大氣下層の細胞高氣大壓圧によるMosaic構造に就いて
1949 年 27 巻 5 号 p. 145-158
詳細
1949 年 27 巻 5 号 p. 145-158
As a theory _??_iscussing the structure of the lower atmosphere there is J. Bjerknes' Oell Theory. According to this theory the subtropical belt of high pressure is divided into separate anticyclones, or cells, and the longest axis of a subtropical cell is of the order of 4000 to 9000km. But, in practice the anticyclones which appear in our synoptic charts covering the region in which the growth and invasion of the typhoons take place are sometimes by far the smaller than the Bjerknes' cell and their dimensions are of the order of 1000km or less.
To explain this fact, we propose a theory alike to the mosaic structure theory due to Dr. S. Fujiwhara. Its principal conception is that the lower atmosphere is divided into cellular anticyclones of the order mentioned above and each cell is comparatively stationary. If we admit this mosaic theory, the growth and movement of typhoons are much more clearly explained. For intance, the growth of typhoons which originate in the vicinity of latitude 22°N are difficult to be explained merely by the equatorial front, for in such cases the equatorial front is clearly traced near 10°N. The typhoons in such cases are originated on the front which runs nearly parallel to the latitude of 22°N (tentatively named tropical front) and the existence of this front can rationally be shown merely by admitting the mosaic structure theory.
