Hydrodynamical study of the rotating turbulence dominant in the oceanic currents around Japan-islands-Chain

研究期间取得的成果总结如下。(1)利用直接捕获的NOAA/AVHRR资料，通过高分辨率HRPT模式对日本岛链附近的海洋湍流进行了监测。在此基础上，对海洋湍流的逆级联过程和互锁过程进行了一些现象学研究。(2)应用SeaMark方法对NOAA/HRPT资料进行了瞬时湍流测量，定量描述了湍流现象。(3)将卫星监测的数据和结果存档为增强的卫星图像、海面速度矢量分布图、海面涡度分布图等专题图。(4)通过旋转系统的水动力模型试验和数值试验，在实验室条件下模拟了一些湍流过程，如尖角的涡脱机制、湍流的逆级联过程、海底地形引起的拟序结构的互锁过程等。(5)结果通过互联网以电子方式公开。(6)研究结果发表在题为“日本岛链周围海洋湍流内部的相干结构”的报告中。

The results obtained in the research period are summarized as follows.(1) The oceanic turbulence around Japan-Islands-Chain was monitored by the direct capturing NOAA/AVHRR data through the high resolution HRPT mode. Based on the data, some phenomonology was obtained on the inverse cascade process of oceanic turbulence and on the interlocking process.(2) Applying the SeaMark method to the NOAA/HRPT data, an instantaneous turbulence measurement was conducted to quantitatively describe the turbulence phenomena.(3) The data and resulta obtained by the satellite monitoring were archived as the enhanced satellite images, sea surface velocity vector distribution map, sea surface vorticity distribution map and as the other kinds of thematic maps.(4) By the hydrodynamical model test on a rotating system and by the numerical experiment, some turbulence processes were simulated in the laboratory ; i.e.the eddy shedding mechanism of the cusped capes, the inverse cascade process of turbulence, the interlocking process of the coherent structure due to the seabed topography, etc.(5) The results were opened electronically through the internet.(6) The results were published as the report titled "The Coherent Structure inside the Oceanic Turbulence around Japan-Islands-Chain".