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Global mapping of diapycnal mixing rates in the deep ocean for accurate modeling of the oceanic general circulation

Research Project

Project/Area Number 09640520
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Meteorology/Physical oceanography/Hydrology
Research InstitutionThe University of Tokyo

Principal Investigator

HIBIYA Toshiyuki  The University of Tokyo, Graduate School of Science, Associate Professor, 大学院・理学系研究科, 助教授 (80192714)

Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1998: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1997: ¥1,400,000 (Direct Cost: ¥1,400,000)
Keywordsinternal wave spectrum / energy cascade / nonlinear wave interactions / diapycnal diffusivity / ocean general circulation model / parameterization / near-inertial internal waves / midlatitude storms / 内部波スペクトル / 非線形干渉 / 乱波拡散 / 近慣性流 / 倍慣性周波数 / 中・深層
Research Abstract

By using three-dimensional numerical models, the distribution of internal wave energy for diapycnalmixing in the deep waters of the North Pacific has been examined. During winter, energetic near-inertial waves are excited in response to the midlatitude storms in the western-central North Pacific (30゚N-45゚N). Thus excited waves propagate southward down to 10゚N-15゚N where the frequencies become double the local inertial frequencies so that large amount of wave energy cascades down to dissipation scales via Parametric Subharmonic Instability mechanism. The low-vertical-wavenumber double-inertial frequency internal waves are, in contrast, very weak at the times and locations of the previous microscale measurements so that the observed diapycnal diffusivity of-0.1 cm^2s^<-1> might not be representative.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (32 results)

All Other

All Publications (32 results)

  • [Publications] Niwa, Y., and T.Hibiya: "Response of the deep ocean internal wave field to traveling midlatitude storms as observed in long term current measurements" Journal of Geophysical Research. 104. In press (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hibiya, T., Y.Niwa, and K.Fujiwara: "Numerical experiments of nonlinear energy transfer within the oceanic internal wave spectrum" Journal of Geophysical Research. 103・C9. 18715-18722 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hibiya, T., M.Ogasawara and Y.Niwa: "A numerical study of the fortnightly modulation of basin-ocean water exchange across a tidal mixing zone" Journal of Physical Oceanography. 28・6. 1224-1235 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Niwa, Y., and T.Hibiya: "Nonlinear processes of energy transfer from traveling hurricanes to the deep ocean internal wave field" Journal of Geophysical Research. 102・C6. 12469-12477 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Takeuchi, K., and T.Hibiya: "Numerical simulation of baroclinic tidal currents in Suruga Bay and Uchiura Bay using a high resolution level model" Journal of Oceanography. 53・6. 539-552 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Matsuno T., T.Hibiya, S.Kanari, and C.Kobayashi: "Small scale internal waves and turbulent fluctuations near the continental shelf break in the East China Sea" Journal of Oceanography. 53・3. 259-269 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hibiya, T.: "Generation of internal waves by strong tidal flow over a continental shelf slope" Proceedings of the JSPS-VCC Joint Seminar on Marine Science, ed.by Mohd.Zaki Mohd.Said, Univ.Pertanian Malaysia. Malaysia. 51-64 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Matsuno T., S.Yanao, S.Kanari, T.Hibiya, and C.Kobayashi: "Vertical mixing near the continental shelf break in the East China Sea and intrusion of shelf water into the Kuroshio" Proceedings of the JSPS-VCC Joint Seminar on Marine Science, ed.by Mohd.Zaki Mohd.Said, Univ.Pertanian Malaysia. Malaysia. 5-14 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Niwa, Y., and T.Hibiya: "Response of the deep ocean internal wave field to traveling midlatitude storms as observed in long term current measurements" Journal of Geophysical Research. 104 (in press). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hibiya, T., Y.Niwa, and K.Fujiwara: "Numerical experiments of nonlinear energy transfer within the oceanic internal wave spectrum" Journal of Geophysical Research. 103・C9. 18715-18722 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hibiya, T., M.Ogasawara, and Y.Niwa: "A numerical study of the fortnightly modulation of basin-ocean water exchange across a tidal mixing zone" Journal of Physical Oceanography. 28・6. 1224-1235 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Niwa, Y., and T.Hibiya: "Nonlinear processes of energy transfer from traveling hurricanes to the deep ocean internal wave field" Journal of Geophysical Research. 102・C6. 12469-12477 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Takeuchi, K., and T.Hibiya: "Numerical simulation of baroclinic tidal currents in Suruga Bay and Uchiura Bay using a high resolution level model" Journal of Oceanography. 53・6. 539-552 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Matsuno T., T.Hibiya, S.Kanari, and C.Kobayashi: "Small scale internal waves and turbulent fluctuations near the continental shelf break in the East China Sea" Journal of Oceanography. 53・3. 259-269 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hibiya, T.: "Generation of internal waves by strong tidal flow over a continental shelf slope" Proceedings of the JSPS-VCC Joint Seminar on Marine Science, ed.by Mohd.Zaki Mohd.Said, Univ.Pertanian Malaysia, Malaysia. 51-64 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Matsuno T., S.Yanao, S.Kanari, T.Hibiya, and C.Kobayashi: "Vertical mixing near the continental shelf break in the East China Sea and intrusion of shelf water into the Kuroshio" Proceedings of the JSPS-VCC Joint Seminar on Marine Science, ed.by Mohd.Zaki Mohd.Said, Univ.Pertanian Malaysia, Malaysia. 5-14 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Niwa,Y.,and T.Hibiya: "Response of the deep ocean internal wave field to traveling midlatitude storms as observed in long term current measurements" Journal of Geophysical Research. 104. In press (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Hibiya,T.,Y.Niwa,and K.Fujiwara: "Numerical experiments of nonlinear energy transfer within the oceanic internal wave spectrum" Journal of Geophysical Research. 103・C9. 18715-18722 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Hibiya,T.,M.Ogasawara and Y.Niwa: "A numerical study of the fortnightly modulation of basin-ocean water axchange across a tidal mixiting zone" Journal of Physical Oceanography. 28・6. 1224-1235 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Niwa,Y.,and T.Hibiya: "Nonlinear processes of energy transfer from traveling hurricanes to the deep ocean internal wave field" Journal of Geophysical Research. 102・C6. 12469-12477 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Takeuchi,K.,and T.Hibiya: "Numerical simulation of baroclinic tidal currents in Suruga Bay and Uchiura Bay using a high resolution level model" Journal of Oceanography. 53・6. 539-552 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Matsuno,T.,T.Hibiya,S.Kanari and C.Kobayashi: "Small scale internal waves and turbulent fluctuations near the continental shelf break in the East China Sea" Journal of Oceanography. 53・3. 259-269 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Hibiya,T.: "Proceedings of the JSPS-VCC Joint Seminar on Marine Science,ed.by Mohd.Zaki Mohd.Said,Univ.Pertanian Malaysia,Malaysia" Generation of internal waves by strong tidal flow over a continental shelf slope, 51-64 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Matsuno T.,S.Yanao,S.Kanari,T.Hibiya,and C.Kobayashi: "Proceedings of the JSPS-VCC Joint Seminar on Marine Science,ed.by Mohd.Zaki Mohd.Said,Univ.Pertanian Malaysia,Malaysia" Vertical mixing near the continental shelf break in the East China Sea and intrusion of shelf water into the Kuroshio, 5-14 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Hibiya,T., M.Ogasawara, and Y.Niwq: "A Numerical Study of the Fortnightly Modulation of Basin-Ocean Water Exchange Across a Tidal Mixing Zone" Journal of Physical Oceanography. 28・4. in press (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Hibiya,T., Y.Niwa, and K.Fujiwara: "Numerical Experiments of Nonlinear Energy Transfer Within the Oceanic Internal Wave Spectrum" Journal of Geophysical Research. 103. in press (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Niwa,Y., and T.Hibiya: "Nonlinear Processes of Energy Transfer from Traveling Hurricanes to the Deep Ocean Internal Wave Field" Journal of Geophysical Research. 102・C6. 12469-12477 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Takeuchi,K., and T.Hibiya: "Numerical Simulation of Baroclinic Tidal Currents in Suruga Bay and Uchiura Bay Using a High Resolution Level Model" Journal of Oceanography. 53・6. 539-552 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Matsuno T., T.Hibiya, S.Kanari, and C.Kobayashi: "Small Scale Internal Waves and Turbulent Fluctuations Near the Continental Shelf Break in the East China Sea" Journal of Oceanography. 53・3. 259-269 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Hibiya,T.: "Generation of Internal Waves by Strong Tidal Flow Over a Continental Shelf Slope" Proceedings of the JSPS-VCC Joint Seminar on Marine Science ed.by Mohd.Zaki Mohd.Said,Univ.Pertanian Malaysia,Malaysia. 51-64 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Matsuno,T., S.Kanari, T.Hibiya, C.Kobayashi and S.Yanao: "Vertical Mixing Near the Continental Shelf Break in the East China Sea and Intrusion of Shelf Water into the Kuroshio" Proceedings of the JSPS-VCC Joint Seminar on Marine Science ed.by Mohd.Zaki Mohd.Saied,Univ.Pertanian Malaysia,Malaysia. 5-14 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 日比谷 紀之、丹羽 淑博、中島 健介、杉ノ原 伸夫: "海洋内部波の非線形相互作用による乱流スケールへのエネルギーカスケードアップ過程の数値実験" 気候システム研究センター、気候システム研究業書、No.2「気候研究の最前線」. 79-89 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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