Low Salinity Water Intruded into the Kuroshio around the Shelf Break in the East China Sea

Two kinds of salinity minimum waters are detected from the data along PN section by Nagasaki Marine Observatory and those obtained just around the shelf break by the training vessels of Nagasaki University in the frontal area of the Kuroshio in the East China Sea. One of the salinity minimum is detected in surface layer, which would be subducted from the surface along the Kuroshio front. The sigma-t value of the salinity minimum is usually revealed from 23 to 24, and the subduction layer is slightly inclined against the isopycnals. The other one is detected in deeper layer around 200m with sigma-t value from 24 to 25. This deeper salinity minimum has a density similar to that observed in the bottom layer on the shelf