抄録
In this paper, the writers discussed the effects of the oceanographic conditions to the yearly mean sea level along the Pacific coast in the south-western part of Japan. As the elements of the oceanographic conditions, the mean water temperature from sea surface to 200 meters depth and the situation of the axis of Kuroshio-current were considered. In order to correct these effects to the yearly mean sea level, the relations between the sea level and these oceanographic conditions were investigated. The main conclusions resulted from above investigations are as follows. (1) The greater part of the fluctuation of sea level is due to the effect of the variation of sea water temperature. Particularly this effect is conspicuous at Aburatsubo and Mera. (2) The variation of the situation of the current-axis is also an element that fluctuates largely the sea level. The fluctuations of sea levels at Nagoya, Shimizu-minato, Aburatsubo, and Mera seem to be affected by the latitude of the most southern part of the current-axis of Kuroshio on the offing Enshu-nada. On the other hand, the fluctuations of sea level at Kushimoto and Kochi seem to relate with the longitude of the current-axis. These facts may be caused by the fluctuations of water temperature in the sea near the tidal station and of the current along the coast which are due to the variation of meandering Kuroshio-current. (3) The fluctuations of the yearly mean sea levels at the tidal stations may contain the effects of the sea water temperature and of the situation of the current-axis. At the tidal stations, Mera, Aburatsubo, Shimizu-minato, Nagoya and Kushimoto, these effects amount to about 70 percents of the fluctuations of yearly mean sea levels, and the standard deviations of the yearly mean sea levels from the linear variations are reduced about 10 millimeters.
