A Study of quarter-wave mode standinf Alfven waves using data from a new magnetometer array in New Zealand

• Project/Area Number: 24740333
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Space and upper atmospheric physics
• Research Institution: Osaka Electro-Communication University
• Principal Investigator: OBANA Yuki 大阪電気通信大学, 工学部, 講師 (50398096)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 磁気圏ー電離圏結合 / プラズマ圏 / 空洞共鳴 / 磁力線共鳴 / ULF波 / 国際情報交換 / 磁気圏－電離圏結合 / 磁力線共鳴振動 / ULF波動 / 地磁気脈動 / 磁気圏-電離圏結合 / 海外学術調査

Outline of Final Research Achievements

In order to examine the resonance structure of quarter-wave mode standing Alfven waves, we constructed a new magnetometer array in New Zealand and data from this array were analyzed. Four events are discussed which show extraordinarily low eigenfrequencies, wide resonance widths, and strong damping when the ionosphere above New Zealand was in darkness while the conjugate northern hemisphere ionosphere was sunlit. The wide resonance width and the strong damping of the quarter-wave mode arise from strong energy dissipation in the dark side ionosphere. One event exhibited field line resonance structure continuously through a transition from very low frequency to the normal daytime values. The frequency change began when the dawn terminator passed over New Zealand and finished one hour later. These experimental results were compared with the ULF wave fields obtained from a 2.5-dimensional simulation model.

Research Products

• [Journal Article] CDF data archive and integrated data analysis platform for ERG-related ground data developed by ERG Science Center (ERG-SC) (2015)
  • Author(s): Hori, T., Y. Miyashita, Y. Miyoshi, K. Seki, T. Segawa, Y.-M. Tanaka, K. Keika, M. Shoji, I. Shinohara, K. Shiokawa, Y. Otsuka, S. Abe, A. Yoshikawa, K. Yumoto, Y. Obana, N. Nishitani, A. S. Yukimatu, T. Nagatsuma, M. Kunitake, K. Hosokawa, Y. Ogawa, K. T. Murata, M. Nose, H. Kawano, and T. Sakanoi
  • Journal Title: J. Space Sci. Info. Jpn Volume: JAXA-RR-14-009 Pages: 75-89
  • Peer Reviewed
• [Journal Article] Resonance Structure and Mode Transition of Quarter-Wave ULF Pulsations Around the Dawn Terminator (2015)
  • Author(s): Y. Obana, C. L. Waters, M. D. Sciffer, F. W. Menk, R. L. Lysak, K. Shiokawa, A. W. Hurst, T. Petersen
  • Journal Title: J. Geophys. Res. - Space Physics Volume: 不明 Issue: 6 Pages: 4194-4212
  • DOI: 10.1002/2015ja021096
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Latitudinal Distribution of Quarter-Wave Length Standing Alfvén Modes (2015)
  • Author(s): Y. Obana, F. W. Menk, C. L. Waters, M. D. Sciffer, R. L. Lysak, M. B. Moldwin, I. R. Mann, D. Boteler, V. Angelopoulos, and C. T. Russell
  • Organizer: 26th General Assembly of the International Union of Geodesy and Geophysics
  • Place of Presentation: Prague, Czech Republic, Prague Congress Centre
  • Year and Date: 2015-06-22 – 2015-07-02
• [Presentation] Quarter Waves Localized in the Plasmasphere (2015)
  • Author(s): Y. Obana, F. W. Menk, C. L. Waters, M. D. Sciffer, R. L. Lysak, M. B. Moldwin, I. R. Mann, D. Boteler, V. Angelopoulos, and C. T. Russell
  • Organizer: Japan Geoscience Union Meeting 2015
  • Place of Presentation: 千葉県千葉市、幕張メッセ国際会議場
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] ULF波動を用いたプラズマ圏密度診断：自動化プログラムによる初期解析結果 (2015)
  • Author(s): 尾花由紀, 能勢正仁
  • Organizer: 統計数理研究所共同研究集会「電離圏・磁気圏モデリングとデータ同化」
  • Place of Presentation: 東京都立川市、統計数理研究所
  • Year and Date: 2015-01-09
• [Presentation] ERGプロジェクトにおける連携地上観測ネットワーク (2015)
  • Author(s): 塩川和夫, 藤井良一, 橋本久美子, 細川敬祐, 石井守, 門倉昭, 河野英昭, 菊池崇, 北村健太郎, 三好由純, 長妻努, 西谷望, 尾花由紀, 小川泰信, 大矢浩代, 岡田雅樹, 大塚雄一, 尾崎光紀, 佐藤夏雄, 篠原学, 田所裕康, 田口真, 田中良昌, 谷森達, 土屋史紀, 山岸久雄, 吉川顕正, 行松彰, 湯元清文
  • Organizer: 宇宙科学シンポジウム
  • Place of Presentation: 神奈川県相模原市、宇宙科学研究所
  • Year and Date: 2015-01-06 – 2015-01-07
• [Presentation] 北海道HFレーダーとニュージーランド地磁気観測データによるULF波動の同時観測 (2014)
  • Author(s): 尾花由紀, 西谷望, 堀智昭, 寺本万里子, 能勢正仁, 吉川顕正
  • Organizer: 平成26年度中緯度短波レーダー研究会
  • Place of Presentation: 愛知県名古屋市、名古屋大学
  • Year and Date: 2014-11-17
• [Presentation] An automated procedure of sounding of the plasmasphere by the CRUX magnetometer array in New Zealand (2014)
  • Author(s): Yuki Obana and Masahito Nosé
  • Organizer: 第136回 地球電磁気･地球惑星圏学会 総会・講演会
  • Place of Presentation: 長野県松本市、キッセイ文化ホール
  • Year and Date: 2014-10-31 – 2014-11-03
• [Presentation] Characteristics of quarter wave standing Alfven waves observed by the New Zealand magnetometer array (2014)
  • Author(s): Yuki Obana, Colin L. Waters, Murray D. Sciffer, Gareth Sciffer, Frederick W. Menk, Robert L. Lysak
  • Organizer: Chapman Conference on Low-Frequency Waves in Space Plasmas
  • Place of Presentation: Jeju Isl, Korea, Hyatt Regency Jeju Isl
  • Year and Date: 2014-08-31 – 2014-09-05
• [Presentation] A Study of Ionospheric Pc 4 Plasma Oscillation Observed by the Hokkaido HF Radar and its Comparison with Geomagnetic Pulsation on the Ground (2014)
  • Author(s): Yuki Obana, Nozomu Nishitani, Tomoaki Hori, Mariko Teramoto, Masahito Nose, Akimasa Yoshikawa
  • Organizer: Asia Oceania Geosciences Society 11th Annual Meeting
  • Place of Presentation: 北海道札幌市、ロイトン札幌ホテル
  • Year and Date: 2014-07-28 – 2014-08-01
• [Presentation] Mode Transfer from Quarter-Wave to Half-Wave Modes of Standing Alfven Waves Around the Dawn Terminator (2014)
  • Author(s): Y. Obana, C. L. Waters, M. D. Sciffer, G. Sciffer, F. W. Menk, and R. L. Lysak
  • Organizer: Asia Oceania Geosciences Society 11th Annual Meeting
  • Place of Presentation: 北海道札幌市、ロイトン札幌ホテル
  • Year and Date: 2014-07-28 – 2014-08-01
• [Presentation] 北海道HFレーダーと地上磁場におけるPc 4脈動の同時観測研究 (2014)
  • Author(s): Y. Obana, N. Nishitani, T. Hori, M. Teramoto, M. Nose, and A. Yoshikawa
  • Organizer: 日本地球惑星科学連合2014年大会
  • Place of Presentation: 神奈川県横浜市、パシフィコ横浜
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] Characteristics of Quarter-Wave ULF Pulsations around the dawn terminator (2013)
  • Author(s): Y. Obana, F. W. Menk, C. L. Waters, M. D. Sciffer, A. Yoshikawa, F. Honary, M. B. Moldwin, I. R. Mann, D. Boteler, V. Angelopoulos, and C. T. Russell
  • Organizer: Asia Oceania Geoscience Society (AOGS) 10th Annual Meeting
  • Place of Presentation: Brisbane, Australia
• [Presentation] Modelling ULF Quarter-wave modes (2013)
  • Author(s): G. D. Sciffer, C. L. Waters, M. D. Sciffer, Y. Obana
  • Organizer: the 13th Australian Space Science Conference (ASSC)
  • Place of Presentation: Sydney, Australia
• [Presentation] タスマニア-ニュージーランド地磁気観測網による磁力線共鳴振動の詳細観測 (2013)
  • Author(s): 尾花 由紀, 塩川和夫, 寺本万里子, 柿並義宏, 才田聡子, 吉川顕正, 田中良昌, Frederick W. Menk, Colin L. Waters, Craig J. Rodger
  • Organizer: 日本地球惑星科学連合2013年大会
  • Place of Presentation: 幕張, 千葉
• [Presentation] Characteristics in frequencies of Pi2 pulsations with the mid-latitude Northern American SuperDARN radar (2013)
  • Author(s): Teramoto, Mariko, John M. Ruohoniemi, Nathaniel A Frissel, Evan Thomas, Yuki Obana
  • Organizer: 地球電磁気・地球惑星圏学会 第134回総会及び講演会
  • Place of Presentation: 高知大学朝倉キャンパス, 高知
• [Presentation] 夜境界線の通過に伴うQuarter WaveからHalf Waveへの磁力線共鳴振動モード遷移 (2013)
  • Author(s): 尾花由紀, C. L. Waters, M. D. Sciffer, F. W. Menk, R. L. Lysak
  • Organizer: 地球電磁気・地球惑星圏学会 第134回総会及び講演会
  • Place of Presentation: 高知大学朝倉キャンパス, 高知
• [Presentation] A Study of Field Line Resonances using data from the Magnetometer Array in the Tas- mania and New Zealand Region (2013)
  • Author(s): 尾花 由紀, 塩川和夫, 寺本万里子, 柿並義宏, 才田聡子, 吉川顕正, 田中良昌, Frederick W. Menk, Colin L. Waters, Craig J. Rodger
  • Organizer: 日本地球惑星科学連合2013年大会
  • Place of Presentation: 幕張, 千葉
• [Presentation] Characteristics of Quarter-Wave ULF Pulsations around the dawn terminator (2013)
  • Author(s): Y. Obana, F. W. Menk, C. L. Waters, M. D. Sciffer, A. Yoshikawa, F. Honary, M. B. Moldwin, I. R. Mann, D. Boteler, V. Angelopoulos, and C. T. Russell
  • Organizer: Asia Oceania Geosciences Society 10th Annual Meeting
  • Place of Presentation: Brisbane, Australia
• [Presentation] A Study of ULF pulsations observed at a New Magnetometer Array in the Tasmania and New Zealand Region (2012)
  • Author(s): 尾花由紀, 塩川和夫, 柿並義宏, 才田聡子, 吉川顕正, 田中良昌, Frederick. W. Menk, Colin. L. Waters, Craig. J. Rodger
  • Organizer: 日本地球惑星科学連合2012年大会
  • Place of Presentation: 幕張, 千葉
• [Remarks] OECU CRUX data archive
  • URL: http://www1.osakac.ac.jp/crux/