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STUDY OF PECULIAR SOLAR WIND STRUCTURE AT CYCLE 24 SOLAR MINIMUM

Research Project

Project/Area Number 21340140
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Space and upper atmospheric physics
Research InstitutionNagoya University

Principal Investigator

TOKUMARU Munetoshi  名古屋大学, 太陽地球環境研究所, 教授 (60273207)

Co-Investigator(Renkei-kenkyūsha) FUJIKI Ken'ichi  名古屋大学, 太陽地球環境研究所, 助教 (20303597)
Project Period (FY) 2009 – 2012
Project Status Completed (Fiscal Year 2012)
Budget Amount *help
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2012: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2011: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2010: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2009: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Keywords太陽風 / 惑星間空間 / 特異な太陽活動 / 太陽風のグローバル分布 / 太陽圏の変動 / 惑星間空間シンチレーション / 太陽ダイナモ活動 / 宇宙天気 / 太陽活動 / 太陽圏
Research Abstract

We improved the interplanetary scintillation measurement system of the Solar-Terrestrial Environment Laboratory of Nagoya University, and investigated long-term evolution of the peculiar solar wind structure observed at Cycle 24 solar minimum using data obtained from the system. As result, we found that the solar wind structure evolves with rising solar activity in Cycle 24 rather differently from that in the past cycle. We also found that the solar wind density globally drops in Cycle 24.Our result suggests that the heliosphere is significantly shrinking, and this is of great importance from viewpoint of exploration of the outer heliosphere and study of the space climate.

Report

(5 results)
  • 2012 Annual Research Report   Final Research Report ( PDF )
  • 2011 Annual Research Report
  • 2010 Annual Research Report
  • 2009 Annual Research Report
  • Research Products

    (44 results)

All 2013 2012 2011 2010 2009 Other

All Journal Article (19 results) (of which Peer Reviewed: 17 results) Presentation (21 results) (of which Invited: 1 results) Remarks (4 results)

  • [Journal Article] Three-dimensional exploration of the solar wind using observations of interplanetary scintillation2013

    • Author(s)
      Tokumaru, M
    • Journal Title

      Proceedings of the Japan Academy Ser. B

      Volume: Vol.89(2) Pages: 67-79

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Heliolatitude and time variation of solar wind structure from in-situ measurements and interplanetary scintillation observations2013

    • Author(s)
      Sokol, J.M., M. Bzowski, M. Tokumaru, K. Fujiki, D.J. McComas
    • Journal Title

      Solar Physics

      Volume: Vol. 285 Pages: 167-200

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Solar parameters for modeling the interplanetary background2013

    • Author(s)
      M. Bzowski, 他
    • Journal Title

      Cross-Calibration of Past and Present Far UV Spectra of Solar System Objects and the Heliosphere

      Volume: ISSI Sci. Report Ser. 13 Pages: 67-138

    • DOI

      10.1007/978-1-4614-6384-9_3

    • ISBN
      9781461463832, 9781461463849
    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Three-dimensional exploration of the solar wind using observations of interplanetary scintillation2013

    • Author(s)
      M. Tokumaru
    • Journal Title

      Proceedings of the Japan Academy Ser. B

      Volume: 89 Pages: 67-79

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Global Observations of Evolving 3D Solar Wind Structure2012

    • Author(s)
      Tokumaru, M., K. Fujiki, H. Itoh, T. Iju, M. Kojima
    • Journal Title

      Proceedings of 3rd Hinode Scientific Meeting

      Volume: Vol.454 Pages: 413-420

    • Related Report
      2012 Final Research Report
  • [Journal Article] Long-term evolution in the global distribution of solar wind speed and density fluctuations for 1997-20092012

    • Author(s)
      Tokumaru, M., M. Kojima, and K. Fujiki
    • Journal Title

      Journal of Geophysical Research

      Volume: Vol. 117 Issue: A6

    • DOI

      10.1029/2011ja017379

    • Related Report
      2012 Annual Research Report 2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Two-station interplanetary scintillation measurements of solar wind speed near the Sun using the X-band radio signal of Nozomi spacecraft2012

    • Author(s)
      Tokumaru, M., S. Fujimaki, M. Higashiyama, A. Yokobe, T. Ohmi, K. Fujiki, and M. Kojima
    • Journal Title

      Solar Physics

      Volume: Vol.276 Issue: 1-2 Pages: 315-336

    • DOI

      10.1007/s11207-011-9864-9

    • Related Report
      2012 Final Research Report 2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The first three years of IBEX observations and our evolving heliosphere2012

    • Author(s)
      D.J. McComas, 他
    • Journal Title

      Astrophysical Journal

      Volume: 203 Issue: 1 Pages: 1-36

    • DOI

      10.1088/0067-0049/203/1/1

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Global Observations of Evolving 3D Solar Wind Structure2012

    • Author(s)
      M. Tokumaru, 他
    • Journal Title

      Proceedings of 3rd Hinode Scientific Meeting

      Volume: 454 Pages: 413-420

    • Related Report
      2012 Annual Research Report
  • [Journal Article] The prelude to the deep minimum between solar cycles 23 and 24: interplanetary scintillation signatures in the inner heliosphere2011

    • Author(s)
      Janardhan, P., S. K. Bisoi, S. Ananthakrishnan , M. Tokumaru , K. Fujiki
    • Journal Title

      Geophysical Research Letters

      Volume: Vol. 38 Issue: 20 Pages: n/a-n/a

    • DOI

      10.1029/2011gl049227

    • Related Report
      2012 Final Research Report 2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A newly-developed UHF radiotelescope for interplanetary scintillation observations; Solar Wind Imaging Facility2011

    • Author(s)
      Tokumaru, M., M. Kojima, K. Fujiki, M. Maruyama, Y. Maruyama, H. Ito, and T. Iju
    • Journal Title

      Radio Science

      Volume: Vol.46 Issue: 5

    • DOI

      10.1029/2011rs004694

    • Related Report
      2012 Final Research Report 2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A snapshot of the sun near solar minimum, The Whole Heliospgeric Interval2011

    • Author(s)
      Thompson, B.J, M.Tokumaru, 他
    • Journal Title

      Solar Physics

      Volume: 274 Issue: 1-2 Pages: 29-56

    • DOI

      10.1007/s11207-011-9891-6

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Solar cycle variations of the solar wind speed distribution from 1985-20082010

    • Author(s)
      Tokumaru, M., M. Kojima, and K. Fujiki
    • Journal Title

      Journal of Geophysical Research

      Volume: Vol.115

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Solar cycle variations of the solar wind speed distribution from 1985-20082010

    • Author(s)
      Tokumaru, M., M.Kojima, K.Fujiki
    • Journal Title

      Journal of Geophysical Research

      Volume: 115

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A summary of 3-D reconstructions of the Whole Heliosphere Interval and comparison with in-ecliptic solar wind measurements fro STEREO, ACE and Wind instrumentation2010

    • Author(s)
      Bisi, M.M., B.V.Jackson, J.M.Clover, P.P.Hick, A.Buffington, M.Tokumaru
    • Journal Title

      Highlights of Astronomy

      Volume: 15 Pages: 480-483

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Solar cycle variations of the solar wind speed distribution from 1985-20082010

    • Author(s)
      Tokumaru, M., et al.
    • Journal Title

      J.Geophys.Res. 115(in press)

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Non-dipolar solar wind structure observed in the cycle 23/24 minimum2009

    • Author(s)
      Tokumaru, M., M. Kojima, K. Fujiki, and K. Hayashi
    • Journal Title

      Geophysical Research Letter

      Volume: Vol. 36 Issue: 9

    • DOI

      10.1029/2009gl037461

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Non-dipolar solar wind structure observed in the cycle 23/24 minimum2009

    • Author(s)
      Tokumaru, M., et al.
    • Journal Title

      Geophys.Res.Lett. 36

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Low-resolution STELab IPS 3D reconstructions of the Whole Heliospheric Interval and comparison with in-ecliptic solar wind measurements from STEREO and Wind instrumentation2009

    • Author(s)
      Bisi, M.M., et al.
    • Journal Title

      Solar Physics 256

      Pages: 201-217

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Presentation] サイクル24極大期の太陽風の特徴2013

    • Author(s)
      徳丸宗利
    • Organizer
      太陽圏シンポジウム
    • Place of Presentation
      名古屋大学野依学術記念交流館ホール
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] Evolution of global distribution of the solar wind from cycle 23 to the early phase of cycle 242012

    • Author(s)
      Tokumaru, M.
    • Organizer
      the Solar Wind 13
    • Place of Presentation
      Hawaii, USA
    • Related Report
      2012 Final Research Report
  • [Presentation] サイクル24上昇期における太陽風大規模構造の発展2012

    • Author(s)
      徳丸宗利、他
    • Organizer
      地球電磁気・地球惑星圏学会第132回講演会
    • Place of Presentation
      札幌コンベンションセンター
    • Related Report
      2012 Annual Research Report
  • [Presentation] Evolution of global distribution of the solar wind from cycle 23 to the early phase of cycle 242012

    • Author(s)
      M. Tokumaru, 他
    • Organizer
      Solar Wind 13
    • Place of Presentation
      Sheraton Keauhou Bay Resort, Hawaii, USA
    • Related Report
      2012 Annual Research Report
  • [Presentation] Long-term variation in distribution of solar wind density fluctuations for 1997-20092011

    • Author(s)
      Tokumaru, M., 他
    • Organizer
      2011 AGU Fall meeting
    • Place of Presentation
      Moscone Center (San Francisco, USA)
    • Year and Date
      2011-12-07
    • Related Report
      2011 Annual Research Report
  • [Presentation] 新3地点IPS観測システムの構築と最近の太陽風観測結果2011

    • Author(s)
      徳丸宗利, 他
    • Organizer
      地球電磁気・地球惑星圏学会第130回講演会
    • Place of Presentation
      神戸大学(兵庫県)
    • Year and Date
      2011-11-06
    • Related Report
      2011 Annual Research Report
  • [Presentation] Global observations of the solar wind with STEL IPS array2011

    • Author(s)
      Tokumaru, M., 他
    • Organizer
      AOGS 2011
    • Place of Presentation
      Taipei International Convention Center (Taipei)(招待講演)
    • Year and Date
      2011-08-11
    • Related Report
      2011 Annual Research Report
  • [Presentation] 1997-2009年における太陽風密度ゆらぎ分布の長期変動2011

    • Author(s)
      徳丸宗利, 他
    • Organizer
      日本地球惑星科学連合2011年連合学会
    • Place of Presentation
      幕張国際会議場(千葉県)
    • Year and Date
      2011-05-27
    • Related Report
      2011 Annual Research Report
  • [Presentation] Long-term variation in distribution of solar wind density fluctuations for 1997-20092011

    • Author(s)
      Tokumaru, M.
    • Organizer
      2011 AGU Fall Meeting
    • Place of Presentation
      San Francisco, USA.
    • Related Report
      2012 Final Research Report
  • [Presentation] Global observations of the solar wind with STEL IPS array2011

    • Author(s)
      Tokumaru, M.
    • Organizer
      AOGS 2011
    • Place of Presentation
      Taipei, Taiwan.
    • Related Report
      2012 Final Research Report
  • [Presentation] A New Radiotelescope for Interplanetary Scintillation Observations : Solar Wind Imaging Facility (SWIFT)2010

    • Author(s)
      Tokumaru, M., M.Kojima, K.Fujiki, K.Maruyama, Y.Maruyama, H.Itoh, T.Iju
    • Organizer
      2010 Asia-Pacific Radio Science Conference
    • Place of Presentation
      富山国際会議センター
    • Year and Date
      2010-09-24
    • Related Report
      2010 Annual Research Report
  • [Presentation] 太陽圏イメージング装置による327MHzマッピング観測2010

    • Author(s)
      徳丸宗利、丸山一夫、丸山益史、藤木謙一、小島正宜
    • Organizer
      日本天文学会2010年秋季年会
    • Place of Presentation
      金沢大学角間キャンパス
    • Year and Date
      2010-09-24
    • Related Report
      2010 Annual Research Report
  • [Presentation] Evolution of 3D solar wind structure during cycles 22 and 232010

    • Author(s)
      Tokumaru, M., K.Fujiki, M.Kojima
    • Organizer
      SCOSTEP Syposium 2010 STP12
    • Place of Presentation
      Berlin (Germany)
    • Year and Date
      2010-07-12
    • Related Report
      2010 Annual Research Report
  • [Presentation] サイクル22, 23における太陽風速度分布の長期変動2010

    • Author(s)
      徳丸宗利, 小島正宜, 藤木謙一, 伊集朝哉
    • Organizer
      2010年地球惑星科学関連学会合同大会
    • Place of Presentation
      幕張メッセ国際会議揚
    • Year and Date
      2010-05-28
    • Related Report
      2010 Annual Research Report
  • [Presentation] 太陽風構造の長期変動と現太陽活動極小期の特色2010

    • Author(s)
      徳丸宗利, et al.
    • Organizer
      平成21年度太陽圏シンポジウム
    • Place of Presentation
      名古屋大学 (愛知県)
    • Year and Date
      2010-01-28
    • Related Report
      2009 Annual Research Report
  • [Presentation] A New Radiotelescope for Interplanetary Scintillation Observations: Solar Wind Imaging Facility (SWIFT)2010

    • Author(s)
      Tokumaru, M.
    • Organizer
      AP-RASC 2010
    • Place of Presentation
      Toyama, Japan
    • Related Report
      2012 Final Research Report
  • [Presentation] Evolution of 3D solar wind structure during cycles 22 and 232010

    • Author(s)
      Tokumaru, M.
    • Organizer
      SCOSTEP Symposium 2010 STP12
    • Place of Presentation
      Berlin, Germany.
    • Related Report
      2012 Final Research Report
  • [Presentation] Global observations of evolving 3D solar wind structure2009

    • Author(s)
      徳丸宗利, et al.
    • Organizer
      3rd Hinode Scientific Meeting
    • Place of Presentation
      Hitotsubashi Memorial Hall (東京都)
    • Year and Date
      2009-12-04
    • Related Report
      2009 Annual Research Report
  • [Presentation] 太陽圏イメージング装置の開発2009

    • Author(s)
      徳丸宗利, 他
    • Organizer
      日本天文学会2009年秋季年会
    • Place of Presentation
      山口大学 (山口県)
    • Year and Date
      2009-09-15
    • Related Report
      2009 Annual Research Report
  • [Presentation] 太陽風観測用UHF電波望遠鏡フロントエンドのダイポールアレイ設計2009

    • Author(s)
      伊集朝哉, 他
    • Organizer
      日本天文学会2009年秋季年会
    • Place of Presentation
      山口大学 (山口県)
    • Year and Date
      2009-09-15
    • Related Report
      2009 Annual Research Report
  • [Presentation] lobal Observations of Evolving 3D Solar Wind Structure2009

    • Author(s)
      Tokumaru, M.
    • Organizer
      3rd Hinode Scientific Meeting
    • Place of Presentation
      Tokyo, Japan.
    • Related Report
      2012 Final Research Report
  • [Remarks]

    • URL

      http://stsw1.stelab.nagoya-u.ac.jp/

    • Related Report
      2012 Final Research Report
  • [Remarks] IPSによる太陽風観測

    • URL

      http://stsw1.stelab.nagoya-u.ac.jp/ips_data.html

    • Related Report
      2012 Annual Research Report
  • [Remarks]

    • URL

      http://stsw1.stelab.nagoya-u.ac.jp/

    • Related Report
      2011 Annual Research Report
  • [Remarks]

    • URL

      http://stesun5.stelab.nagoya-u.ac.jp

    • Related Report
      2010 Annual Research Report

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Published: 2009-04-01   Modified: 2019-07-29  

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