F313 黒潮と湾流における海洋乱流場の組織的渦構造

概要

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The coherent structure dynamics of oceanic turbulence is discussed comparing the Kuroshio to the Gulf-Stream. A quantitative visualization is realized by an instantaneous turbulence measurements aided by the polar orbiting image sensor NOAA/AVHRR. The oceanic turbulence around Japan-Islands-Chain is daily monitored with directly captured HRPT data. Thermal infrared data are enhanced to visualize the turbulence, and a feature tracking technique is applied to measure the sea surface velocity vector fields. The Gulf-Stream is monitored through the NOAA/Coast Watch www site, and its measurement is performed with the data downloaded from NOAA/Satellite-Active-Archive. It is shown our coastal environments are directly dominated by the coherent structure of mesoscalc eddies. In contrast, that of the US east coast is observed guarded by the shelf sea floor of 100km in width.
日本流体力学会の論文
2000-07-25