• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Study on the effects of warm eddies induced by the Kuroshioon the physical process of continental shelf region.

Research Project

Project/Area Number 60420014
Research Category

Grant-in-Aid for General Scientific Research (A)

Allocation TypeSingle-year Grants
Research Field 気象・海洋・陸水学
Research InstitutionKyoto University

Principal Investigator

KUNISHI Hideaki  Kyto University,Professor, 理学部, 教授 (40025234)

Co-Investigator(Kenkyū-buntansha) YOSHIOKA Hiroshi  Kyoto University, Instructor, 防災研究所, 助手 (10027287)
NISHI Katuya  Kyoto University, Instructor, 理学部・, 助手 (10027237)
IMASATO Norihisa  Kyoto University, Associate professor, 理学部, 助教授 (40025391)
Project Period (FY) 1985 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥21,500,000 (Direct Cost: ¥21,500,000)
Fiscal Year 1987: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1986: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1985: ¥15,500,000 (Direct Cost: ¥15,500,000)
KeywordsFluctuation of Kuroshio / Continental shelf region / Particle tracking / Eddies / Oceanic front / Discharge of coastal water / Satellite imargery / 数値実験 / 黒潮フロントと渦 / 暖水塊の東進現象 / フェリーによる連続計測 / 衛星画像の時系列解析 / 暖水塊 / 水温・塩分 / フロント構造の伝播 / 黒潮流路の変動 / 淡水流出量 / 土佐湾 / 紀伊水道
Research Abstract

Water motion in the continental shelf region induced by the fluctuation of the Kuroshio was studied by means of satellite picture analysis and numerical experiments. We calculated trajectories of a large number of labeled particles moving in velocity field produced by fluctuating Kuroshio in a numerical barotropic model. When the Kuroshio Flows near the Cape Ashizuri, a large counter-clockwise eddy is produced in the Tosa Bay and particles of the Kuroshio water flow away along the current axis, As it moves offshore form the Cape Ashizuri, those are trapped by the eddy and approach to the coast accompaning with a thermal front. These features in the numerical model were detected in NOAA AVHRR pictures.
When and eddy appeares in the Kii-Channel approach, the coastal front in the channel becomes sharper and fluctuates to make a water exchange across the front, These phenomena depend on the density difference of two water masses bounded by the front.
Another numerical experiment shows that a pair of eddies is produced by a baroclinic instability of the density front between coastal and oceanic waters on the shelf region, These eddies transport oceanic water toward the coast and coastal water toward the offshore direction across the shear flow such as the Kuroshio, This is the reason why a large parch of low-salinity water mass has been often found in the surface layer of the Kuroshio in summer season (IMASATO and QIU, 1987),

Report

(3 results)
  • 1987 Final Research Report Summary
  • 1986 Annual Research Report
  • 1985 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] Akitomo, Kazunori: Proceedings of International Symposium of Physics of Shallow Bays, Estuarine and Continental Shelves.(1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Akitomo, Kazunori: Journal of Physical Oceanography.17. (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Akitomo, Kazunori: Journal of Oceanographical Society of Japan.43. (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Akitomo, Kazunori: Journal of Oceanographical Society of Japan.44. (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Awaji, Toshiyuki: Journal of Physical Oceanography. 18. (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Amasato, Norihisa: Journal of Physical Oceanography. 17(7). 953-968 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Toda, Takashi: Sora to Umi. 10. (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Qiu, Bo: Journal of Geophysical Research. 93. (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Akitomo, Kazunori: "Numerical model of the generation of a shallow sea front." Proceedings of International Symposium on Physics of Shallow Bays, Estuarine and Continental Shelves.(1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Akitomo, Kazunori: "A numerical study of frontgenesis in a shallow sea." Journal of Physical Oceanography.17. (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Akitomo, Kazunori: "A numerical study of a shallow sea front generated by the bouyancy flux; Water exchange caused by fluctuations of the front." Journal of Oceanographical Society of Japan. 43. (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Akitomo, Kazunori: "Water exchange produced by fluctuations of coastal front caused by intrusion of warm water masses from the open ocean." Journal of Oceanographical Society of Japan.44. (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Awaji, Toshiyuki: "A numerical study of shelf-water motion caused by the Kuroshio." Journal of Physical Oceanography.18. (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Imasato, Norihisa: "An event in water exchange between continental shelf and the Kuroshio off southern Japan; Lagrangian tracking of a low-salinity water mass on the Kuroshio." Journal of Physical Oceanography.17 (7). (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Toda, Takashi: "Time series analysis of oceanic front using satellite imagery: Methods and examples." Sora to Umi.10. (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Qiu, Bo: "Baroclinic instability of bouyancy-driven coastal denisty currents." Journal of Geophysical Research.93. (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] IMASATO,NORIHISA: JOURANL OF PHYSICAL OCEANOGRAPHY. 17(6). (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] QIU,BO: JOURNAL OF GEOPHYSICAL RESEARCH. 92. (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] 戸田孝: 1986年度日本海洋学会秋季大会講演要旨集. 219-220 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 淡路敏之: 1986年度日本海洋学会秋季大会講演要旨集. 65-66 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 秋友和典: 1987年度日本海洋学会春季大会講演要旨集. (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] 戸田孝: 1987年度日本海洋学会春季大会講演要旨集. (1987)

    • Related Report
      1986 Annual Research Report

URL: 

Published: 1987-03-31   Modified: 2017-04-05  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi