192lio — Temperatures were low in July with the waters off Kushiro at 

 10 oO C or less 5 but from the latter part of the month they rose abruptly, 

 and in the early part of August the third branch of the warm current showed 

 l8oO°C to 21oO°C„ In the latter part of August the second stream of the 

 cold current strengthened and the temperatures went down to l5oO°C or 

 below, but in the early part of September the water temperatures recoveredo 



1925„— Temperatures were 16„0°C or higher from July on and reached 

 their highest in August, It was a year of high temperatureso At Kushiro 

 the 20-mile station showed the lowest and the 30-mile station the highest 

 readings, 



19260— The surface water temperatures were unusually lowo August 

 showed the maximumo In contrast to this, the middle and lower levels 

 had high temperatures, that is, the vertical distribution of the warm 

 current was thick. The range of the bottom layer of cold water, with 

 temperatures of 2,0°C and lower, was small. At Kushiro the second stream 

 of the Chishima cold current approached to the 20-mile station, and its 

 range extended to the UO-mile station. The third branch of the warm 

 current did not extend east of Kushiro, The water color was unfavorable 

 and the transparency was notably low, 



1927o— This was a yesir of high surface water tenperatures, the maximum 

 being reached in August, and the third branch of the warm current was 

 vigorous, (In August the coastal stream of the cold current was not 

 present on the line south of Kushiro,) The cold bottom water was strong, 

 water of temperatures of 2,0°C or less having a wide range. Consequently 

 the vertical distribution of the warm current was thin, 



1928, —This was a year of high surface temperatures. The peak was 

 in September and the period of falling temperatures was somewhat delayed. 

 The range of the cold bottom water with temperatures of 2,0°C and lower 

 was not great, 



1929 o— This was a year of low surface temperatures. The range of 

 cold bottom water of Z,fJ°C and lower temperatures was extremely small. 

 Accordingly the vertical distribution of the warm current was thick. 

 The third branch of the warm current flourished off Erimosaki, but it 

 was blocked off Kushiro by the cold current (the coastal stream and 

 the second stream did not separate) and did not extend farther east, 



1930, —The surface water temperatures were normal. The lower level 

 was markedly cold and the rar^e of water with temperatures of 2,0°G or 

 less was large. Consequently the vertical distribution of the warm 

 current was thin. On the Erimosaki line the difference in temperature 

 between the surface and kO meters was 11,7°C, the greatest in the past 

 6 years. The value on the Kushiro line was the fourth greatest in the 

 past 8 years. 



17 



