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2000 Fiscal Year Final Research Report Summary

Filed measurements of spatial structure and temporal variation of coastal boundary layer in the open coast.

Research Project

Project/Area Number 11650522
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 水工水理学
Research InstitutionTokyo Institute of Technology

Principal Investigator

YAGI Hiroshi  Tokyo Institute of Technology, Graduate school of science and Engineering, Associate Professor, 大学院・理工学研究科, 助教授 (80201820)

Co-Investigator(Kenkyū-buntansha) FUJII Satoshi  Okinawa Radio Observatory Communication, ResearchLaboratory Director, 通信総合研究所・沖縄電波観測所, 所長
HINATA Hirobumi  Tokyo Institute of Technology, Faculty of Engineering, Research Associate, 港湾技術研究所, 主任研究官 (70272680)
SATO Shinji  University of Tokyo Graduate school of Engineering, associate Professor, 大学院・工学系研究科, 助教授 (90170753)
Project Period (FY) 1999 – 2000
KeywordsCoastal boundary layer / Shelf Sea / Kuroshio current / Frontal eddies / Intrusion of Oyashio water / Internal tide / Field observation / Nutrient salts
Research Abstract

In order to understand the effects of meso-scale Kuroshio fluctuation on the coastal current system, field experiments to measure the velocity and water qualities were performed in 1999. The results show that the abrupt approach of Kuroshio current to the Kashima coast induce the strong southward current on the whole coastal region and the Kuroshio-Oyashio mixed water intrudes to the coast from the northern offshore area with the sharp temperature and salinity front. The frontal eddies of Kuroshio current have the other remarkable influence to the coast. The warm water from frontal eddies intrudes to the surface layer of the shelf sea with about 20m of thickness. Moreover spatial distribution and temporal variability of nutrient salt and Cholorophyll-a at the Kashima coast were performed in 2000. The results show that the nutrient field in the costal region is affected by the phosphorus rich water from the offshore bottom layer in spring and summer, while the nitrogen rich surface nearshore water dominates in autumn. The special distribution and its temporal variation of the Chlorophyll -a in the shelf sea region are well correlated to the nutrient variation.

  • Research Products

    (5 results)

All Other

All Publications (5 results)

  • [Publications] 八木宏・身崎成紀・灘岡和夫・中山哲厳・二平章・山下俊彦・福本正: "黒潮流路変動に対する大規模沿岸流れの応答と沿岸水の流出過程について"土木学会海岸工学論文集. 47. 391-395 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 八木宏・Mohd Azhar・日向博文・灘岡和夫・中山哲厳・足立久美子: "大陸棚縁辺海域における非線形内部波の基本特性について"土木学会海岸工学論文集. 47. 396-400 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 日向博文・八木宏・灘岡和夫・斉藤輝彦・田淵博嗣: "夏季東京湾における内部潮汐の基本特性について"土木学会海岸工学論文集. 47. 426-430 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 身崎成紀・八木宏・日向博文・灘岡和夫・中山哲厳: "夏季鹿島灘沿岸域に励起された南下流の特性について"2000年日本海洋学会春季大会要旨集. 153 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 八木宏・身崎成紀・日向博文・灘岡和夫・中山哲厳: "鹿島灘の日周潮流について"2000年日本海洋学会春季大会要旨集. 144 (2000)

    • Description
      「研究成果報告書概要(和文)」より

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Published: 2002-03-26  

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