Atsuki Shinbori, Masahito Nose, Satoru UeNo
  • Organizer: Asian Forum for Polar Sciences (AFoPS) 2018
• [Presentation] Multi-instrument observation of an isolated substorm and associated phenomena (2018)
  • Author(s): Tanaka, Y.-M., T. Nishiyama, A. Kadokura, M. Ozaki, K. Shiokawa, S. Oyama, M. Nose, T. Nagatsuma, M. Tsutsumi, K. Nishimura, K. Sato, Y. Miyoshi, Y. Kasahara, A. Kumamoto, F. Tsuchiya, M. Hikishima, S. Matsuda, A. Matsuoka, M. Shinohara, A. Fujimoto, M. Teramoto, R. Nomura, R. Kataoka, A. S. Yukimatu
  • Organizer: Fifth International Symposium on Arctic Research (ISAR-5)
  • Int'l Joint Research
• [Presentation] ノルウェー・シーボトンにおける全天ワテック並列イメージャ観測 (2018)
  • Author(s): 田中良昌, 小川泰信, 門倉昭, 宮岡宏, Bjorn Gustavsson
  • Organizer: 低廉光学機器による超高層大気ネットワーク計測に関する研究集会
• [Presentation] EISCAT特別実験報告（実験番号01）多点・多波長単色イメージャとEISCATレーダーを用いたオーロラ降下電子エネルギーの時空間変動の観測 (2018)
  • Author(s): 田中良昌, 小川泰信, 門倉昭, 宮岡宏, Kirsti Kauristie, Alexandre Kozlovsky, Urban Brandstrom, Tima Sergienko, Carl-Fredrik Enell, Bjorn Gustavsson, Daneil Whiter, Ingemar Haggstrom
  • Organizer: EISCAT研究集会
• [Presentation] Spatiotemporal variation of precipitating electron energy in auroral vortices (2017)
  • Author(s): Yoshimasa Tanaka, Yasunobu Ogawa, Akira Kadokura, Kauristie Kirsti, Carl-fredrik Enell, Urban Braendstroem, Tima Sergienko, Bjorn Gustavsson, Daniel Whiter, Alexander Kozlovsky, Hiroshi Miyaoka, Mike Kosch
  • Organizer: JpGU-AGU joint meeting 2017
• [Presentation] IUGONET activities for upper atmospheric research (2017)
  • Author(s): Yoshimasa Tanaka, Norio Umemura, Shuji Abe, Atsuki Shinbori, Satoru UeNo, Masahito Nose
  • Organizer: International Conference on Space Science and Communication 2017
  • Int'l Joint Research / Invited
• [Presentation] IUGONET tools for Solar-Terrestrial Physics Research (2017)
  • Author(s): Yoshimasa Tanaka, Norio Umemura, Shuji Abe, Atsuki Shinbori, Masahito Nose, Satoru UeNo
  • Organizer: The Second VarSITI symposium
  • Int'l Joint Research / Invited
• [Presentation] A comprehensive analysis of an isolated substorm observed during the first coordinated Arase and ground-based observations (2017)
  • Author(s): Tanaka, Y.-M., T. Nishiyama, A. Kadokura, M. Ozaki, K. Shiokawa, S. Oyama, M. Nose, T. Nagatsuma, M. Tsutsumi, K. Nishimura, K. Sato, Y. Miyoshi, Y. Kasahara, A. Kumamoto, F. Tsuchiya, M. Hikishima, S. Matsuda, A. Matsuoka, M. Shinohara, A. Fujimoto, M. Teramoto, R. Nomura, R. Kataoka, A. S. Yukimatu
  • Organizer: 地球電磁気・地球惑星圏学会第142回総会・講演会
• [Presentation] An isolated substorm observed during the first coordinated Arase and ground-based observations (2017)
  • Author(s): Tanaka, Y.-M., T. Nishiyama, A. Kadokura, M. Ozaki, K. Shiokawa, S. Oyama, M. Nose, T. Nagatsuma, M. Tsutsumi, K. Nishimura, K. Sato, Y. Miyoshi, Y. Kasahara, A. Kumamoto, F. Tsuchiya, M. Hikishima, S. Matsuda, A. Matsuoka, M. Shinohara, A. Fujimoto, M. Teramoto, R. Nomura, R. Kataoka, A. S. Yukimatu
  • Organizer: 第8回極域科学シンポジウム