| Project/Area Number |
04452234
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Hydraulic engineering
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| Research Institution | Science University of Tokyo |
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Principal Investigator |
NISHIMURA Tsukasa Science University of Tokyo Department of Science and Technology Associate Professor, 理工学部, 助教授 (40103064)
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| Project Period (FY) |
1992 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 1994: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1993: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1992: ¥2,500,000 (Direct Cost: ¥2,500,000)
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| Keywords | NOAA / AVHRR / daily monitoiring / Sea Mark method / coherent structure / eddy sheddings / interlockings / Shikoku-Basin / Kuroshio meandering / SeaMark追跡法 / NOAA直接受信解析 / 海流乱流場 / 組織的渦構造 / wavelet解析 / 乱流境界層 / 逆カスケード過程 / 黒潮変動 / 海洋乱流場 / NOAA / AVHRR / 衛星データ直接受信 / locking / 離散モード |
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| Research Abstract |
(1) NOAA/AVHRR-based daily monitoring was performed on the hydrodynamics of the coherent structure dominating the oceanic turbulence around Japan-Islands-Chain.
(2) Applying the Sea Mark method, an instantaneous turbulence measurement was realized, that is characterized by 6 hours in sampling time and 3,000km in space scale.
(3) Eddy sheddings from the Giant-Cusps on the Pacific-Coast were described in space, time and frequency domains with NOAA/AVHRR images, instantaneous turbulence fields and the K-U index diagram.
(4) Coherent structure interlocking mechanism inside the closed sea basins was revealed proceeding inside the Kuril-Basin, jaoan-sea, Oyashio-region and the Shikoku-Basin.
(5) Some discrete modes of interlockings inside the Shikoku-Basin were reduced to cause the meandering and nonmeandering of the Kuroshio path.
(6) The results gained in this project were published in a book titled "THE COHERENT STRUCTURE INSIDE THE OCEANIC TURBULENCE AROUND JAPAN-ISLANDS-CHAIN".
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