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2010 Fiscal Year Annual Research Report

オーロラの南北半球共役性とその太陽活動依存性の研究

Research Project

Project/Area Number 21403007
Research InstitutionNational Institute of Polar Research

Principal Investigator

佐藤 夏雄  国立極地研究所, 研究教育系, 教授 (50132709)

Co-Investigator(Kenkyū-buntansha) 岡野 章一  東北大学, 大学院・理学研究科, 教授 (10004483)
小野 高幸  東北大学, 大学院・理学研究科, 教授 (10141996)
山岸 久雄  国立極地研究所, 研究教育系, 教授 (20132714)
門倉 昭  国立極地研究所, 研究教育系, 准教授 (70185883)
田口 真  立教大学, 理学部, 教授 (70236404)
Keywords宇宙科学 / 磁気圏・電離圏 / 超高層物理学 / オーロラ物理学 / 極域科学 / 南極昭和基地 / アイスランド / 共役点
Research Abstract

本研究は、地上からの南北共役点観測が地球上で唯一可能である利点を最大限活用し、オーロラの形状や動き、発光強度とスペクトルを高精度で同時観測し、南北半球間の対称性・非対称性の特性を定量的に明らかにする。そして、非対称性を起こす原因を太陽風-磁気圏-電離圏相互作用の観点から探ることにより、オーロラ発生機構の本質を解き明かすことを目的としている。
平成22年度の現地観測では、前年度同様に、共役点での可視オーロラの同時観測が可能な秋分期の9月にアイスランドにおいて南極昭和基地とのオーロラ同時観測を実施した。アイスランド・フッサフェル観測拠点では、前年度持ち帰り修理した8CH掃天フォトメータを再設置し自動運用を行った他、全天単色イメージャや簡易型高感度カメラ(Watec)の自動運用も行った。またイメージングリオメータデータ収録部の更新や、MF帯オーロラ電波観測装置の保守・改良なども行った。チョルネス観測点においては、Watecシステムを新たに一式追加設置し自動運用を行った他、老朽化したイメージングリオメータの撤去作業などを行った。アイスランドと昭和基地からのWatecデータやイメージングリオメータデータは、準リアルタイムに極地研の計算機システムに伝送され、観測終了後はサマリプロットを自動作成し、それらをWeb上で見ることができるシステムの構築も進めた。9月13-14日には比較的静かなオーロラ活動ではあったが昭和基地との間での同時観測に成功した。また、9月7-8日には、アイスランド側だけではあったが、非常に活発な脈動オーロラが観測され、アイスランドの大型短波レーダーとの同時観測に成功した。オーロラ観測機器が自動運用されるようになったため、人が滞在した9月の共役点期間のみではなく、翌年3月の共役点期間にも、昭和基地との間でオーロラ共役点同時観測データを取得することが出来た。

  • Research Products

    (45 results)

All 2011 2010

All Journal Article (17 results) (of which Peer Reviewed: 17 results) Presentation (28 results)

  • [Journal Article] Displacement of conjugate points during a substorm in a global MHD simulation2011

    • Author(s)
      Saita, S., A.Kadokura, N.Sato, S.Fujita, T.Tanaka, Y.Ebihara, S.Ohtani, G.Ueno, K.Murata, D.Matsuoka, A.Kitamoto, T.Higuchi
    • Journal Title

      Journal of Geophysical Research

      Volume: (In print)

    • Peer Reviewed
  • [Journal Article] In-situ evidence for IMF-induced tail twisting associated with relative displacement of conjugate auroral features2011

    • Author(s)
      Motoba, T., K.Hosokawa, Y.Ogawa, N.Sato, A.Kadokura, S.C.Buchert, H.Reme
    • Journal Title

      Journal of Geophysical Research

      Volume: (In print)

    • Peer Reviewed
  • [Journal Article] Decrease of auroral intensity associated with reversal of plasma convection in response to an interplanetary shock as observed over Zhongshan station in Antarctica2011

    • Author(s)
      Liu, J.J., H.Q.Hu, D.S.Han, T.Araki, Z.J.Hu, Q.H.Zhang, H.G.Yang, N.Sato, A.S.Yukimatu, Y.E.Ebihara
    • Journal Title

      Journal of Geophysical Research

      Volume: (In print)

    • Peer Reviewed
  • [Journal Article] On the simultaneity of substorm onset between two hemispheres2011

    • Author(s)
      Morioka, A., Y.Miyoshi, F.Tsuchiya, M.Misawa, Y.Kasaba, T.Asozu, S.Okano, A.Kadokura, N.Sato, H.Miyaoka, K.Yumoto, G.K.Parks, F.Honary, J.G.Trotignon, P.M.E.Decreau, B.W.Reinisch
    • Journal Title

      Journal of Geophysical Research

      Volume: (In print)

    • Peer Reviewed
  • [Journal Article] Long-term Data Analysis of Ionosphere over Syowa Station, Antarctica2011

    • Author(s)
      Motoba, T.
    • Journal Title

      Journal of NICT

      Volume: (In print)

    • Peer Reviewed
  • [Journal Article] Long-period ULF waves driven by periodic solar wind disturbances2011

    • Author(s)
      Fujita, S., et al.
    • Journal Title

      IAGA Special Sopron Book Series "The Dynamic Magnetosphere"

      Volume: (In print)

    • Peer Reviewed
  • [Journal Article] On the statistical relation between ion upflow and naturally enhanced ion-acoustic lines observed with the EISCAT Svalbard radar, J.2011

    • Author(s)
      Ogawa, Y., et al
    • Journal Title

      Journal of Geophysical Research

      Volume: 116

    • Peer Reviewed
  • [Journal Article] Simultaneous ground-based and satellite observations of natural VLF wave in Antarctica : A case study of downward ionospheric penetration of whistler-mode waves2010

    • Author(s)
      Ozaki, M., S.Yagitani, I.Nagano, Y.Kasahara, H.Yamagishi, N.Sato, A.Kadokura
    • Journal Title

      Polar Science

      Volume: 4 Pages: 431-441

    • Peer Reviewed
  • [Journal Article] MF/HF auroral radio emissions emanating from the topside ionosphere2010

    • Author(s)
      Sato, Y., T.Ono, N.Sato, R.Fujii
    • Journal Title

      Geophysical Research Letters

      Volume: (In print)

    • Peer Reviewed
  • [Journal Article] Superposed epoch analysis of the ionospheric convection evolution during substorms : IMF By dependence2010

    • Author(s)
      Grocott, A., S.E.Milan, T.K.Yoeman, N.Sato, A.S.Yukimatu, J.A.Wild
    • Journal Title

      Journal of Geophysical Research

      Volume: (In print)

    • Peer Reviewed
  • [Journal Article] Solar activity dependence of ion upflow in the polar ionosphere observed with the European Incoherent Scatter (EISCAT) Tromso UHF radar2010

    • Author(s)
      Ogawa, Y., et al
    • Journal Title

      Journal of Geophysical Research

      Volume: 115 Pages: A07310

    • Peer Reviewed
  • [Journal Article] Initial development of HF radar polar patch caused by azimuthal flow burst in the cusp2010

    • Author(s)
      Taguchi, S., K.Hosokawa, S.Suzuki, A.S.Yukimatu, N.Sato
    • Journal Title

      Journal of Geophysical Research

      Volume: 115 Pages: A05305

    • Peer Reviewed
  • [Journal Article] Plasma irregularities adjacent to auroral patches in the post-midnight sector2010

    • Author(s)
      Hosokawa, K., T.Motoba, A.S.Yukimatu, S.E.Milan, M.Lester, A.Kadokura, N.Sato, G.Bjornsson
    • Journal Title

      Journal of Geophysical Research

      Volume: 115 Pages: A09303

    • Peer Reviewed
  • [Journal Article] Varying IMF By effects on interhemispheric conjugate auroral features during a weak substorm2010

    • Author(s)
      Motoba, T., K.Hosokawa, N.Sato, Kadokura, G.Bjornsson
    • Journal Title

      Journal of Geophysical Research

      Volume: 115 Pages: A09210

    • Peer Reviewed
  • [Journal Article] Modulation of ionospheric conductance and electric field associated with pulsating aurora2010

    • Author(s)
      Hosokawa, K., Y.Ogawa, A.Kadokura, H.Miyaoka, N.Sato
    • Journal Title

      Journal of Geophysical Research

      Volume: 115 Pages: A03201

    • Peer Reviewed
  • [Journal Article] Pedersen current carried by electrons in auroral D-region2010

    • Author(s)
      Hosokawa, K., Y.Ogawa
    • Journal Title

      Geophys.Res.Lett.

      Volume: 37 Pages: L18103

    • Peer Reviewed
  • [Journal Article] MF/HF auroral radio emissions emanating from the topside ionosphere2010

    • Author(s)
      Sato, Y., T.Ono, N.Sato, R.Fujii
    • Journal Title

      Geophys.Res.Lett.

      Volume: 37 Pages: L14102

    • Peer Reviewed
  • [Presentation] Displacement of geomagnetic conjugate points due to substorm-related changes in the near-Earth magnetotail field structure2011

    • Author(s)
      Saita, S., A.Kadokura, N.Sato, S.Fujita, T.Tanaka, Y.Ebihara, S.Ohtani, G.Ueno, K.Murata, D.Matsuoka, T.Higuchi
    • Organizer
      AGU Chapman Conference on Relationship Between Auroral Phenomenology and Magnetospheric Processes
    • Place of Presentation
      Fairbanks, Alaska
    • Year and Date
      2011-03-11
  • [Presentation] Dynamic tracing geomagnetic conjugate points using synchronous auroras2011

    • Author(s)
      Sato, N.
    • Organizer
      AGU Chapman Conference on Relationship Between Auroral Phenomenology and Magnetospheric Processes
    • Place of Presentation
      Fairbanks, Alaska(Invited Talk)
    • Year and Date
      2011-03-03
  • [Presentation] In situ evidence for IMF-induced tail twisting in association with relative displacement of conjugate auroras2011

    • Author(s)
      Motoba, T., et al.
    • Organizer
      AGU Chapman Conference on Relationship Between Auroral Phenomenology and Magnetospheric Processes
    • Place of Presentation
      Fairbanks, Alaska
    • Year and Date
      2011-02-28
  • [Presentation] In situ evidence for IMF-induced tail twisting associated with relative displacement of conjugate auroral features2010

    • Author(s)
      Motoba, T., et al.
    • Organizer
      H22年度国立極地研究所研究集会
    • Place of Presentation
      国立極地研究所(東京)
    • Year and Date
      2010-12-22
  • [Presentation] In situ evidence for IMF-induced tail twisting in association with relative displacement of conjugate auroras2010

    • Author(s)
      Motoba, T., et al.
    • Organizer
      アメリカ地球物理学連合(AGU)
    • Place of Presentation
      San Francisco
    • Year and Date
      2010-12-16
  • [Presentation] Current Status of Upper Atmosphere Physics Observation in Iceland2010

    • Author(s)
      Kadokura, A., et al.
    • Organizer
      Second International Symposium on the Arctic Research (ISAR-2)
    • Place of Presentation
      一ツ橋記念講堂(東京)
    • Year and Date
      2010-12-08
  • [Presentation] 第VIII期における昭和基地オーロラ光学観測2010

    • Author(s)
      門倉昭, 他
    • Organizer
      第34回極域宙空圏シンポジウム
    • Place of Presentation
      国立極地研究所(東京)
    • Year and Date
      2010-12-03
  • [Presentation] Relative displacement of conjugate point during a course of substorm in a global MHD simulation2010

    • Author(s)
      Saita, S., A.Kadokura, N.Sato, S.Fujita, T.Tanaka, Y.Ebihara, S.Ohtani, G.Ueno, K.Murata, D.Matsuoka, A.Kitamoto, T.Higuchi
    • Organizer
      第34回極域宙空圏シンポジウム
    • Place of Presentation
      国立極地研究所(東京)
    • Year and Date
      2010-12-03
  • [Presentation] Statistical and case studies of MF/HF auroral radio emissions emanating from the topside ionosphere2010

    • Author(s)
      Sato, Y., T.Ono, N.Sato, R.Fujii
    • Organizer
      第34回極域宙空圏シンポジウム
    • Place of Presentation
      国立極地研究所(東京)
    • Year and Date
      2010-12-03
  • [Presentation] 磁気共役オーロラの発光強度比較2010

    • Author(s)
      重信薫、田口真、佐藤夏雄、門倉昭
    • Organizer
      第34回極域宙空圏シンポジウム
    • Place of Presentation
      国立極地研究所(東京)
    • Year and Date
      2010-12-02
  • [Presentation] 欧州非干渉散乱(EISCAT)データベースを用いた極域超高層大気研究2010

    • Author(s)
      小川泰信、野澤悟徳、宮岡宏、大山伸一郎、齊藤昭則、元場哲郎、藤井良一
    • Organizer
      地球電磁気・地球惑星圏学会、第128回総会・講演会
    • Place of Presentation
      沖縄県市町村自治会館
    • Year and Date
      2010-11-03
  • [Presentation] 2009年太陽活動極小期の昭和基地におけるオーロラ活動2010

    • Author(s)
      門倉昭, 他
    • Organizer
      地球電磁気・地球惑星圏学会、第128回総会・講演会
    • Place of Presentation
      沖縄県市町村自治会館
    • Year and Date
      2010-11-02
  • [Presentation] Statistical and case studies of MF/HF auroral radio emissions emanating from the topside ionosphere2010

    • Author(s)
      佐藤由佳, 小野高幸, 佐藤夏雄, 藤井良一
    • Organizer
      地球電磁気・地球惑星圏学会、第128回総会・講演会
    • Place of Presentation
      沖縄県市町村自治会館
    • Year and Date
      2010-11-02
  • [Presentation] In situ evidence for IMF-induced tail twisting in association with relative displacement of conjugate auroras2010

    • Author(s)
      元場哲郎, 他
    • Organizer
      地球電磁気・地球惑星圏学会
    • Place of Presentation
      沖縄県市町村自治会館
    • Year and Date
      2010-10-31
  • [Presentation] Akebono Satellite Observations of MF/HF Auroral Radio Emissions Emanating from the Topside Ionosphere2010

    • Author(s)
      Sato, Y., T.Ono, N.Sato, R.Fujii
    • Organizer
      Asia-Pacific Radio Science Conference
    • Place of Presentation
      富山国際会議場
    • Year and Date
      2010-09-24
  • [Presentation] Spatial and temporal tracing of real geomagnetic conjugate point observed by Syowa-Iceland conjugate-pair auroras2010

    • Author(s)
      Sato, N., T.Motoba, A.Kadokura, K.Hosokawa, G.Bjornsson, T.Saemundsson
    • Organizer
      SCAR Open Science Conference
    • Place of Presentation
      Buenos Aires, Argentina(Invited Talk)
    • Year and Date
      2010-08-04
  • [Presentation] Interhemispheric Auroral Features Observed at Syowa-Iceland Conjugate-pair2010

    • Author(s)
      Sato, N.
    • Organizer
      AGU Western Pacific Geophysics Meeting
    • Place of Presentation
      Taipei, Taiwan(Invited Talk)
    • Year and Date
      2010-06-23
  • [Presentation] 南極・昭和基地における電離圏長期変動2010

    • Author(s)
      元場哲郎, 他
    • Organizer
      CAWSESIIキックオフシンポジウム
    • Place of Presentation
      宇治おうばくプラザ(京大宇治キャンパス)
    • Year and Date
      2010-06-17
  • [Presentation] Interhemispheric Conjugacy of Westward Traveling Surge Aurora2010

    • Author(s)
      Sato, N., H.Doi, A.Kadokura, Gunnlaugur Bjornsson, Thorsteinn Saemundsson
    • Organizer
      IPY Oslo Science Conference
    • Place of Presentation
      Oslo, Norway
    • Year and Date
      2010-06-09
  • [Presentation] Reconfiguration of the magnetosphere for southward IMF and displacement of conjugate points in a MHD simulation2010

    • Author(s)
      Saita, S., A.Kadokura, N.Sato, S.Fujita, T.Tanaka, Y.Ebihara, K.Murata, D.Matsuoka, G.Ueno, A.Kitamoto Ebihara, K.Murata, D.Matsuoka, G.Ueno, A.Kitamoto
    • Organizer
      IPY Oslo Science Conference
    • Place of Presentation
      Oslo, Norway
    • Year and Date
      2010-06-09
  • [Presentation] Varying IMF By effects on interhemispheric conjugate auroral features during a weak substorm2010

    • Author(s)
      Motoba, T., et al.
    • Organizer
      IPY Oslo Science Conference
    • Place of Presentation
      Oslo, Norway
    • Year and Date
      2010-06-08
  • [Presentation] Eigenfrequencies of high-latitude geomagnetic field lines in aglobal MHD simulation2010

    • Author(s)
      Saita, S., A.Kadokura, H.Yamagishi, N.Sato, S.Fujita, T.Tanaka, Y.Ebihara, K.Murata, D.Matsuoka, G.Ueno, A.Kitamoto
    • Organizer
      IPY Oslo Science Conference
    • Place of Presentation
      Oslo, Norway
    • Year and Date
      2010-06-08
  • [Presentation] Modulation of Ionosphere Associated with Pulsating Aurora-Observations in Iceland and Norway-2010

    • Author(s)
      Hosokawa, K., Y.Ogawa, A.Kadokura, S.E.Milan, M.Lester, N.Sato
    • Organizer
      IPY Oslo Science Conference
    • Place of Presentation
      Oslo, Norway
    • Year and Date
      2010-06-08
  • [Presentation] 南北共役点オーロラに対するIMF By変動の影響2010

    • Author(s)
      元場哲郎, 他
    • Organizer
      日本地球惑星科学連合2010年大会
    • Place of Presentation
      幕張メッセ(千葉)
    • Year and Date
      2010-05-23
  • [Presentation] auroral roar emissionsの到来方向計測2010

    • Author(s)
      佐藤由佳, 小野高幸, 佐藤夏雄, 藤井良一, 野澤悟徳, 塩川和夫, 門倉昭, 小川泰信, Peter Stauning, Kirsti Kauristie
    • Organizer
      日本地球惑星科学連合2010年大会
    • Place of Presentation
      幕張メッセ(千葉)
    • Year and Date
      2010-05-23
  • [Presentation] On the statistical relation between ion upflow and naturally enhanced ion-acoustic lines observed with the EISCAT Svalbard radar2010

    • Author(s)
      Ogawa, Y, S.C.Buchert, I.Haggstrom, R.Fujii, S.Nozawa, H.Miyaoka
    • Organizer
      European Geosciences Union General Assembly 2010
    • Place of Presentation
      Vienna, Austria(Invited Talk)
    • Year and Date
      2010-05-05
  • [Presentation] Modulation of ionospheric conductance and electric field associated with pulsating aurora2010

    • Author(s)
      Hosokawa, K., Y.Ogawa, A.Kadokura, H.Miyaoka, N.Sato
    • Organizer
      EGU General Assembly
    • Place of Presentation
      Vienna, Austria
    • Year and Date
      2010-05-05
  • [Presentation] 極域における電磁圏ネットワーク観測2010

    • Author(s)
      佐藤夏雄
    • Organizer
      ISWIキックオフシンポジウム
    • Place of Presentation
      福岡リーセントホテル
    • Year and Date
      2010-03-03

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Published: 2012-07-19  

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