On the Amalgamationl of Cyclones

[摘要] After examining 107 cyclones which had appeared near Japanese Islands in the winter of 1933 and 1934, we got the following results about their amalgamation.In Japanese vicinity and in winter(1) Cyclones have a tendency to amalgamate.(2) Cyclones have a tendency to develop. About 70% of all the cyclones had developed.(3) Amalgamation stimulates the development of cyclones. Of isolated cyclones, 62.5% developed, while of amalgamated cyclones 96.2% showed developement.(4) About 2/3 of cyclones which amalgamated other cyclones, had begun quick development in 18 or 24 hours before their amalgamation, but remaining 1/3 of them did not show any distinct growth in advance.(5) All of the cyclones had lower central depths at the points of amalgamation than that which they have before the amalgamation.The effect of amalgamation disappeared just after amalgamation in every case and then cyclones began their growth or decay under other (perhaps, thermal) conditions.(6) The growth of cyclones depends much more upon their courses than on amalgamation, viz. conditions of development are mainly settled by the course.(7) About 82% of cyclones changed the dircction of their march at their amalgamation.(8) The place where the amalgamation of two cyclones occurs is generally near the intersection of their courses and so that every course has its proper place of amalgamation.

[学科分类] 大气科学