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Mechanism of clockwise circulations in the southern Sea of Okhotsk

Research Project

Project/Area Number 17540406
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Meteorology/Physical oceanography/Hydrology
Research InstitutionHokkaido University

Principal Investigator

MITSUDERA H.  Hokkaido University, Inst. Low Temp. Sci., Professor (20360943)

Co-Investigator(Kenkyū-buntansha) OSHIMA Keiichiro  Hokkaido University, Inst. Low Temp. Sci., Asso. Prof. (30185251)
NAKAMURA T.  Hokkaido University, Inst. Low Temp. Sci., Lecturer (60400008)
ONO K.  Hokkaido University, Inst. Low Temp. Sci., Technical Staff (40396320)
NISHIGAKI H.  Oita University, Faculty Edu. Wel Sci., Lecturer (70253763)
内本 圭亮  北海道大学, 低温科学研究所, 非常勤研究員 (10374646)
Project Period (FY) 2005 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2006: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 2005: ¥1,800,000 (Direct Cost: ¥1,800,000)
KeywordsThe Sea of Okhotsk / The Kuril Islands / tidal mixing / North Pacific Intermediate Water / clockwise circulation / thermohaline circulation / East Sakhalin Current / Soya Warm Current / 中規模渦 / 多重平衡
Research Abstract

Clockwise circulations are dominant in the Kuril Basin, the southern portion of the Sea of Okhotsk. Correspondingly, potential vorticity (PV) in the intermediate layer is low in this region. In this project, formation processes of the clockwise circulation were investigated.
First, effects of localized mixing around the Kuril Islands were considered. A two-layer model with a submarine ridge was used, and mixing is parameterized as diapycnal vertical velocity over the ridge topography. When the mixing commences, the interface deepens over the ridge locally. For weak mixing cases, the depth of the interface corresponds well to a linear beta-plume solution. If the mixing becomes stronger, low PV water forms first over the ridge. Then, the low PV water is carried westward by eddies and waves, letting low PV water occupy the entire region west of the ridge. It is noted that the lower layer flow around the ridge gives significant influences on the circulation through modifying characteristics … More of the upper-layer wave. In particular, if the characteristics have closed contours, then PV input due to vertical velocity is hardly radiated from the topographic region until the interface becomes so deep that baroclinic instability can take place. Bimodal states in the clockwise circulation are found.
Second, a high resolution Okhotsk Sea Model, with a 1/12 degree horizontal resolution, was used to investigate wind-driven circulation. The clockwise circulation in the Kuril Basin is formed as a recirculation gyre associated with an eastward jet that extends from the East Sakhalin Current. Both the numerical results and the altimeter data from satellites indicate that this circulation has an annual signal corresponding to the annual variations in wind-stress.
From these experiments, it has been found that the clockwise circulation in the Sea of Okhotsk has rich structures incorporating both wind-driven and thernmohaline components. An analytical model that investigates impacts on the intermediate layer circulation was also constructed. Further, analysis of data from the intensive CTD survey across the Bussol' Strait were carried out to estimate the vertical mixing strength along the Kuril Islands. Less

Report

(3 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • Research Products

    (43 results)

All 2008 2007 2006 2005

All Journal Article (43 results)

  • [Journal Article] 千島海盆東部の海面高度の年周期変動2008

    • Author(s)
      内本圭亮
    • Journal Title

      海と空 (印刷中)

    • NAID

      10024445625

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Numerical Study of Ice-Drift Divergence by a Cyclonic Wind with a Lagrangian ice model2008

    • Author(s)
      Kawaguchi, Yuusuke
    • Journal Title

      Tellus A (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Study of Ice-Drift Divergence by a Cyclonic Wind with a Lagrangian ice model2008

    • Author(s)
      Kawaguchi, Y. and H. Mitsudera, Numerical
    • Journal Title

      Tellus A (In press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Annual variability in altimeter in the eastern Kuril Basin2008

    • Author(s)
      Uchimoto, K. H. Mitsudera, N. Ebuchi, and G. Mizuta
    • Journal Title

      Umi to Sora (In press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Anticyclonic eddy caused by the Soya Warm Current in an Okhotsk OGCM2007

    • Author(s)
      Uchimoto, Keisuke
    • Journal Title

      Journal of Oceanography 63

      Pages: 379-391

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Water mass exchange and diapycnal mixing at Bussol' Straitrevealed by water mass properties2007

    • Author(s)
      Ono, Kazuya
    • Journal Title

      Journal of Oceanography 63

      Pages: 281-291

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Iron supply to the western subarctic Pacific: Importance of iron export from the sea of Okhotsk2007

    • Author(s)
      Nishioka, Jun
    • Journal Title

      Journal of Geophysical Research 112

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Formation regions of Subantarctic Mode Water detected by OFES and Argo profiling floats2007

    • Author(s)
      Aoki, Shigeru
    • Journal Title

      Geophysical Research Letters 112

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] A series of cyclonic eddies in the Antarctic Divergence off Adelie Coast2007

    • Author(s)
      Aoki, Shigeru
    • Journal Title

      Journal of Geophysical Research 112

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] オホーツク海および北太平洋西部亜寒帯循環とそのモデリング2007

    • Author(s)
      三寺 史夫
    • Journal Title

      低温科学 65

      Pages: 139-148

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 環オホーツク圏領域気候モデル構築に向けて2007

    • Author(s)
      中村 知裕
    • Journal Title

      低温科学 65

      Pages: 123-130

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Numerical Study of Ice-Drift Divergence by a Cyclonic Wind with a Lagrangian ice model2007

    • Author(s)
      Kawaguchi, Yuusuke
    • Journal Title

      POAC conference proceedings, 2

      Pages: 660-665

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Anticyclonic eddy caused by the Soya Warm Current in an Okhotsk OGCM2007

    • Author(s)
      Uchimoto, K. H. Mitsudera, N. Ebuchi and Y. Miyazawa
    • Journal Title

      J. Oceanogr 63

      Pages: 379-391

    • NAID

      10019934328

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Water mass exchange and diapycnal mixing at Bussol' Strait revealed by water mass pronerties.2007

    • Author(s)
      Ono, K. K.-I. Ohshima, T. Kono, M. Itoh, K. Katsumata, Y. Volkov, and M. Wakatsuchi
    • Journal Title

      J. Oceanogr 63

      Pages: 281-291

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Iron supply to the western subarctic Pacific: Importance of iron export from the sea of Okhotsk.2007

    • Author(s)
      Nishioka J. T. Ono, H. Saito, T. Nakatsuka, S. Takeda, T. Yoshimura, K. Suzuki, K. Kuma, S. Nakabayashi, D. Tsumune, H. Mitsudera, A. Tsuda, and W.K. Johnson
    • Journal Title

      J. Geophys. Res

    • NAID

      120000949904

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 2007: Formation regions of Subantarctic Mode Water detected by OFES and Argo profiling floats2007

    • Author(s)
      Aoki, S. M. Hariyama, H. Mitsudera, H. Sasaki, Y. Sasai
    • Journal Title

      Geophys. Res. Lett 34

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] A series of cyclonic eddies in the Antarctic Divergence off Adelie Coast2007

    • Author(s)
      Aoki, S. D. Fukai, T. Hirowake, S. Ushio, S. R. Rintoul, H. Sasumoto, T. Ishimaru, H. Sasaki, T. Kagimoto, Y. Sasai, and H. Mitsudera
    • Journal Title

      J. Geophys. Res. 112

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Modeling of the Sea of Okhotsk and the western North Pacific2007

    • Author(s)
      Mitsudera, H. and T. Nakamura
    • Journal Title

      Low Temperature Science 65

      Pages: 139-148

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Toward development of the Pan-Okhotsk Regional Model2007

    • Author(s)
      Nakamura, T. and H. Mitsudera
    • Journal Title

      Low Temperature Science 65

      Pages: 123-130

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 2007: A Numerical Study of Ice-Drift Divergence by a Cyclonic Wind2007

    • Author(s)
      Kawaguchi and H. Mitsudera
    • Journal Title

      POAC conference proceedings 2

      Pages: 660-665

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Anticyclonic eddy caused by the Soya Warm Current in an Okhotsk OGCM2007

    • Author(s)
      Uchimoto, K.
    • Journal Title

      Journal of Oceanography 63

      Pages: 379-391

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Blocking of the Kuroshio large meander by baroclinic interaction with the Izu Ridge2006

    • Author(s)
      Mitsudera, H.
    • Journal Title

      Journal of Physical Oceanography 36

      Pages: 2042-2059

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Three subtropical fronts in the North Pscific: Observational evidence for mode water-induced subsurface frontogenesis2006

    • Author(s)
      Kobashi, Fumiaki
    • Journal Title

      Journal of Geophysical Research 111

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Observations of the Subtropical Mode Water evolution from the Kuroshio Extension System Study.2006

    • Author(s)
      Qiu, Bo
    • Journal Title

      Journal of Physical Oceanography 36

      Pages: 457-473

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 海嶺上の混合による時計回り循環形成のメカニズム.2006

    • Author(s)
      三寺 史夫
    • Journal Title

      研究集会報告 地球流体における波動と対流現象の力学

      Pages: 89-98

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Blocking of the Kuroshio large meander by baroclinic interaction with the Izu Ridge.2006

    • Author(s)
      Mitsudera, H. B. Taguchi, T. Waseda, and Y. Yoshikawa
    • Journal Title

      J. Phys Oceanogr 36

      Pages: 2042-2059

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Three subtropical fronts in the North Pscific: Observational evidence for mode water-induced subsurface frontogenesis2006

    • Author(s)
      Kobashi, F. H. Mitsudera, and S.P. Xie
    • Journal Title

      J. Geophys. Res. 111

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 2006: Observations of the Subtropical Mode Water evolution from the Kuroshio Extension System Study2006

    • Author(s)
      Qiu, B. P. Hacker, S. Chen, K.A. Donohue, D.R. Watts, H. Mitsudera, N.G. Hogg and S.R. Jayne
    • Journal Title

      J. Phys. Oceanogr 36

      Pages: 457-473

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Mechanisms of a clockwise circulation due to enhanced mixing over the ridge2006

    • Author(s)
      Mitsudera, H. T. Nakamura and H. Nishigaki
    • Journal Title

      Workshop proceeding on "Mechanics of waves and convection in geophysical fluids"

      Pages: 89-98

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Blocking of the Kuroshio large meander by baroclinic interaction with the Izu Ridge.2006

    • Author(s)
      Mitsudera, Humio
    • Journal Title

      Journal of Physical Oceanography 36

      Pages: 2042-2059

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Three subtropical fronts in the North Pscific : Observational evidence for mode water-induced subsurface frontogenesis.2006

    • Author(s)
      Kobashi, F.
    • Journal Title

      J. Geophys. Res. 111

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Observations of the Subtropical Mode Water evolution from the Kuroshio Extension System Study2006

    • Author(s)
      Qiu, B.
    • Journal Title

      J. Phys. Oceanogr. 36

      Pages: 457-473

    • Related Report
      2006 Annual Research Report
  • [Journal Article] 海嶺上の混合による時計回り循環形成のメカニズム2006

    • Author(s)
      三寺 史夫
    • Journal Title

      九州大学応用力学研究所研究集会報告 17ME-S4

      Pages: 89-98

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Blocking of the Kuroshio large meander by baroclinic interaction with the Izu Ridge.2006

    • Author(s)
      Mitsudera, Humio
    • Journal Title

      Journal of Physical Oceanography (印刷中)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Response of the Kuroshio Extension to Rossby waves associated with the 1970s climate regime sift in a high-resolution ocean model2005

    • Author(s)
      Taguchi, Bunmei
    • Journal Title

      Journal of Climate 18

      Pages: 2979-2995

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Equatorial Pacific Subsurface Countercurrents in a high-resolution OGCM2005

    • Author(s)
      Ishida, Akio
    • Journal Title

      Journal of Geophysical Research 110

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Dynamics and thermodynamics of the Indian Ocean Warm Pool in a high-resolution global general circulation model2005

    • Author(s)
      Kumar, Prasana
    • Journal Title

      Deep Sea Research Part II 52

      Pages: 2031-2047

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Response of the Kuroshio Extension to Rossby waves associated with the 1970s climate regime shift in a high-resolution ocean model2005

    • Author(s)
      Taguchi, B. S-P. Xie, H. Mitsudera, A. Kubokawa
    • Journal Title

      J. Climate 18

      Pages: 2979-2995

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Equatorial Pacific Subsurface Countercurrents in a high -resolution OGCM2005

    • Author(s)
      Ishida, A. H. Mitsudera, Y. Kashino, T. Kadokura
    • Journal Title

      J. Geophys. Res 110

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 2005: Dynamics and thermodynamics of the Indian Ocean Warm Pool in a high-resolution global general circulation model.2005

    • Author(s)
      Kumar, P. A. Ishida, K. Yoneyama, M.R. Ramesh Kumar, Y. Kashino, H. Mitsudera
    • Journal Title

      Deep Sea Res. Rart II 52

      Pages: 2031-2047

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Response of the Kuroshio Extension to Rossby waves associated with the 1970s climate regime shift in a high-resolution ocean model.2005

    • Author(s)
      Taguchi, Bunmei
    • Journal Title

      Journal of Climate 18

      Pages: 2979-2995

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 2005. Equatorial Pacific Subsurface Countercurrents in a high-resolution OGCM2005

    • Author(s)
      Ishida, Akio
    • Journal Title

      Journal of Geophysical Research 110

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Dynamics and thermodynamics of the Indian Ocean Warm Pool in a high-resolution global general circulation model.2005

    • Author(s)
      Kumar, Presanna
    • Journal Title

      Deep Sea Research, Part II 52

      Pages: 2031-2047

    • Related Report
      2005 Annual Research Report

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Published: 2005-04-01   Modified: 2016-04-21  

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