64 EIGHTH PACIFIC SCIENCE CONGRESS 



The storm tides caused by a heavy typhoon which attacked Japan 

 in September, 1950, were also examined by Masamori Miyazaki in 1951. 

 The storm tide-height amounted to about 125 cm. along the Kyushu 

 coast facing the Inland Sea. 



He also analyzed the data obtained during the passage of the 

 typhoon "Muroto" (1934) and the typhoon "J^'^^" (1950), which went 

 across Osaka Bay, and made some additional explanation of the seiches 

 with periods 310 minutes and 70 minutes which were observed during 

 the passage (KH, 2, 1951). The storm tide caused by the typhoon 

 "Jane" was also discussed by K. Hishida and T. Wakabahashi and was 

 reported to have amounted to a height of 60-70 cm. (KH, 1, 1950, 185). 



A series of dynamical studies was made by S. Unoki during the 

 period 1950-51 on the effect of atmospheric pressure change on the va- 

 riation of sea level. He found that the sea level always responds to the 

 variation of the atmospheric pressure after a lag of time. This lag is 

 found to increase with the period of the atmospheric pressure variation, 

 velocity of travelling surface pressure disturbance and the latitude, and 

 decreases with the depth of the sea. These observed facts were shown 

 to agree with the theory pretty well (OM, 2, 1950, 1-15). He also made 

 an attempt to improve the Colding formula for estimating the eleva- 

 tion of the sea level caused by stationary winds. He studied the effect 

 of the fetch, variation of depth and the gradient of wind velocity on the 

 variation of sea level (OM, 3, 1951, 1-16). He further pointed out 

 that the lag between the wind and the sea level variations is usually 

 small when only the wind direction varies, but the phase-difference is 

 large when the wind force varies, being closely related with the lati- 

 tude, the angle between the wind and coast line, and the rate of varia- 

 tion of wind velocity. But the most important conclusion he obtained 

 is that the elevation of sea surface is considerably larger when the wind 

 direction rotates counter-clockwise than when it does clockwise, even 

 when the absolute value of wind velocity and the rate of variation of 

 wind direction remains the same. This means that larger elevation of 

 the sea surface occurs when a cyclonic storm passes northward across 

 the west side of a bay, than when it passes through the eastern portion 

 (OM, 3, 1951, 53-63). 



In 1952, K. Kajiura made a study of the currents and the accumu- 

 lation of water caused by winds in a lake whose water consists of two 

 layers of different densities. The computed profile of the boundary 

 layer agrees with the observation satisfactorily (JOSJ, 8, 1952, 67-71). 



A series of remarkable papers was published by H. Yamada on the 

 effect of a travelling disturbance on the motion of water in an enclosed 

 or a semi-open sea. After a tedious computation, he could show the 



