266 



MALKtJS 



Table XXIV 



[chap. 4 



Summary of Oceanic Heat Budget for Japan Sea in Winter 

 (after Manabe and Miyazaki) 



Unit : cal/cm2 per day 



R 



Qt 



10 



102 



768 



880 



This leads to a rapid transformation of the continental air-masses, which begin 

 to acquire maritime characteristics in a day or less ; the time of travel across 

 the Japan Sea was about 24 h. 



It is not coincidental that this area (see Fig. 82) and the corresponding region 

 off the American Coast are favored for the formation and deepening of wave 

 cyclones upon the cold fronts which so frequently become stalled there. A clue 



105° 



(a) 



115" 120° 125° 130° 135° 140° 145° 



Fig. 82. Figure demonstrating the propensity for extra-tropical cyclones to form in the 



(a) Geographical frequency. The value of an isopleth at any point represents the 

 number of (identifiable) cyclones that formed within a radius of 2.5 degrees latitude 

 from that point in the months October through April, 1932-37. 



