1989年6月131°E線上30°Nから15°Nまでの海流

The CTD observations were carried out along 131°E from 30°N to 15°N in the Northwestern Pacific from the 10th to 14th of June, 1989. Vertical sections of water temperature, salinity and dynamic height along 131°E were described, and some representative temperature-salinity relations were drawn from CTD records. The condition of temperature distribution section was related to the existence of the zonal currents. These currents along section from the north to the south were the Kuroshio, the Kuroshio Countercurrent, the Subtropical Countercurrent, the northern part of the North Equatorial Current and the easterly current near 18°N. Numerous small step-like and inversion features were existed in the temperature-salinity relations above 15°C, which showed the existence of surface water mixing