High-time resolution optical observation of auroras in the Canadian arctic

2009 Fiscal Year Self-evaluation Report

• Project/Area Number: 19403010
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 海外学術
• Research Field: Space and upper atmospheric physics
• Research Institution: Nagoya University (2007, 2009-2010); University of Toyama (2008)
• Principal Investigator: OGAWA Tadahiko Nagoya University, 太陽地球環境研究所, 名誉教授 (60271607)
• Project Period (FY): 2007 – 2010
• Keywords: オーロラ / 極冠域プラズマパッチ / 大気重力波 / 人工衛星-地上共同観測 / サブストーム / 磁気嵐 / 国際情報交換 / カナダ:アメリカ

Research Abstract

平成17年度から、カナダ北極域のレゾリュートベイ(磁気緯度83度)及びアサバスカ(磁気緯度62度)に、特定の発光輝線をフィルターを通して観測する高感度分光全天カメラを設置し、極冠域及びサブオーロラ帯におけるオーロラと夜間大気光の定常観測を、2分の時間分解能で継続している。本研究では、上記の高感度分光観測に加えて、1/30秒の高時間分解能でオーロラの変動を観測することのできる全天カメラをカナダの2カ所で運用することにより、サブストームに伴うオーロラの微細構造を高時間分解能で観測し、その伝搬速度や、太陽風電場の侵入に対する応答を明らかにすることを目的とする。

Research Products

• [Journal Article] Rayleigh-Taylor type instability in auroral patches (2010)
  • Author(s): Shiokawa, K., A. Nakajima, A. Ieda, K. Sakaguchi, R. Nomura, T. Aslaksen, M. Greffen, E. Donovan
  • Journal Title: J.Geophys.Res. 115 Pages: A02211
  • Peer Reviewed
• [Journal Article] Reorganization of polar cap patches through shears in the background plasma convection (2010)
  • Author(s): Hosokawa, K., J.-P. St-Maurice, G. J. Sofko, K. Shiokawa, Y. Otsuka, T. Ogawa
  • Journal Title: J.Geophys.Res. 115 Pages: A01303
  • Peer Reviewed
• [Journal Article] Longitudinal development of a substorm brightening arc (2009)
  • Author(s): Shiokawa, K., A. Ieda, A. Nakajima, K. Sakaguchi, R. Nomura, T. Aslaksen, M. Greffen, E. Spanswick, E. Donovan, S. B. Mende, J. McFadden, K.-H. Glassmeier
  • Journal Title: Ann.Geophys. 27 Pages: 1935-1940
  • Peer Reviewed
• [Journal Article] Fine structures and dynamics in auroral initial brightening at substorm onsets (2009)
  • Author(s): Sakaguchi, K., K. Shiokawa, A. Ieda, R. Nomura, A. Nakajima, M. Greffen, E. Donovan, I. R. Mann, H. Kim, M. Lessard
  • Journal Title: Ann.Geophys. 27 Pages: 623-630
  • Peer Reviewed
• [Journal Article] Relationship between polar cap patches and field-aligned irregularities as observed with an all-sky airglow imager at Resolute Bay and the PolarDARN radar at Rankin Inlet (2009)
  • Author(s): Hosokawa, K., K. Shiokawa, Y. Otsuka, T. Ogawa, J. P. St-Maurice, G. J. Sofko, D. A. Andre
  • Journal Title: J.Geophys.Res. 114 Pages: A03306
  • Peer Reviewed
• [Journal Article] Motion of polar cap patches : A statistical study with all-sky airglow imager at Resolute Bay, Canada (2009)
  • Author(s): Hosokawa, K., T. Kashimoto, S. Suzuki, K. Shiokawa, Y. Otsuka, T. Ogawa
  • Journal Title: J.Geophys.Res. 114 Pages: A04318
  • Peer Reviewed
• [Journal Article] Unusually elongated, bright airglow plume in the polar cap F region : Is it a tongue of ionization? (2009)
  • Author(s): Hosokawa, K., T. Tsugawa, K. Shiokawa, Y. Otsuka, T. Ogawa, M. R. Hairston
  • Journal Title: Geophys.Res.Lett. 36 Pages: L07103
  • Peer Reviewed
• [Journal Article] Azimuthal structures of ray auroras at the beginning of auroral substorms (2009)
  • Author(s): Sakaguchi, K., K. Shiokawa, E. Donovan
  • Journal Title: Geophys.Res.Lett. 36 Pages: L23106
  • Peer Reviewed
• [Journal Article] GPS total electron content variations associated with a polar cap arc (2009)
  • Author(s): Jayachandran, P. T., K. Hosokawa, J. W. MacDougall, S. Mushini, R. B. Langley, K. Shiokawa
  • Journal Title: J.Geophys.Res. 114 Pages: A12304
  • Peer Reviewed
• [Presentation] Periodic black auroras at the dawn-side dipolarization front during a substorm (2010)
  • Author(s): Sakaguchi, K., K. Shiokawa, A. Nakajima, E. Donovan, T. Tronsen, K. H. Glassmeier
  • Organizer: International Conference on Substorms-10 (ICS-10)
  • Place of Presentation: San Luis Obispo, California
  • Year and Date: 20100322-20100326
• [Presentation] Evolution of wave numbers in auroral structures at a substorm onset (2009)
  • Author(s): Sakaguchi, K., K. Shiokawa, Y. Hiraki, E. Donovan
  • Organizer: AGU Joint Assembry
  • Place of Presentation: Toronto, Canada
  • Year and Date: 20090524-20090527
• [Remarks] カナダでのオーロラキャンペーン観測の情報は下記 web ページで公開している
  • URL: http://stdb2.stelab.nagoya-u.ac.jp/canada/campaign/canada_campaign.html
• [Remarks] また、Resolute Bay, Athabasca の定常観測のデータは下記2カ所の Web ページで公開している
  • URL: http://stdb2.stelab.nagoya-u.ac.jp/div2/data.html
• [Remarks]
  • URL: http://stdb2.stelab.nagoya-u.ac.jp/omti/index.html