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Mysteries of baroclinic circulation in the upper ocean: Eastern South Indian Ocean

Research Project

Project/Area Number 16K05562
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

Furue Ryo  国立研究開発法人海洋研究開発機構, 付加価値情報創生部門(アプリケーションラボ), グループリーダー代理 (30311640)

Project Period (FY) 2016-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords沿岸流 / 亜熱帯循環 / 波動力学 / 南東インド洋 / 沿岸捕捉波 / 惑星ロスビー波 / 季節変動 / 数値モデル / 海洋力学 / オーストラリア / 潜流 / 東岸境界流 / ルーイン潜流 / 海洋大循環モデル / インド洋上層循環 / ルーイン海流系 / 渦解像モデル / 大循環モデル / オーストラリア沿岸流 / ルーイン海流 / 質量収支 / 海洋物理
Outline of Final Research Achievements

The dynamics of the basin-scale circulation of the upper ocean is generally well understood in the classical framework of wind-driven general circulation. There are still knowledge gaps in the interaction of the general circulation with the coastal flows. This study has clarified how the Leeuwin Current, a surface, southward-flowing coastal current along the west coast of Australia, is a part of a shallow overturning circulation connecting the broad surface eastward flow and a matching subsurface westward flow. The pathway of the Leeuwin Undercurrent is described. In addition, a new shallow seasonal undercurrent is discovered on the continental slope of Northwest Australia and a new deeper seasonal variability is found that propagates counter-clockwise along the west, south, southwest, and east coasts of Australia. These variabilities potentially propagate westward from the coast. This issue will be an interesting subject for future studies.

Academic Significance and Societal Importance of the Research Achievements

本研究は、豪州を例に取り、海盆の大循環とその東側の沿岸流の相互作用の一形態を明らかにし、また亜表層の大陸斜面に沿う季節変動流を二つ見つけたものである。ルーイン海流は密度駆動であるが、同様に密度駆動だと思われる他の沿岸流(ポルトガル沿岸など)にも応用できるかも知れない。ルーイン潜流は大陸斜面に沿うことをやめ急に沖に出てなくなってしまうことがはっきりしたが、この力学は不明である。一方、大陸斜面上の季節変動は、その励起源が不明であり、またどこまで伝わりどこで消散するのか・どの程度海盆内部へ伝わるのかも不明である。このような新しい研究題材を発見したといえる。

Report

(9 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (30 results)

All 2022 2021 2019 2018 2017 2016 Other

All Int'l Joint Research (11 results) Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 3 results,  Acknowledgement Compliant: 1 results) Presentation (13 results) (of which Int'l Joint Research: 7 results,  Invited: 1 results) Remarks (3 results)

  • [Int'l Joint Research] Xiamen University Malaysia(マレーシア)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] University of Tasmania(オーストリア)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] 厦門大学マレーシア校(マレーシア)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] ハワイ大学(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] タスマニア大学(オーストラリア)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] タスマニア大学(オーストラリア)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] タスマニア大学/ニューサウスウェールズ大学(オーストリア)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] タスマニア大学/ニューサウスウェールズ大学(オーストラリア)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] タスマニア大学(オーストラリア)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] ハワイ大学(米国)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] トゥールーズ大学(フランス)

    • Related Report
      2016 Research-status Report
  • [Journal Article] A seasonal undercurrent along the northwest coast of Australia2022

    • Author(s)
      Ryo Furue
    • Journal Title

      Frontiers in Marine Science

      Volume: 8

    • DOI

      10.3389/fmars.2021.806659

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The three-dimensional structure of the Leeuwin Current System in density coordinates in an eddy-resolving OGCM2019

    • Author(s)
      Furue Ryo
    • Journal Title

      Ocean Modelling

      Volume: 138 Pages: 36-50

    • DOI

      10.1016/j.ocemod.2019.03.001

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] On the Leeuwin Current System and its linkage to zonal flows in the South Indian Ocean as inferred from a gridded hydrography2017

    • Author(s)
      R. Furue, K. Guerreiro, H. E. Phillips, J. P. McCreary, and N. L. Bindoff
    • Journal Title

      Journal of Physical Oceanography

      Volume: 47 Issue: 3 Pages: 583-602

    • DOI

      10.1175/jpo-d-16-0170.1

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] 豪州北西岸の季節的潜流2021

    • Author(s)
      古惠 亮
    • Organizer
      日本海洋学会2021年秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Residual-mean circulation of the Leeuwin Current System in an eddy-resolving general circulation model2018

    • Author(s)
      Ryo Furue
    • Organizer
      JpGU 2018 at Makuhari
    • Related Report
      2018 Research-status Report
  • [Presentation] Residual-mean Circulation of the Leeuwin Current System in an Eddy-resolving General Circulation Model2018

    • Author(s)
      Ryo Furue
    • Organizer
      AOGS 2018 at Honolulu
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] The three-dimensional structure of the South Australian Current System2018

    • Author(s)
      Ryo Furue
    • Organizer
      日本海洋学会秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] The Leeuwin Current System and South Australian Current System based on a climatological, high-resolution gridded hydrography2018

    • Author(s)
      Ryo Furue
    • Organizer
      The 6th Argo Science Workshop
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Northern boundary circulation properties of the South Australian Current System based on a gridded hydrography2018

    • Author(s)
      E. Duran, H.E. Phillips, R. Furue, P. Spence, N.L. Bindoff
    • Organizer
      AMOS-ICSHMO 2018
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Seasonal Forcing of the Leeuwin Current2018

    • Author(s)
      T. Tian, H.E. Phillips, R. Furue
    • Organizer
      AMOS-ICSHMO 2018
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] On the Leeuwin Current System and its linkage to zonal flows in the South Indian Ocean as inferred from a gridded hydrography2017

    • Author(s)
      Ryo Furue, Kevin Guerreiro, Helen E. Phillips, Julian P. McCreary, Nathaniel L. Bindoff
    • Organizer
      Meeting on Perspectives in Computational Atmosphere and Ocean Science and 8th OFES International Workshop
    • Place of Presentation
      Nagoya University (愛知県名古屋市)
    • Year and Date
      2017-03-14
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] ルーイン海流系の力学2017

    • Author(s)
      古惠 亮
    • Organizer
      この10年の海洋物理学を振り返る(杉ノ原伸夫・川辺正樹記念シンポジウム)
    • Place of Presentation
      東京大学大気海洋研究所(千葉県柏市)
    • Year and Date
      2017-01-28
    • Related Report
      2016 Research-status Report
  • [Presentation] On the Leeuwin Current System and its linkage to zonal flows in the South Indian Ocean2017

    • Author(s)
      古惠 亮 , K. Guerreiro, H.E. Phillips, J.P. McCreary, N.L. Bindoff
    • Organizer
      AOGS 2017 at Singapore
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] On the Leeuwin Current System and its linkage to zonal flows in the South Indian Ocean2017

    • Author(s)
      古惠 亮 , K. Guerreiro, H.E. Phillips, J.P. McCreary, N.L. Bindoff
    • Organizer
      JpGU/AGU 2017 at Makuhari
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Leeuwin Currentと海底地形の役割・鉛直構造についての考察2017

    • Author(s)
      古惠 亮
    • Organizer
      海洋力学理論の研究会 (九州大学 応用力学研究所)
    • Related Report
      2017 Research-status Report
  • [Presentation] 格子化水温塩分資料に基づくルーイン海流系の構造2016

    • Author(s)
      古惠 亮, Kevin Guerreiro, Helen E. Phillips, Julian P. McCreary, Nathaniel L. Bindoff
    • Organizer
      日本海洋学会2016年秋季大会
    • Place of Presentation
      鹿児島大学(鹿児島県鹿児島市)
    • Year and Date
      2016-09-13
    • Related Report
      2016 Research-status Report
  • [Remarks] Helen Phillips's Profiles

    • URL

      http://www.utas.edu.au/profiles/staff/imas/helen-phillips

    • Related Report
      2016 Research-status Report
  • [Remarks] Julian McCreary's Profiles

    • URL

      http://iprc.soest.hawaii.edu/people/mccreary.php

    • Related Report
      2016 Research-status Report
  • [Remarks] Kevin Guerreiro's Profiles

    • URL

      https://www.researchgate.net/profile/Kevin_Guerreiro

    • Related Report
      2016 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2025-01-30  

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