Abstract: Using the World Ocean Atlas 2005 by the National Oceanic and Atmospheric (NOAA) published in 2007, topography database in 2006 by the National Geophysical Data Center (NGDC), and the grid precipitation data of the Asian region by the Japan Agency for Marine-Earth Science and Technology ( JAMSTEC) published in 2003, the authors explore three-dimensional techniques for oceanic data analysis and figures manifestation with Matlab computer programs. They find that the surface salinity distribution of the Kuroshio in the East China Sea (ECS) varies monthly. First, the salinity at surface is higher in December through March, and is lower in June to September; the salinity in the rest of year is in between. Second, the salinity is the highest near the east side of the Kuroshio in the East China Sea where is closer to Ryukyu Island . The salinity at surface is affected by surface temperature, rain, and Changjiang diluted water. The salinity at surface of the Kuroshio in the East China Sea is mainly influenced by surface temperature near the shelf of contentious in November to February. Surface salinity is impacted by precipitation at small-scale in January and summer, which is in areas south of 25癗 and also near 30癗 where the ECS-Kuroshio flows into the Tokara Strait. Summer runoff of Changjiang diluted water affects most to the surface salinity of the Kushiro in a fan-shaped zone, resulting the maximum runoff in July and the corresponding minimum salinity on surface of the Kuroshio in the fan-shaped zone in the East China Sea .

Key words: Kuroshio in the East China Sea , salinity, temperature, precipitation, Changjiang diluted water