>f North, ?„c,f,c 

 HlQh 



J. 



'893 /yoJ ">ti iQii /93i (943 



Fig. 7. — The secular change of the amount 

 of precipitation during summer 

 season in the central part of Japan 

 proper 



intensities of winter and summer monsoons in the Far East have been 

 increasing in the past fifty years, and that is the cause which has widened 

 the annual range of air temperatures in the most part of Japan as I 

 showed in the preceding paragraph. 



4. The Sun's Activity as a Possible Factor on the Secular Change 



OF Climate 



As above stated, it can fairly be concluded that the changes observ- 

 able in the cHmate of Japan are due to the fact that the monsoons, 

 both in winter and summer, in the Far East are growing active. 

 A. Wagner(5) and others(6) have also referred to the increasing activity 

 of the general circulations of atmosphere in their attempts to explain 

 the trend of climatic change in Europe. Collating all the information 

 available, it is conceivable that the general current of atmosphere over 

 the northern hemisphere has gained in intensity. 



115 



