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A study on mean features and variability of meandering and ring formations in the Kuroshio Extension and Gulf Stream regions

Research Project

Project/Area Number 25800258
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Meteorology/Physical oceanography/Hydrology
Research InstitutionHokkaido University

Principal Investigator

Sasaki Yoshinori  北海道大学, 理学(系)研究科(研究院), 講師 (50604815)

Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords海洋物理・陸水学 / 気候変動 / 海洋ジェット / 黒潮続流 / メキシコ湾流
Outline of Final Research Achievements

A new method that consists of the detection of the jet path changes and the tracking of a mesoscale eddy is proposed to objectively capture eddy shedding from an oceanic jet based on sea surface height data. This method is applied to the Kuroshio Extension and Gulf Stream jets. Based on these results, it is revealed that the pinched-off mesoscale eddies play an important role in across-jet transports of heat and nutrients. In addition, the fluctuations of the eddy formation are negatively correlated with the strength of the jets, suggesting deceleration of the jets by eddy formation.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (15 results)

All 2016 2015 2014 2013 Other

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 3 results,  Acknowledgement Compliant: 1 results) Presentation (9 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results) Remarks (2 results)

  • [Journal Article] 西岸境界流およびその続流の変動に関する理論的・解析的研究2016

    • Author(s)
      佐々木克徳
    • Journal Title

      海の研究

      Volume: 25 Pages: 1-16

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Climatological mean features and interannual to decadal variability of ring formations in the Kuroshio Extension region2015

    • Author(s)
      Sasaki, Y. N., and S. Minobe
    • Journal Title

      Journal of Oceanography

      Volume: 未定 Issue: 5 Pages: 499-509

    • DOI

      10.1007/s10872-014-0270-4

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Oceanic fronts and jets around Japan: a review2015

    • Author(s)
      Kida, S., H. Mitsudera, S. Aoki, X. Guo, S. Ito, F. Kobashi, N. Komori, A. Kubokawa, T. Miyama, R. Morie, H. Nakamura, T. Nakamura, H. Nakano, H. Nishigaki, M. Nonaka, H. Sasaki, Y. N. Sasaki, T. Suga, S. Sugimoto, B. Taguchi, K. Takaya, T. Tozuka, H. Tsujino, and N. Usui
    • Journal Title

      Journal of Oceanography

      Volume: 未定 Issue: 5 Pages: 1561-1577

    • DOI

      10.1007/s10872-015-0283-7

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Decadal sea level variability along the coast of Japan in response to ocean circulation changes2014

    • Author(s)
      Y. N. Sasaki, S. Minobe and Y. Miura
    • Journal Title

      Journal of Geophysical Research: Oceans

      Volume: 119 Issue: 1 Pages: 266-275

    • DOI

      10.1002/2013jc009327

    • NAID

      120005457011

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] Interannual variability of ring formations in the Gulf Stream region2016

    • Author(s)
      Sasaki, Y. N.
    • Organizer
      Ocean Sciences Meeting 2016
    • Place of Presentation
      New Orleans (USA)
    • Year and Date
      2016-02-22
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Decadal variability of the Kuroshio Extension jet and its relation to coastal sea level along Japan2016

    • Author(s)
      Sasaki, Y. N., S. Minobe, Y. Miura, and N. Schneider
    • Organizer
      CLIVAR/JAMSTEC Workshop on the Kuroshio Current and Extension System
    • Place of Presentation
      JAMSTEC横浜研究所(神奈川県横浜市)
    • Year and Date
      2016-01-12
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Decadal variability of the Kuroshio Extension jet and its relation to coastal sea level along Japan2015

    • Author(s)
      Sasaki, Y. N., S. Minobe, Y. Miura, and N. Schneider
    • Organizer
      The 2nd Open Science Symposium on Western Pacific Ocean Circulation and Climate
    • Place of Presentation
      Busan (Korea)
    • Year and Date
      2015-10-26
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 西岸境界流およびその続流の変動に関する理論的・解析的研究2015

    • Author(s)
      佐々木克徳
    • Organizer
      2015年度日本海洋学会春季大会
    • Place of Presentation
      東京海洋大学(東京都港区)
    • Year and Date
      2015-03-23
    • Related Report
      2014 Research-status Report
  • [Presentation] Climatological mean features and interannual to decadal variability of ring formations in the Kuroshio Extension region2014

    • Author(s)
      Sasaki, Y. N., and S. Minobe
    • Organizer
      2014 AGU Fall Meeting
    • Place of Presentation
      The Moscone Center (USA)
    • Year and Date
      2014-12-18
    • Related Report
      2014 Research-status Report
  • [Presentation] Decadal sea level variability along the coast of Japan in response to ocean circulation changes2014

    • Author(s)
      Sasaki, Y. N., S. Minobe, and Y. Miura
    • Organizer
      Asia Oceania Geosciences Society 2014
    • Place of Presentation
      ロイトン札幌(北海道)
    • Year and Date
      2014-07-31
    • Related Report
      2014 Research-status Report
  • [Presentation] Regional influence of basin-scale wind stress variability via jet-trapped Rossby waves in the western North Pacific2013

    • Author(s)
      Minobe, S., Y. N. Sasaki, Y. Miura, and N. Schneider
    • Organizer
      Second Regional Climate Modeling Workshop
    • Place of Presentation
      Novotel Ambassador Busan (韓国)
    • Related Report
      2013 Research-status Report
    • Invited
  • [Presentation] 日本沿岸の海面高度変動に対するロスビー波の影響

    • Author(s)
      佐々木 克徳,見延 庄士郎,三浦 優司
    • Organizer
      2014年度日本海洋学会春季大会
    • Place of Presentation
      東京海洋大学(東京都)
    • Related Report
      2013 Research-status Report
  • [Presentation] Decadal sea level variability along the coast of Japan in response to ocean circulation changes

    • Author(s)
      Sasaki, Y. N., S. Minobe, and Y. Miura
    • Organizer
      Ocean Sciences Meeting 2014
    • Place of Presentation
      Honolulu convention center (アメリカ)
    • Related Report
      2013 Research-status Report
  • [Remarks]

    • URL

      http://www.sci.hokudai.ac.jp/~sasakiyo/

    • Related Report
      2015 Annual Research Report
  • [Remarks] sealevelJP.pdf

    • URL

      http://www.sci.hokudai.ac.jp/~sasakiyo/sealevelJP.pdf

    • Related Report
      2013 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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