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Warm Water Volume in the western equatorial Pacific and El Nino-La Nina cycle

Research Project

Project/Area Number 18540440
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Meteorology/Physical oceanography/Hydrology
Research InstitutionJapan Agency for Marine-Earth Science and Technology

Principal Investigator

ISHIDA Akio  Japan Agency for Marine-Earth Science and Technology, 地球環境観測研究センター, 研究員 (60359148)

Co-Investigator(Kenkyū-buntansha) KASHINO Yuj  独立行政法人海洋研究開発機構, 地球環境観測研究センター, 技術研究副主幹 (00421876)
HOSODA Shigeki  独立行政法人海洋研究開発機構, 地球環境観測研究センター, 研究員 (60399582)
Co-Investigator(Renkei-kenkyūsha) KASHINO Yuji  独立行政法人海洋研究開発機構, 地球環境観測研究センター, 技術研究副主幹 (00421876)
HOSODA Shigeki  独立行政法人海洋研究開発機構, 地球環境観測研究センター, 研究員 (60399582)
Project Period (FY) 2006 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥3,520,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥420,000)
Fiscal Year 2008: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2007: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2006: ¥1,700,000 (Direct Cost: ¥1,700,000)
Keywords海洋物理 / 気候変動
Research Abstract

2006年から2008年の2回の船舶観測により、エルニーニョ期にミンダナオ海流が強化されていることを捉えた。
これはトライトンブイデータから求めた力学高度の結果とも調和的であり、フィリピン沖において暖水が放出されていることを示唆している。
また、アルゴデータ等から、局所的な風よりも東方遠方で励起されたロスビー波の西方伝播による効果が大きいことが示唆された。
さらに、数値モデルによる解析から、暖水輸送は南北非対称であり、南半球では西岸域での輸送が、中央から東部での輸送を相殺するのに対して、北半球では相殺せず、赤道域の暖水量変動に北半球側の暖水交換の寄与が大きいことが分かった。
この非対称性は風に強制されたロスビー波の西方伝播と関連していることが分かった。

Report

(4 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • Research Products

    (29 results)

All 2009 2008 2007

All Journal Article (8 results) (of which Peer Reviewed: 8 results) Presentation (21 results)

  • [Journal Article] Global surface layer salinity change and its implication based on Argo float array Surface salinity change detected by Argo floats2009

    • Author(s)
      Hosoda, S., T. Suga, N. Shikama, and K. Mizuno
    • Journal Title

      J. Oceanogr

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Observations of the North Equatorial Current2009

    • Author(s)
      Kashino, Y., N. Espana, F. Syamsudin, K. Richards, T. Jensen, P. Dutrieux, and A. Ishida
    • Journal Title

      Mindanao Current, and Kuroshio Current System during the 2006/07 El Nino and 2007/08 La Nina, J.Oceanogr 65

      Pages: 325-333

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Observations of the North Equatorial Current, Mindanao Current, and Kuroshio Current System during the 2006/07 El Nino and 2007/08 La Nina2009

    • Author(s)
      Kashino, Y.
    • Journal Title

      Journal of Oceanography 65

      Pages: 325-333

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Global surface layer salinity change detected by Argo and its implication for hydrological cycle intensification2009

    • Author(s)
      Hosoda, S.
    • Journal Title

      Journal of Oceanography (印刷中)

    • NAID

      10025554375

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] North-south asymmetry of warm water volume transport related with El Nino variability2008

    • Author(s)
      Ishida, A., Y. Kashino, S. Hosoda, and K. Ando
    • Journal Title

      Geophys. Res. Lett 35

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Semiannual variation in the western tropical Pacific Ocean2008

    • Author(s)
      Qu, T., J. Gan, A. Ishida, Y. Kashino, and T. Tozuka
    • Journal Title

      Geophys. Res. Lett 35

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Semiannual variation in the western tropical Pacific Ocean2008

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

      Geophysical Research Letters 35

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] North-south asymmetry of warm water volume transport related with El Nino variability2008

    • Author(s)
      Ishida, A.
    • Journal Title

      Geophysical Research Letters 35

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Presentation] 北赤道海流・ミンダナオ海流・黒潮システムの観測 - MR06-05 Leg3, MR07-07 Leg1航海観測結果より -2009

    • Author(s)
      柏野祐二
    • Organizer
      Blue Earth '09 シンポジウム
    • Place of Presentation
      立教大学.
    • Year and Date
      2009-03-13
    • Related Report
      2008 Final Research Report
  • [Presentation] 北赤道海流・ミンダナオ海流・黒潮システムの観測-MR06-05 Leg3, MR07-07 Leg1航海観測結果より-2009

    • Author(s)
      柏野祐二
    • Organizer
      Blue Earth '09シンポジウム
    • Place of Presentation
      立教大学
    • Year and Date
      2009-03-13
    • Related Report
      2008 Annual Research Report
  • [Presentation] Surface and subsurface layer salinity change in the global ocean using Argo float data2008

    • Author(s)
      Hosoda, S.
    • Organizer
      AGU Fall Meeting
    • Place of Presentation
      San Francisco
    • Year and Date
      2008-12-18
    • Related Report
      2008 Final Research Report
  • [Presentation] Surface and subsurface layer salinity change in the global ocean using Argo float data2008

    • Author(s)
      Shigeki Hosoda
    • Organizer
      AGU Fall Meeting
    • Place of Presentation
      Moscone Center, San Francisco, USA
    • Year and Date
      2008-12-18
    • Related Report
      2008 Annual Research Report
  • [Presentation] エルニーニョに関連した暖水輸送経年変動の南北非対称性 (II) ロスビー波伝播と南北流量変動2008

    • Author(s)
      石田明生
    • Organizer
      2008年度日本海洋学会秋季大会
    • Place of Presentation
      広島国際大学
    • Year and Date
      2008-09-25
    • Related Report
      2008 Final Research Report
  • [Presentation] 北赤道海流・ミンダナオ海流・黒潮システムの観測2008

    • Author(s)
      柏野祐二
    • Organizer
      2008年度日本海洋学会秋季大会
    • Place of Presentation
      広島国際大学
    • Year and Date
      2008-09-25
    • Related Report
      2008 Annual Research Report 2008 Final Research Report
  • [Presentation] エルニーニョに関連した暖水輸送経年変動の南北非対称性(II)ロスビー波伝播と南北流量変動2008

    • Author(s)
      石田明生
    • Organizer
      2008年度日本海洋学会秋季大会
    • Place of Presentation
      広島国際大学
    • Year and Date
      2008-09-25
    • Related Report
      2008 Annual Research Report
  • [Presentation] エルニーニョに関連した暖水輸送経年変動の南北非対称性について2008

    • Author(s)
      石田 明生
    • Organizer
      日本海洋学会春季大会
    • Place of Presentation
      東京海洋大学
    • Year and Date
      2008-03-27
    • Related Report
      2007 Annual Research Report
  • [Presentation] フィリピン海における海洋変動 -トライトンブイによる観測結果-2008

    • Author(s)
      柏野祐二
    • Organizer
      Blue Earth'08 第11回みらいシンポジウム
    • Place of Presentation
      横浜市立大学
    • Year and Date
      2008-03-13
    • Related Report
      2008 Final Research Report
  • [Presentation] フィリピン海における海洋変動-トライトンブイによる観測結果-2008

    • Author(s)
      柏野 祐二
    • Organizer
      Blue Earth'08第11回みらいシンポジウム
    • Place of Presentation
      横浜市立大学
    • Year and Date
      2008-03-13
    • Related Report
      2007 Annual Research Report
  • [Presentation] Different discharge mechanisms of warm water between northern and southern Pacific Oceans during El Nino2008

    • Author(s)
      Ishida, A
    • Organizer
      2008 Ocean Sciences Meeting
    • Place of Presentation
      Orlando, Florida, U.S.A.
    • Year and Date
      2008-03-05
    • Related Report
      2008 Final Research Report
  • [Presentation] Annual and interannual ocean variations in the Mindanao Dome region: Observational study2008

    • Author(s)
      Kashino, Y
    • Organizer
      2008 Ocean Sciences Meeting
    • Place of Presentation
      Orlando, Florida
    • Year and Date
      2008-03-05
    • Related Report
      2008 Final Research Report
  • [Presentation] Surface salinity change detected by Argo floats2008

    • Author(s)
      Hosoda, S
    • Organizer
      2008 Ocean Sciences Meeting
    • Place of Presentation
      Orlando, Florida, U.S.A
    • Year and Date
      2008-03-05
    • Related Report
      2008 Final Research Report
  • [Presentation] Difierent discharge mechanisms of warm water between northern and southern Pacific Oceans during El Nino2008

    • Author(s)
      Akio Ishida
    • Organizer
      2008 Ocean Sciences Meeting
    • Place of Presentation
      Convention Center, Orlando, Florida, U.S.A
    • Year and Date
      2008-03-05
    • Related Report
      2007 Annual Research Report
  • [Presentation] Annual and interannual ocean variations in the Mindanao Dome region:Observational study2008

    • Author(s)
      Yuji Kashino
    • Organizer
      2008 Ocean Sciences Meeting
    • Place of Presentation
      Convention Center, Orlando, Florida, U.S.A
    • Year and Date
      2008-03-05
    • Related Report
      2007 Annual Research Report
  • [Presentation] Global surface salinity change detected by Argo floats-Enhancement of global hydrological cycle-2008

    • Author(s)
      Shigeki Hosoda
    • Organizer
      2008 Ocean Sciences Meeting
    • Place of Presentation
      Convention Center, Orlando, Florida, U.S.A
    • Year and Date
      2008-03-05
    • Related Report
      2007 Annual Research Report
  • [Presentation] エルニーニョに関連した暖水輸送経年変動の南北非対称性について2008

    • Author(s)
      石田明生
    • Organizer
      2008年度日本海洋学会春季大会
    • Place of Presentation
      東京海洋大学.
    • Year and Date
      2008-03-02
    • Related Report
      2008 Final Research Report
  • [Presentation] ミンダナオドーム海域における海洋の季節・経年変動2007

    • Author(s)
      柏野祐二
    • Organizer
      日本海洋学会秋季大会
    • Place of Presentation
      琉球大学工学部
    • Year and Date
      2007-09-28
    • Related Report
      2008 Final Research Report
  • [Presentation] ミンダナオドーム海域における海洋の季節・経年変動2007

    • Author(s)
      柏野 祐二
    • Organizer
      日本海洋学会秋季大会
    • Place of Presentation
      琉球大学 工学部
    • Year and Date
      2007-09-28
    • Related Report
      2007 Annual Research Report
  • [Presentation] Sea surface salinity variation detected by the Argo float array in the World Ocean: Evidence of an enhanced hydrological cycle?2007

    • Author(s)
      Hosoda, S
    • Organizer
      2007 International Union of Geodesy and Geophysics
    • Place of Presentation
      University of Perugia, Perugia, Italy
    • Year and Date
      2007-07-07
    • Related Report
      2008 Final Research Report
  • [Presentation] Sea surface salinity variation detected by the Argo float array in the World Ocean:Evidence of an enhanced hydrological cycle2007

    • Author(s)
      Shigeki Hosoda
    • Organizer
      2007 International Union of Geodesy and Geophysics
    • Place of Presentation
      University of Perugia, Perugia,Italy
    • Year and Date
      2007-07-07
    • Related Report
      2007 Annual Research Report

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Published: 2006-04-01   Modified: 2016-04-21  

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