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Turbulent mixing of momentum due to Langmuir circulation: Field and numerical experiments

Research Project

Project/Area Number 25287123
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypePartial Multi-year Fund
Section一般
Research Field Meteorology/Physical oceanography/Hydrology
Research InstitutionKyoto University

Principal Investigator

Yoshikawa Yutaka  京都大学, 理学(系)研究科(研究院), 准教授 (40346854)

Co-Investigator(Renkei-kenkyūsha) Baba Yasuyuki  京都大学, 防災研究所, 准教授 (30283675)
Mizutani Hideaki  京都大学, 防災研究所, 助手 (00636756)
Research Collaborator Yufu Kei  九州大学, 応用力学研究所, 技術職員
Ushijima Yusuke  京都大学, 大学院理学研究科
Fujiwara Yasushi  京都大学, 大学院理学研究科
Mannen Takahiro  京都大学, 大学院理学研究科
Project Period (FY) 2013-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥12,870,000 (Direct Cost: ¥9,900,000、Indirect Cost: ¥2,970,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2013: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Keywords海洋表層混合 / ラングミュア循環 / 海洋物理 / ADCP観測 / ラージエディシミュレーション / 3次元流動構造観測
Outline of Final Research Achievements

Field experiments of turbulent velocities were conducted in order to reveal Langmuir circulation, a potential ingredient of ocean surface mixing. Coherent structures of Langmuir circulation were successfully captured in our field experiments. Observed turbulence was intense when surface waves, a driver of Langmuir circulation, were strong, while its intensity was also affected by surface heat flux. We also find that wind forcing play an important role in Langmuir turbulence when wind and wave are misaligned. Numerical experiments support these observed features. These results indicate that Langmuir turbulence mixes ocean surface strongly when surface waves are intense, but associated mixing properties are highly dependent on wind and wave directions.

Report

(5 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Annual Research Report
  • 2014 Annual Research Report
  • 2013 Annual Research Report
  • Research Products

    (20 results)

All 2017 2016 2015 2014 2013

All Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results,  Acknowledgement Compliant: 2 results) Presentation (14 results)

  • [Journal Article] 海洋表層混合層における乱流混合に関する研究2017

    • Author(s)
      吉川 裕、遠藤 貴洋
    • Journal Title

      海の研究

      Volume: 印刷中

    • NAID

      130007482155

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dynamics and early post-tsunami evolution of floating marine debris near Fukushima Daiichi2017

    • Author(s)
      John Philip Matthews, Lev Ostrovsky, Yutaka Yoshikawa, Satoru Komori and Hitoshi Tamura
    • Journal Title

      Nature Geoscience

      Volume: 印刷中

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Effects of diurnal cycle of surface heat flux on wind-driven flow2016

    • Author(s)
      Y. Ide and Y. Yoshikawa
    • Journal Title

      Journal of Oceanography

      Volume: 72 Issue: 2 Pages: 263-280

    • DOI

      10.1007/s10872-015-0328-y

    • NAID

      40020758346

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Estimating the Eddy Viscosity Profile from Velocity Spirals in the Ekman Boundary Layer2016

    • Author(s)
      Y. Yoshikawa and T. Endoh
    • Journal Title

      Journal of Atmoshpheric and Oceanic Technology

      Volume: 32 Issue: 4 Pages: 793-804

    • DOI

      10.1175/jtech-d-14-00090.1

    • NAID

      120005689180

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Scaling Surface Mixing/Mixed Layer Depth under Stabilizing Buoyancy Flux2015

    • Author(s)
      Yutaka Yoshikawa
    • Journal Title

      Journal of Physical Oceanography

      Volume: 45 Issue: 1 Pages: 247-258

    • DOI

      10.1175/jpo-d-13-0190.1

    • NAID

      120005555500

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Estimates of the turbulent kinetic energy budget in the oceanic convective boundary layer2014

    • Author(s)
      Takahiro Endoh, Takeshi Matsuno, Yutaka Yoshikawa, and Eisuke Tsutsumi
    • Journal Title

      Journal of Oceanography

      Volume: 70 Issue: 1 Pages: 81-90

    • DOI

      10.1007/s10872-013-0215-3

    • NAID

      40019971173

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Presentation] ラングミュア乱流の観測2017

    • Author(s)
      吉川 裕、馬場 康之、水谷 英朗、久保 輝広
    • Organizer
      平成28年度 京都大学防災研究所 研究発表講演会
    • Place of Presentation
      京都大学防災研究所
    • Year and Date
      2017-02-21
    • Related Report
      2016 Annual Research Report
  • [Presentation] 対馬海峡における鉛直混合過程2016

    • Author(s)
      吉川 裕
    • Organizer
      研究集会「宗谷暖流を始めとした対馬暖流系の変動メカニズム」
    • Place of Presentation
      北海道大学低温科学研究所
    • Year and Date
      2016-06-30
    • Related Report
      2016 Annual Research Report
  • [Presentation] 浅海乱流中の懸濁粒子の振る舞いに関する数値実験(その2)2016

    • Author(s)
      吉川 裕
    • Organizer
      研究集会「東シナ海の循環と混合に関する研究」
    • Place of Presentation
      九州大学応用力学研究所
    • Year and Date
      2016-06-11
    • Related Report
      2016 Annual Research Report
  • [Presentation] 熱フラックスの日変化と海面吹送流速の風速依存性2016

    • Author(s)
      井手 喜彦、吉川 裕
    • Organizer
      2016年度日本海洋学会春季大会
    • Place of Presentation
      東京大学本郷キャンパス
    • Year and Date
      2016-03-15
    • Related Report
      2015 Annual Research Report
  • [Presentation] 5ビームADCPを用いた表層乱流構造観測2016

    • Author(s)
      吉川 裕
    • Organizer
      2015年度海洋乱流研究会
    • Place of Presentation
      京都大学吉田キャンパス
    • Year and Date
      2016-01-07
    • Related Report
      2015 Annual Research Report
  • [Presentation] 表層乱流の観測とその生成要因の考察(風か波か?)2015

    • Author(s)
      吉川 裕、馬場 康之、水谷 英明、久保 輝広
    • Organizer
      日本海及び日本周辺海域の海況モニタリングと波浪計測に関する研究集会
    • Place of Presentation
      九州大学春日キャンパス
    • Year and Date
      2015-12-18
    • Related Report
      2015 Annual Research Report
  • [Presentation] 表層境界層における流動構造の観測2015

    • Author(s)
      吉川 裕、油布 圭、鬼塚 剛、馬場 康之、木元 克則
    • Organizer
      2015年度日本海洋学会秋季大会
    • Place of Presentation
      愛媛大学城北キャンパス
    • Year and Date
      2015-09-28
    • Related Report
      2015 Annual Research Report
  • [Presentation] 海面加熱時の混合層深度と風成流のスケーリング則2014

    • Author(s)
      吉川 裕
    • Organizer
      海洋大循環の力学(中深層循環)研究会
    • Place of Presentation
      九州大学
    • Year and Date
      2014-11-01
    • Related Report
      2014 Annual Research Report
  • [Presentation] Competing Roles of Surface Stabilizing Buoyancy Flux and Earth Rotation in Scaling Wind-Driven Mixing2014

    • Author(s)
      Yutaka Yoshikawa
    • Organizer
      2014 Ocean Sciences Meeting
    • Place of Presentation
      Hawaii Convention Center, Honolulu, Hawaii, USA
    • Related Report
      2013 Annual Research Report
  • [Presentation] 海洋表層境界層における水平流動構造観測の試み2014

    • Author(s)
      吉川 裕、油布 圭、鬼塚 剛、紫加田 知幸、木元 克則
    • Organizer
      2013年度 海洋乱流研究会
    • Place of Presentation
      東京大学
    • Related Report
      2013 Annual Research Report
  • [Presentation] Competing Roles of Surface Heating and Earth Rotation in Scaling Wind-Induced Mixing Layer Depth2013

    • Author(s)
      Yutaka Yoshikawa
    • Organizer
      Joint Assembly IAHS-IAPSO-IAPSEI
    • Place of Presentation
      Gothenburg Converntion Center, Gothenburg, Sweden
    • Related Report
      2013 Annual Research Report
  • [Presentation] 乱流混合パラメタリゼーションの現状と課題2013

    • Author(s)
      吉川 裕
    • Organizer
      2013年度日本海洋学会秋季大会シンポジウム
    • Place of Presentation
      北海道大学
    • Related Report
      2013 Annual Research Report
  • [Presentation] 海面加熱時の風成流・風成乱流のスケーリング則2013

    • Author(s)
      吉川 裕
    • Organizer
      2013年度日本海洋学会秋季大会
    • Place of Presentation
      北海道大学
    • Related Report
      2013 Annual Research Report
  • [Presentation] 海洋表層境界層における流動場の水平構造の観測2013

    • Author(s)
      吉川 裕、油布 圭、鬼塚 剛、紫加田 知幸、木元 克則
    • Organizer
      日本海及び日本周辺海域の海況モニタリングと波浪計測に関する研究集会
    • Place of Presentation
      九州大学
    • Related Report
      2013 Annual Research Report

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Published: 2013-05-21   Modified: 2019-07-29  

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