黑潮及琉球群岛以东的东北向海流（以下简称琉球海流）都是北太平洋西边界流，特别是黑潮，它与大西洋湾流齐名为世界瞩目的两支强流，具有流速强、流量大、高温及高盐等特点我国对黑潮及琉球群岛以东海流的调查研究开始于２０世纪８０年代中期，例如在１９８６－１９９２年进 The Kuroshio and northeastern currents to the east of the Ryukyu Islands (hereinafter referred to as the Ryukyu currents) are both the western Pacific border currents, especially the Kuroshio current, which are regarded as two strong currents attracting worldwide attention by the Gulf Stream. They have the characteristics of strong flow velocity, large flow rate , High temperature and high salinity and other characteristics of China’s Kuroshio and the Ryukyu Islands to the east of the flow of the survey began in the mid-1980s, for example in 1986-1992