Studies on Cowling channel usingglobal Magnetosphere-Ionosphere coupling simulator

• Project/Area Number: 22540460
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Space and upper atmospheric physics
• Research Institution: Kyushu University
• Principal Investigator: YOSHIKAWA Aimasa 九州大学, 国際宇宙天気科学・教育センター, 講師 (70284479)
• Co-Investigator(Kenkyū-buntansha): TERADA Naoki 東北大学, 大学院・理学研究科, 准教授 (70470060)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2010: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 磁気圏電離圏結合 / Cowlingチャンネル / Hall分極場 / Alfven波 / アルヴェーン波 / Cowlingチャン / オーロラ過程 / MHDシミュレータ

Research Abstract

We present the first complete formulation of the coupling between the ionospheric horizontal currents (including Hall currents) and the field-aligned currents (FAC) via shear Alfven wave, which can describe the formation of a Cowling channel without any a priori parameterization of the secondary (Hall-polarization) electric field strength. Our theory separates the Cowling channel into "primary" and "secondary" components. Until now there are no theoretical frameworks, which can derive these separated components from observed or given total conductance, electric field and FAC distributions alone. But when a given incident Alfven wave is considered as the driver, the reflected wave can be uniquely decomposed into the primary and secondary components. We show that the reflected wave can, depending on actual conditions, indeed carry FAC that connect to divergent Hall currents. With this new method wecan identify how large secondary electric field is generated to close the divergent Hall current withinthe ionosphere, and how much of the Hall current continues out to the magnetosphere as FAC. In typical ionospheric situations only a small fraction of FAC is connected to Hall currents at conductance gradients, i.e. the secondary field is relatively strong. But when conductances are relatively low compared with Alfven conductance and/or horizontal scales smaller than ~10 [km], the Hall FAC may become significant.

Research Products

• [Journal Article] General solution for calculating polarization electric fields in the auroral ionosphere and application examples (2013)
  • Author(s): Amm, O., R. Fujii, H. Vanhamäki, A. Yoshikawa, and A. Ieda
  • Journal Title: Geophys. Res. Space Physics Volume: 118 Issue: 5 Pages: 2428-2437
  • DOI: 10.1002/jgra.50254
  • Peer Reviewed
• [Journal Article] An application of the finite length Cowling channel model to auroral arcs with longitudinal variations (2012)
  • Author(s): Fujii, R., O. Amm, H. Vanhamäki, A. Yoshikawa, and A. Ieda
  • Journal Title: J. Geophys. Res. Volume: 117, A11217 Issue: A11
  • DOI: 10.1029/2012ja017953
  • Peer Reviewed
• [Journal Article] Poleward moving auroral arcs observed at the South Pole Station and the interpretation by field line resonances (2012)
  • Author(s): Tanaka, Y.-M
  • Journal Title: Journal of Geophysical Research Volume: 117 Issue: A9
  • DOI: 10.1029/2012ja017899
  • Peer Reviewed
• [Journal Article] Ionospheric Joule heating and Poynting flux in quasi-static approximation (2012)
  • Author(s): Vanhamäki, H., A. Yoshikawa, O. Amm, and R. Fujii
  • Journal Title: J. Geophys. Res. Volume: 117, A08327 Issue: A8
  • DOI: 10.1029/2012ja017841
  • Peer Reviewed
• [Journal Article] Centrifugally stimulated exospheric ion escape at Mercury (2012)
  • Author(s): Delcourt, D. C., K. Seki, N. Terada, and T. E. Moore
  • Journal Title: Geophysical Research Letters Volume: 39 Issue: 22
  • DOI: 10.1029/2012gl054085
  • Peer Reviewed
• [Journal Article] Storm-time electron density enhancement in the cleft ion fountain (2012)
  • Author(s): Kitamura, N., Y. Nishimura, M. O. Chandler, T. E. Moore, N. Terada, T. Ono, A. Shinbori, and A. Kumamoto
  • Journal Title: Journal of Geophysical Research Volume: 117 Issue: A11
  • DOI: 10.1029/2012ja017900
  • Peer Reviewed
• [Journal Article] A simulation study of the current-voltage relationship of the Io tail aurora (2012)
  • Author(s): Matsuda, K., N. Terada, Y. Katoh, and H. Misawa
  • Journal Title: 10.1029/2012JA017790 Volume: 117
  • Peer Reviewed
• [Journal Article] Statistical study of broad band whistler-mode waves detected by Kaguya near the Moon (2012)
  • Author(s): Tsugawa, Y.; Katoh, Y.; Terada, N.; Ono, T.; Tsunakawa, H.; Takahashi, F.; Shibuya, H.; Shimizu, H.; Matsushima, M.; Saito, Y.; Yokota, S.; Nishino, M. N.
  • Journal Title: GEOPHYSICAL RESEARCH LETTERS Volume: 39 Issue: 16
  • DOI: 10.1029/2012gl052818
  • Peer Reviewed
• [Journal Article] Photoelectron flows in the polar wind during geomagnetically quiet periods (2012)
  • Author(s): Kitamura, N., K. Seki, Y. Nishimura, N. Terada, T. Ono, T. Hori, and R. J. Strangeway
  • Journal Title: Journal of Geophysical Research Volume: 117 Issue: A7
  • DOI: 10.1029/2011ja017459
  • Peer Reviewed
• [Journal Article] Suzaku observations of charge exchange emission from solar system objects (2012)
  • Author(s): Ezoe, Y.; Fujimoto, R.; Yamasaki, N. Y.; Mitsuda, K.; Ohashi, T.; Ishikawa, K.; Oishi, S.; Miyoshi, Y.; Terada, N.; Futaana, Y.; Porter, F. S.; Brown, G. V.
  • Journal Title: Astronomische Nachrichten Volume: 333 Issue: 4 Pages: 319-319
  • DOI: 10.1002/asna.201211664
  • Peer Reviewed
• [Journal Article] 小型科学衛星1号機Sprint-A/EXCEED計画の概要 (2012)
  • Author(s): 吉川一朗, 土屋史紀, 寺田直樹
  • Journal Title: 日本惑星科学会誌 Volume: 21 Pages: 16-21
  • Peer Reviewed
• [Journal Article] A self-consistent synthesis description of J.Geophys.Res magnetosphere-ionosphere coupling and scale-dependent auroral process using shear Alfven wave (2011)
  • Author(s): Yoshikawa A., et al
  • Journal Title: J.Geophys.Res Volume: 116 Issue: A8 Pages: n/a-n/a
  • DOI: 10.1029/2011ja016460
  • Peer Reviewed
• [Journal Article] Self-consistent formulation for the evolution of ionospheric conductances at the onospheric E region within the M□I coupling scheme (2011)
  • Author(s): Yoshikawa A., et al
  • Journal Title: J.Geophys.Res Volume: 116 Issue: A9 Pages: n/a-n/a
  • DOI: 10.1029/2011ja016449
  • Peer Reviewed
• [Journal Article] Reformulation and energy flow of the Cowlingchannel (2011)
  • Author(s): Fujii, R., O. Amm, A. Yoshikawa, A. Ieda, and H. Vanhamaki
  • Journal Title: J. Geophys. Res. Volume: 116 Issue: A2 Pages: n/a-n/a
  • DOI: 10.1029/2010ja015989
  • Peer Reviewed
• [Journal Article] A statistical investigation of the Cowling channel efficiency in the auroral zone (2011)
  • Author(s): Amm, O., R. Fujii, K. Kauristie, A. Aikio, A. Yoshikawa, A. Ieda, and H. Vanhamaki
  • Journal Title: J. Geophys. Res. Volume: 116 Issue: A2 Pages: n/a-n/a
  • DOI: 10.1029/2010ja015988
  • Peer Reviewed
• [Journal Article] AKR modulation and Global Pi 2 oscillation: Jan. 24, 1997 event (2011)
  • Author(s): Uozumi, T., K. Yumoto, T. Tokunaga, S. I. Solovyev, B. M. Shevtsov, R. Marshall, K. Liou, S. Ohtani, S. Abe, A. Ikeda, K. Kitamura, A. Yoshikawa, H. Kawano, and M. Itonaga
  • Journal Title: J. Geophys. Res. Volume: VOL. 116 Issue: A6 Pages: n/a-n/a
  • DOI: 10.1029/2010ja016042
  • Peer Reviewed
• [Journal Article] 変化点検出を応用した時系列データからの突発現象の前兆検出アルゴリズム (2011)
  • Author(s): 徳永旭将, 池田大輔, 中村和幸, 樋口知之, 吉川顕正, 魚住禎司, 藤本晶子,森岡昭, 湯元清文, CPMNGroup
  • Journal Title: 情報処理学会論文誌「数理モデル化と応用TOM」 Volume: Vol 4. No. 3 Pages: 14-34
  • NAID: 110007990868
  • Peer Reviewed
• [Journal Article] Pi 2 waves simultaneously observed by Cluster and CPMN ground-based magnetometers near the plasmapause (2011)
  • Author(s): H. Kawano, S. Ohtani, T.Uozumi, T. Tokunaga, A. Yoshikawa, K. Yumoto, E. A. Lucek, M. Andre andtheCPMNgroup
  • Journal Title: Ann. Geophys Volume: 29 Pages: 1663-1672
  • Peer Reviewed
• [Journal Article] An empirical model of the quiet daily geomagnetic field variation derived from CPMN 210 MM data from 1996 to 2007 (2011)
  • Author(s): Yamazaki Y., K. Yumoto, M. Cardinal, B. Fraser, P. Hattori, Y Kakinami, J.Y. Liu, K. Lynn, R. Marshall, D. McNamara, T. Nagatsuma, V. M. Nikiforov, R. Otadoy, M. Ruhimat, B. Shevtsov, K. Shiokawa, T. Uozumi, and A. Yoshikawa
  • Journal Title: J. Geophys. Res Volume: 2010
  • Peer Reviewed
• [Journal Article] An empirical model of the quiet daily geomagnetic field variation (2011)
  • Author(s): Yamazaki, et al
  • Journal Title: Journal of Geophysical Research Volume: 116 Issue: A10 Pages: n/a-n/a
  • DOI: 10.1029/2011ja016487
  • Peer Reviewed
• [Journal Article] Pi 2 waves simultaneously observed by Cluster and CPMN ground-based magnetometers near the plasmapause (2011)
  • Author(s): Kawano, H., et al
  • Journal Title: Ann.Geophys. Volume: 29 Issue: 9 Pages: 1663-1672
  • DOI: 10.5194/angeo-29-1663-2011
  • Peer Reviewed
• [Journal Article] CPMN Group,変化点検出を応用した時系列データからの突発現象の前兆検出アルゴリズム (2011)
  • Author(s): 徳永旭将, 池田大輔, 中村和幸, 樋口知之, 吉川顕正, 魚住禎司, 藤本晶子, 森岡昭, 湯元清文
  • Journal Title: 情報処理学会論文誌「数理モデル化と応用TOM」 Volume: Vol 4.No.3 Pages: 14-34
  • Peer Reviewed
• [Journal Article] Reformulation and energy flow of the Cowling channel (2011)
  • Author(s): Fujii, R., O.Amm, A.Yoshikawa, A.Ieda, H.Vanjamakki
  • Journal Title: Journal of Geophysical Research Volume: 116(web)
  • Peer Reviewed
• [Journal Article] A statistical investigation of the Cowling channel efficiency in the auroral zone (2011)
  • Author(s): Amm O., R.Fujii, K.Kauristie, A.Aikio, A.Yoshikawa, A.Ieda, H.Vanhamaki
  • Journal Title: Journal of Geophysical Research Volume: 116(web)
  • Peer Reviewed
• [Journal Article] AKR modulation and Global Pi 2 oscillation : Jan.24, 1997 event7 (2011)
  • Author(s): Uozumi, T., K.Yumoto, T.Tokunaga, S.I.Solovyev, B.Shevtsov, R.Marshall, K.Liou, S.Ohtani, S.Abe, A.Ikeda, K.Kitamura, A.Yoshikawa, H.Kawano, M.Itonaga
  • Journal Title: Journal of Geophysical Research Volume: (印刷中)
  • Peer Reviewed
• [Journal Article] 変化点検出を応用した時系列データからの突発現象の前兆検出アルゴリズム (2011)
  • Author(s): 徳永旭将, 池田大輔, 中村和幸, 樋口知之, 吉川顕正, 魚住禎司, 藤本晶子, 森岡昭, 湯元清文, CPMN Group
  • Journal Title: 情報処理学会論文誌「数理モデル化と応用TOM」 Volume: (印刷中)
  • NAID: 110007990868
  • Peer Reviewed
• [Journal Article] Onset TimeDetermination of Precursory Events of Singular Spectrum Transformation (2010)
  • Author(s): Tokunaga T., Daisuke Ikeda, Kazuyuki Nakamura, Tomoyuki Higuchi, Akimasa Yoshikawa, Teiji Uozumi, Akiko Fujimoto, Akira Morioka, Kiyohumi Yumoto and CPMN group
  • Journal Title: International Journal of Circuits, Systems and Signal processing Volume: vol.5 Pages: 46-60
  • Peer Reviewed
• [Journal Article] Ionospheric observation using FM-CW radar array, Advances in Geosciences, Vol.21: Solar & Terrestrial Science (2010)
  • Author(s): Ikeda A., A. Yoshikawa, M. G. Cardinal, K. Yumoto, M. Shinohara, K.Nozaki, B. M. Shevtsov, V. V. Bychkov, Q. M. Sugon, and D. McNamara
  • Journal Title: Ed. Marc Duldig Pages: 379-391
  • Peer Reviewed
• [Journal Article] Substorm convection and current system deduced from the global simulation (2010)
  • Author(s): Tanaka T., A. Nakamizo, A. Yoshikawa, S. Fujita, H. Shinagawa, H. Shimazu, T. Kikuchi, K. Hashimoto
  • Journal Title: J. Geophys. Res Volume: 115 Issue: A5
  • DOI: 10.1029/2009ja014676
  • Peer Reviewed
• [Journal Article] Phase relation between Pi 2-associated ionospheric Doppler velocity and magnetic pulsation observed at midlatitude MAGDAS station (2010)
  • Author(s): Ikeda A., Yumoto K., Uozumi T., Shinohara M., Nozaki K., Yoshikawa A., Bychkov V. V. , and Shevtsov B. M
  • Journal Title: J. Geophys. Res. Volume: 115, A02215 Issue: A2 Pages: 1-7
  • DOI: 10.1029/2009ja014397
  • Peer Reviewed
• [Journal Article] Alfvenic-coupling algorithm for global and dynamical magnetosphere-ionosphere coupled system (2010)
  • Author(s): Yoshikawa A., H. Nakata, A.Nakamizo, T. Uozumi, M. Itonaga, S. Fujita, K. Yumoto, and T. Tanaka
  • Journal Title: J. Geophys. Res Volume: 115 Issue: A4
  • DOI: 10.1029/2009ja014924
  • Peer Reviewed
• [Journal Article] Detecting Precursory Events in Time Series Data by an Extension of Singular Spectrum Transformation (2010)
  • Author(s): Tokunaga T., Daisuke Ikeda, Kazuyuki Nakamura, Tomoyuki Higuchi, Akimasa Yoshikawa, Teiji Uozumi, Akiko Fujimoto, Akira Morioka, Kiyohumi Yumoto and CPMN group
  • Journal Title: Proceedings of the 10th WSEAS International Conference on Applied Computer Science Pages: 366-374
  • Peer Reviewed
• [Journal Article] Magnetic field investigation of Mercury's magnetosphere and the inner heliosphere by MMO/MGF (2010)
  • Author(s): Baumjohann, W., A. Matsuoka, W. Magnes, K. Glassmeier, R. Nakamura, H.Biernat, M. Delva, K. Schwingenschuh, T. Zhang, H. Auster, K. Fornacon, I. Richter, A. Balogh, P. Cargill, C. Carr, M. Dougherty, T.S. Horbury, E.A. Lucek, F. Tohyama, T. Takahashi, M.
  • Journal Title: Planetary and Space Science Volume: Vol. 58, Issues 1-2 Issue: 1-2 Pages: 279-286
  • DOI: 10.1016/j.pss.2008.05.019
  • Peer Reviewed
• [Journal Article] Alfvenic-coupling algorithm for global and dynamical magnetosphere-ionosphere coupled system (2010)
  • Author(s): Yoshikawa A., H.Nakata, A.Nakamizo, T.Uozumi, M.Itonaga, S.Fujita, K.Yumoto, T.Tanaka
  • Journal Title: Journal of Geophysical Research Volume: 115(web)
  • Peer Reviewed
• [Journal Article] Substorm convection and current system deduced from the global simulation (2010)
  • Author(s): Tanaka T., A.Nakamizo, A.Yoshikawa, S.Fujita, H.Shinagawa, H.Shimazu, T.Kikuchi, K.Hashimoto
  • Journal Title: Journal of Geophysical Research Volume: 115(web)
  • Peer Reviewed
• [Journal Article] Ionospheric observation using FM-CW radar array (2010)
  • Author(s): Ikeda A., A.Yoshikawa, M.G.Cardinal, K.Yumoto, M.Shinohara, K.Nozaki, B.M.Shevtsov, V.V.Bychkov, Q.M.Sugon, D.McNamara
  • Journal Title: Advances in Geosciences Volume: 21 Pages: 379-391
  • Peer Reviewed
• [Journal Article] Phase Relation between Pi 2-associated Ionospheric Doppler Velocity and Magnetic Pulsation at Mid-Latitude MAGDAS Station (2010)
  • Author(s): Ikeda A., K.Yumoto, M.Shinohara, K.Nozaki, A.Yoshikawa, A.Shinbori
  • Journal Title: Journal of Geophysical Research Volume: 115(web)
  • Peer Reviewed
• [Journal Article] Onset Time Determination of Precursory Events in Time Series Data by an Extension of Singular Spectrum Transformation (2010)
  • Author(s): Tokunaga T., D.Ikeda, K.Nakamura, T.Higuchi, A.Yoshikawa, T.Uozumi, A.Fujimotok, A.Morioka, K.Yumoto
  • Journal Title: INTERNATIONAL JOURNAL of CIRCUITS, SYSTEMS and SIGNAL PROCESSING Volume: 5 Pages: 46-60
  • Peer Reviewed
• [Journal Article] Detecting Precursory Events in Time Series Data by an Extension of Singular Spectrum Transformation (2010)
  • Author(s): Tokunaga T., Daisuke Ikeda, Kazuyuki Nakamura, Tomoyuki Higuchi, Akimasa Yoshikawa, Teiji Uozumi, Akiko Fujimoto, Akira Morioka, Kiyohumi Yumoto, CPMN group
  • Journal Title: Proceedings of the 10th WSEAS International Conference on Applied Computer Science Pages: 366-374
  • Peer Reviewed
• [Presentation] 強磁場弱電離気体系に於ける電流クロージャー:Hall電流時空間非一様性がもたらすもの (2013)
  • Author(s): 吉川顕正
  • Organizer: 日本物理学会第68回年次大会「プラズマ宇宙物理3学会合同セッション
  • Place of Presentation: 広島大学
  • Year and Date: 2013-03-27
• [Presentation] M-I couping theory (2013)
  • Author(s): Yoshikwa A
  • Organizer: ECLAT Project Meeting, 2nd Project Review Graz
  • Place of Presentation: Austrian Academy of Sciences, Institute for Space Research, Graz, Austria
• [Presentation] Current Closure from Polar to Equatorial Ionosphere via Cowling Channel, EGU General AssemblyCurrent Closure from Polar to Equatorial Ionosphere via Cowling Channel (2013)
  • Author(s): Yoshikawa A
  • Organizer: EGU General Assembly 2013
  • Place of Presentation: Wien, Austria
• [Presentation] State-of-art in 3D Ionosphere and internal ionospheric dynamics (2013)
  • Author(s): Yoshikawa A
  • Organizer: effect on M-I coupling, ISSI Forum "Near Earth Electro-magnetic Environment (Swarm and Cluster)
  • Place of Presentation: スイス国際宇宙科学研究所, ベルン, スイス
• [Presentation] Analogy of Magnetosphere -Ionosphere coupling and Corona-chromospherephotosphere coupling (2013)
  • Author(s): Yoshikawa A
  • Organizer: ISSI Workshop on "Standing MHD Waves"
  • Place of Presentation: スイス国際宇宙科学研究所, ベルン, スイス
• [Presentation] Cowling チャンネルの物理 (2013)
  • Author(s): 吉川顕正
  • Organizer: 国立極地研究所研究集会:極域電磁圏構造の非線形発展
  • Place of Presentation: 国立極地研究所
• [Presentation] Technical presentation on the "International Center for Space Wather Science and Education" (2013)
  • Author(s): Yoshikawa A
  • Organizer: Kyushu University, 第50回国連宇宙平和利用委員会
  • Place of Presentation: 国連ウィーン本部, ウィーン, オーストリア.
• [Presentation] Current Closure from Polar to Equatorial Ionosphere via Cowling Channel (2013)
  • Author(s): Yoshikwa A
  • Organizer: EGU General Assembly 2013, 07-12, 2013
  • Place of Presentation: Wien, Austria
• [Presentation] State-of-art in 3D Ionosphere and internal ionospheric dynamics, effect on M-I coupling, (2013)
  • Author(s): Yoshikwa A
  • Organizer: ISSI Forum "Near Earth Electro-magnetic Environment (Swarm and Cluster)
  • Place of Presentation: スイス国際宇宙科学研究所、ベルン、スイス
  • Invited
• [Presentation] 強磁場弱電離気体系に於ける電流クロージャー：Hall電流時空間非一様性がもたらすもの (2013)
  • Author(s): 吉川顕正
  • Organizer: 日本物理学会第68回年次大会「プラズマ宇宙物理3学会合同セッション」
  • Place of Presentation: 広島大学, 広島県 東広島市
  • Invited
• [Presentation] Analogy of Magnetosphere-Ionosphere coupling and Corona-chromosphere-photosphere coupling (2013)
  • Author(s): Yoshikwa A
  • Organizer: ISSI Workshop on "Standing MHD Waves",
  • Place of Presentation: スイス国際宇宙科学研究所、ベルン、スイス
  • Invited
• [Presentation] Cowling チャンネルの物理 (2013)
  • Author(s): 吉川顕正
  • Organizer: 「国立極地研究所研究集会：極域電磁圏構造の非線形発展」
  • Place of Presentation: 国立極地研究所、東京都、立川市
  • Invited
• [Presentation] Technical presentation on the “International Center for Space Wather Science and Education”, Kyushu University (2013)
  • Author(s): Yoshikwa A
  • Organizer: 第50回国連宇宙平和利用委員会
  • Place of Presentation: 国連ウィーン本部, ウィーン, オーストリア
  • Invited
• [Presentation] MI結合の理論的側面から見たEISCAT_3Dへの期待 (2012)
  • Author(s): 吉川顕正
  • Organizer: EISCAT研究集会:北極・北欧における観測・研究戦略
  • Place of Presentation: 名古屋大学,坂田ホール
  • Year and Date: 2012-11-06
• [Presentation] 理論的観点から見た電離圏・磁気圏結合研究 (2012)
  • Author(s): Yoshikawa A
  • Organizer: 太陽彩層と地球電離圏の接点」研究会
  • Place of Presentation: 国立天文台・東京都三鷹市.
  • Year and Date: 2012-01-10
• [Presentation] 理論的観点から見た電離圏・磁気園結合研究 (2012)
  • Author(s): Yoshikawa A
  • Organizer: 国立天文台研究集会「太陽彩層と地球電離圏の接点」研究会
  • Place of Presentation: 国立天文台・東京都三鷹市(招待講演)
  • Year and Date: 2012-01-10
• [Presentation] Formation of Cowling channel from Polar to Equatorial Ionosphere (2012)
  • Author(s): Yoshikawa A
  • Organizer: the 2012 AGU Fall Meeting
  • Place of Presentation: Moscone Convention Center, San Francisco, California
• [Presentation] Extraction of polarization field and magnetospheric impedance from the M-I coupled system via shear Alfven wave (2012)
  • Author(s): Yoshikawa A.
  • Organizer: 第132回地球電磁気・地球惑星圏学会総会・講演会
  • Place of Presentation: 札幌コンベンションセンター.
• [Presentation] Formation of FAC -Cowling channel connecting from polar to equatorial ionosphere (2012)
  • Author(s): Yoshikawa A., S. Ohtani, A. Nakamizo, T. Uozumi, Y. Tanaka
  • Organizer: Formation of FAC -Cowling channel connecting from polar to equatorial ionosphere・講演会
  • Place of Presentation: 札幌コンベンションセンター
• [Presentation] 将来構想の施策まとめに関するパ ネルデ ィスカッション1 (2012)
  • Author(s): 吉川 顕正
  • Organizer: 第132回 地球電磁気・地球惑星圏学会総会・講演会
  • Place of Presentation: 札幌コンベンションセンター
• [Presentation] Establishment of International Center fot Space Science and education (2012)
  • Author(s): Yoshikawa A
  • Organizer: United Nations/Ecuador Workshop on the International Space Weather Initiative (20th Workshop of the United Nations Basic Space Science Initiative)
  • Place of Presentation: Quito, Ecuador
• [Presentation] Modeling of 3D Sq current system, JSPS Core-to-Core Program (2012)
  • Author(s): Yoshikawa A
  • Organizer: 2012 ISWI and MAGDAS School on Space Science
  • Place of Presentation: Bangdong, Indonesia
• [Presentation] International Space Wather Science and Education (2012)
  • Author(s): Yoshikawa A
  • Organizer: UN/Austria Symposium on Space Weather Data Analysis
  • Place of Presentation: AustrianAcademy of Sciences, Institute for Space Research, Graz, Austria.
• [Presentation] Sq電流系に於ける3次元カウリングチャンネルモデル (2012)
  • Author(s): 吉川 顕正, 魚住 禎司, 湯元 清文
  • Organizer: 2012年度日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ,千葉県幕張市
• [Presentation] 極域から磁気赤道域にかけて形成されるCowlingチャンネル (2012)
  • Author(s): 吉川 顕正, 大谷 晋一, 中溝 葵, 魚住 禎司, 湯元 清文
  • Organizer: 2012年度日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ,千葉県幕張市
• [Presentation] 電離圏に於け入反射Alfven 波の分離 (2012)
  • Author(s): 吉川 顕正, 細川 敬祐, 小川 泰信, 家田 章正, 藤井 良一, 湯元 清文
  • Organizer: 2012年度日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ,千葉県幕張市
• [Presentation] 磁気圏電離圏チュートリアル (2012)
  • Author(s): Yoshikawa A.
  • Organizer: 第26回大気圏シンポジウム
  • Place of Presentation: JAXA宇宙科学研究所
• [Presentation] Cowlingチャンネルの物理 (2012)
  • Author(s): 吉川顕正
  • Organizer: 2011年度 「極域電離圏-磁気圏結合」研究集会
  • Place of Presentation: 国立極地研究所
• [Presentation] Formation of Cowling channel from Polar to Equatorial Ionosphere (2012)
  • Author(s): Yoshikwa A
  • Organizer: the 2012 AGU Fall Meeting
  • Place of Presentation: Moscone Convention Center, San Francisco, California, USA
• [Presentation] 太陽地球系科学の現状と科学課題 4:地球惑星圏における人類活動を支える知識基盤の構築 (2012)
  • Author(s): 吉川 顕正, SGEPSS 将来構想検討ワーキンググループ
  • Organizer: 第132回 地球電磁気･地球惑星圏学会総会・講演会
  • Place of Presentation: 札幌コンベンションセンター
• [Presentation] Formation of FAC -Cowling channel connecting from polar to equatorial ionosphere (2012)
  • Author(s): Yoshikawa A., S. Ohtani, A. Nakamizo, T. Uozumi, Y. Tanaka
  • Organizer: 第132回 地球電磁気･地球惑星圏学会総会・講演会
  • Place of Presentation: 札幌コンベンションセンター
• [Presentation] Extraction of polarization field and magnetospheric impedance from the M-I coupled system via shear Alfven wave (2012)
  • Author(s): Yoshikawa A.
  • Organizer: 第132回 地球電磁気･地球惑星圏学会総会・講演会
  • Place of Presentation: 札幌コンベンションセンター
• [Presentation] Modeling of 3D Sq current system (2012)
  • Author(s): Yoshikwa A
  • Organizer: JSPS Core-to-Core Program, 2012 ISWI and MAGDAS School on Space Science
  • Place of Presentation: Bangdong, Indonesia
  • Invited
• [Presentation] International Space Wather Science and Education (2012)
  • Author(s): Yoshikwa A
  • Organizer: UN/Austria Symposium on Space Weather Data Analysis, 18-21, September, 2012, Austrian Academy of Sciences
  • Place of Presentation: Austrian Academy of Sciences, Institute for Space Research, Graz, Austria
  • Invited
• [Presentation] Sq電流系に於ける3次元カウリングチャンネルモデル (2012)
  • Author(s): 吉川 顕正, 魚住 禎司, 湯元 清文
  • Organizer: 2012年度日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ，千葉県幕張市
• [Presentation] 極域から磁気赤道域にかけて形成されるCowlingチャンネル (2012)
  • Author(s): 吉川 顕正, 大谷 晋一, 中溝 葵, 魚住 禎司, 湯元 清文
  • Organizer: 2012年度日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ，千葉県幕張市
• [Presentation] 電離圏に於け入反射Alfven 波の分離 (2012)
  • Author(s): 吉川 顕正, 細川 敬祐, 小川 泰信, 家田 章正, 藤井 良一, 湯元 清文
  • Organizer: 2012年度日本地球惑星科学連合大会
  • Place of Presentation: 幕張メッセ，千葉県幕張市
• [Presentation] 磁気圏電離圏チュートリアル (2012)
  • Author(s): Yoshikawa A
  • Organizer: 第26回大気圏シンポジウム
  • Place of Presentation: JAXA宇宙科学研究所・神奈川県相模原市(招待講演)
• [Presentation] Cowling チャンネル形成の理論 (2011)
  • Author(s): Yoshikawa A
  • Organizer: 国立極地研究所研究集会:極域電磁圏構造の非線形発展(観測と理論的アプローチの協働を目指して)」
  • Place of Presentation: 国立極地研究所
• [Presentation] Illustration of Cowling channel coupling to the shear Alfven wave (2011)
  • Author(s): 吉川顕正
  • Organizer: 第35回極域宙空圏シンポジウム
  • Place of Presentation: 国立極地研究所
• [Presentation] New method for describing the Cowling channel coupling to the FAC system via shear Alfven wave: Conjugate Hall current analysis (2011)
  • Author(s): 吉川顕正
  • Organizer: 地球電磁気・地球惑星圏学会, 第130回総会・講演会
  • Place of Presentation: 神戸大学六甲第2キャンパス
• [Presentation] A new method for describing the Cowling channel coupling to the FAC system via shear Alfven wave: Conjugate Hall current analysis (2011)
  • Author(s): Yoshikawa A.
  • Organizer: Workshop on Physical Processes in Non-Uniform Finite Magnetospheric Systems-50 Years of Tamao's Resonant Mode Coupling Theory -
  • Place of Presentation: Nishijin plaza, Fukuoka, Japan
• [Presentation] A new method for describing the Cowling channel coupling to the FAC system via shear Alfven wave: Conjugate Hall current analysis (2011)
  • Author(s): 吉川顕正
  • Organizer: NICT/STEL共催2011年度中間圏・熱圏・電離圏(MTI)研究集会
  • Place of Presentation: 九州大学箱崎キャンパス
• [Presentation] Principle of Geomagnetism, ISWI/MAGDAS school on Litho-Space Weather (2011)
  • Author(s): Yoshikawa A
  • Organizer: RedeemersUniversity
  • Place of Presentation: Lagos, Nigeria
• [Presentation] Geomagnetic Disturbances, ISWI/MAGDAS school on Litho-Space Weather (2011)
  • Author(s): Yoshikawa A
  • Organizer: RedeemersUniversity
  • Place of Presentation: Lagos, Nigeria
• [Presentation] Cowlingチャンネル形成の理論 (2011)
  • Author(s): Yoshikawa A
  • Organizer: 国立極地研究所研究集会:極域電磁圏構造の非線形発展(観測と理論的アプローチの協働を目指して
  • Place of Presentation: 国立極地研究所・東京都立川市(招待講演)
• [Presentation] A new method for describing the Cowling channel coupling to the FAC system via shear Alfven wave : Conjugate Hall current analysis (2011)
  • Author(s): Yoshikawa A
  • Organizer: AGU Fall meeting
  • Place of Presentation: 米国・サンフランシスコ
• [Presentation] 1/4波長モード磁力線共鳴振動の空間分布と共鳴特性について (2011)
  • Author(s): 尾花由紀, Menk Frederick W., Waters Colin L., Sciffer Murray D., 吉川顕正, 吉川一朗, Moldwin Mark, Mann Ian R., Boteler David, Angelopoulos Vassilis, Russell C.T.
  • Organizer: 地球電磁気・地球惑星圏学会,第130回総会・講演会
  • Place of Presentation: 神戸大学六甲第2キャンパス
• [Presentation] Timing relation between positive bay onsets, Pi 2onsets, auroral initial brightenings and auroral breakups (2011)
  • Author(s): 徳永旭将, 中村和幸, 樋口知之, 魚住禎司, 吉川顕正, 森岡昭, 湯元清文, MAGDAS/CPMNグループ, 湯元清文
  • Organizer: 地球電磁気・地球惑星圏学会,第130回総会・講演会
  • Place of Presentation: 神戸大学六甲第2キャンパス
• [Presentation] New method for describing the Cowling channel coupling to the FAC system via shear Alfven wave : Conjugate Hall current analysis (2011)
  • Author(s): 吉川顕正
  • Organizer: 地球電磁気・地球惑星圏学会,第130回総会・講演会
  • Place of Presentation: 神戸大学六甲第2キャンパス
• [Presentation] 地上-静止軌道で同時観測されたサブストーム・カレントウェッジの上向き/下向き沿磁力線電流に伴うPi2地磁気脈動 (2011)
  • Author(s): 魚住禎司, 湯元清文, 今城峻, 古賀清一, 小原隆博, Baishev Dmitry, Shevtsov Boris M., Milling David, Mann Ian R., 池田昭大, 阿部修司, 吉川顕正, 河野英昭
  • Organizer: 地球電磁気・地球惑星圏学会,第130回総会・講演会
  • Place of Presentation: 神戸大学六甲第2キャンパス
• [Presentation] Illustration of Cowling channel coupling to the shear Alfven wave (2011)
  • Author(s): 吉川顕正
  • Organizer: 第35回極域宙空圏シンポジウム
  • Place of Presentation: 国立極地研究所・東京都立川市
• [Presentation] A new method for describing the Cowling channel coupling to the FAC system via shear Alfven wave : Conjugate Hall current analysis (2011)
  • Author(s): Yoshikawa A
  • Organizer: Workshop on Physical Processes in Non-Uniform Finite Magnetospheric Systems-50 Years of Tamao's Resonant Mode Coupling Theory
  • Place of Presentation: 九州大学西新プラザ・福岡市(招待講演)
• [Presentation] Field line resonance detected by magnetic and optical measurements (2011)
  • Author(s): Y.Tanaka, A.Yoshikawa, Y.Ebihara, S.Saita
  • Organizer: Workshop on Physical Processes in Non-Uniform Finite Magnetospheric Systems-50 Years of Tamao's Resonant Mode Coupling Theory
  • Place of Presentation: 九州大学西新プラザ・福岡市
• [Presentation] The Resonance Structure of Quarter-Wave ULF Pulsations (2011)
  • Author(s): Y.Obana, F.W.Menk, C.L.Waters, M.D.Sciffer, A.Yoshikawa, I.Yoshikawa, M.Moldwin, I.R.Mann, D.Botele, V.Angelopoulos, C.T.Russell
  • Organizer: Workshop on Physical Processes in Non-Uniform Finite Magnetospheric Systems-50 Years of Tamao's Resonant Mode Coupling Theory
  • Place of Presentation: 九州大学西新プラザ・福岡市(招待講演)
• [Presentation] A new method for describing the Cowling channel coupling to the FAC system via shear Alfven wave : Conjugate Hall current analysis (2011)
  • Author(s): Yoshikawa A
  • Organizer: NICT/STEL共催2011年度中間圏・熱圏・電離圏(MTI)研究集会
  • Place of Presentation: 九州大学箱崎キャンパス・福岡市(招待講演)
• [Presentation] A self-consistent formulation for the evolution of ionospheric conductances at the ionospheric E-region within an M-I coupling scheme (2011)
  • Author(s): Yoshikawa A
  • Organizer: AGU Chapman conference on Relationship Between Auroral Phenomonology and Magnetospheric πrocesses
  • Place of Presentation: Fairbanks, USA
• [Presentation] 電流キャリア遷移過程を考慮した電気伝導度発展方程式の考察 (2010)
  • Author(s): 吉川顕正
  • Organizer: 第34回極域宙空圏シンポジウム
  • Year and Date: 2010-12-02
• [Presentation] Hall Conjugate Analysis for extraction of Cowling Channel (2010)
  • Author(s): Yoshikawa A
  • Organizer: FMI-Invitation seminar
  • Place of Presentation: Helsinki, Finland(Invited talk)
  • Year and Date: 2010-09-03
• [Presentation] Generalized Cowling Channel in the global ionosphere (2010)
  • Author(s): Yoshikawa A
  • Organizer: FMI-Invitation seminar
  • Place of Presentation: Helsinki, Finland(Invited talk)
  • Year and Date: 2010-08-20
• [Presentation] Cowling チャンネル研究からみた二次元電離圏ポテンシャルソルバーの留意点 (2010)
  • Author(s): 吉川顕正
  • Organizer: GEMSIS-太陽、磁気圏、電離圏ワークショップ2010:ジオスペースにおける多圏間相互作用と高エネルギー粒子生成・消滅機構
  • Place of Presentation: 名鉄犬山観光ホテル
• [Presentation] Cowling チャンネル研究の展開 (2010)
  • Author(s): 吉川顕正
  • Organizer: 名古屋大学太陽地球環境研究所研究集会,「欧州非干渉性レーダー 研究集会」
  • Place of Presentation: 情報通信研究機構 小金井本部国際会議室
• [Presentation] 磁気圏電離圏結合系に於ける電流キャリア遷移過程を考慮した電気伝導度モデリングとその帰結,地球電磁気 (2010)
  • Author(s): 吉川 顕正, 中溝 葵, 魚住 禎司,田中 良昌, 大谷 晋一
  • Organizer: 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
• [Presentation] Hall Conjugate Analysis for extraction of Cowling Channel (2010)
  • Author(s): Yoshikawa A
  • Organizer: FMI-Invitation seminar, 3 Sept., FMI
  • Place of Presentation: Helsinki, Finland
• [Presentation] Generalized Cowling Channel in the global ionosphere (2010)
  • Author(s): Yoshikawa A
  • Organizer: FMI-Invitation seminar, 20 Aug., FMI
  • Place of Presentation: Helsinki, Finland
• [Presentation] On the Harang- discontinuity typeionospheric potential field deformation derived from the multi- functional ionospheric potential solver (2010)
  • Author(s): Yoshikawa A., and S Ohtani
  • Organizer: Western Pacific Geophysics Meeting
  • Place of Presentation: Taipei, Taiwan
• [Presentation] Formation of Cowling Channel through the Inductive MI-Coupling Process (2010)
  • Author(s): Yoshikawa A., O Amm, H Vanhamaki, and R Fujii
  • Organizer: Western Pacific Geophysics Meeting
  • Place of Presentation: Taipei, Taiwan.
• [Presentation] 多機能型電離圏ポテンシャルソルバーによって導出された電離圏対流変形の要因分離:ハラング連続性の考察 (2010)
  • Author(s): 吉川 顕正
  • Organizer: 日本地球惑星連合2010年大会
  • Place of Presentation: 千葉県幕張メッセ
• [Presentation] Alfven波をつうじたMI結合系でのCowling-channelの形成 (2010)
  • Author(s): 吉川 顕正
  • Organizer: 日本地球惑星連合2010年大会
  • Place of Presentation: 千葉県幕張メッセ
• [Presentation] Formation of Cowling Channel through the MI-Coupling Process via Shear Alfven Wave (2010)
  • Author(s): Yoshikawa A., O Amm and R Fujii
  • Organizer: EGU meeting
  • Place of Presentation: Vienne, Austria
• [Presentation] Formation of Cowling Channel through the MI-Coupling Process via Shear Alfven Wave (2010)
  • Author(s): Yoshikawa A., O Amm, R Fujii
  • Organizer: EGU-meeting
  • Place of Presentation: Vienne, Austria(Invited talk)
• [Presentation] On the Harang-discontinuity type ionospheric potential field deformation derived from the multi- functional ionospheric potential solver (2010)
  • Author(s): Yoshikawa A., S Ohtani
  • Organizer: 2010 Western Pacific Geophysics Meeting
  • Place of Presentation: Taipei, Taiwan(Invited talk)
• [Presentation] Formation of Cowling Channel through the Inductive MI-Coupling Process (2010)
  • Author(s): Yoshikawa A., O Amm, H Vanhamoki, R Fujii
  • Organizer: 2010 Western Pacific Geophysics Meeting
  • Place of Presentation: Taipei, Taiwan(Invited talk)
• [Presentation] 磁気圏電離圏結合系に於ける電流キャリア遷移過程を考慮した電気伝導度モデリングとその帰結 (2010)
  • Author(s): 吉川顕正, 中溝葵, 魚住禎司, 田中良昌, 大谷晋一
  • 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
• [Presentation] Cowlingチャンネル生成に伴う伝導度分配機構 (2010)
  • Author(s): 吉川顕正
  • Organizer: 平成22年度国立極地研究所研究集会「極域における電離圏パラメータの非線形発展;モデル化と検証」
  • Place of Presentation: 国立極地研究所
• [Presentation] Cowlingチャンネル研究の展開 (2010)
  • Author(s): 吉川顕正
  • Organizer: 平成22年度名古屋大学太陽地球環境研究所研究集「EISCAT研究集会」
  • Place of Presentation: 情報通信研究機構(招待講演)
• [Presentation] Cowling研究からみた二次元ポテンシャルソルバーの留意点 (2010)
  • Author(s): 吉川顕正
  • Organizer: Cowling研究からみた二次元ポテンシャルソルバーの留意点,平成22年度名古屋大学太陽地球環境研究所研究集会「GEMSIS-太陽、磁気圏、電離圏ワークショップ2010
  • Place of Presentation: 名鉄犬山ホテル(招待講演)
• [Presentation] 低高度MHD擾乱からのCowling-channel抽出手法の開発 (2009)
  • Author(s): 吉川顕正
  • Organizer: The 33rd Symposium on Space and Upper Atmospheric Sciences in the Polar Regions
  • Place of Presentation: 国立極地研究所
• [Presentation] MI結合の理論的側面から見たEISCAT_3Dへの期待
  • Author(s): 吉川顕正
  • Organizer: EISCAT研究集会：北極・北欧における観測・研究戦略
  • Place of Presentation: 名古屋大学,坂田ホール
  • Invited