Seven-year (2005–2011) Synthetic Aperture Radar (SAR) images are applied to study oceanic eddies in the East China Sea. It is found that most of these eddies detected from the SAR images are less than 10 km, which are submesoscale eddies. Seasonal differences are evident in the distribution of eddies, with the highest and the lowest number of eddies noted in summer and winter, respectively. Since slick streaks in SAR images look dark, an eddy identified due to the slicks is referred to as “black eddy”. As a result of wave-current interactions in the zones of current shear, it can be seen that an eddy exhibits a bright curve, the eddy is called “white eddy”. During the seven years, 95 black eddies and 50 white eddies are identified in the study area. Black eddies are found in the whole study area while white eddies are mainly distributed in the vicinity of the Kuroshio Current. This study suggests that the distribution of the white eddy is denser around the Kuroshio because of the strong shear in the Kuroshio region. In terms of the eddy sizes, white eddies are generally smaller than black eddies.

七年（2005-2011年）合成孔径雷达（SAR）图像用于研究东海的海洋涡流。结果发现，从SAR图像中检测到的大多数涡流均小于10 km，属于亚中尺度涡流。涡流的分布存在明显的季节性差异，涡流分布的夏季和冬季分别为最高和最低。由于SAR图像中的浮油条纹看起来很暗，因此将因浮油而识别出的涡流称为“黑涡流”。由于在电流剪切区域中的波流相互作用，可以看出涡流呈现出明亮的曲线，该涡流被称为“白色涡流”。在这七年中，研究区域内发现了95个黑色涡流和50个白色涡流。在整个研究区域内发现黑色涡流，而白色涡流主要分布在黑潮洋流附近。这项研究表明，由于黑潮地区的强烈剪切作用，白涡的分布在黑潮周围更为密集。就涡流大小而言，白色涡流通常小于黑色涡流。