東亞に於ける秋季の天候の動氣候學的觀察

Abstract

The autumn weather in the Far Eastern Asia is researched from the stand point of dynamical climatology and the results are summarized as follows.(1) Summer weather changes abruptly into autumn weather. The change of minimum air temperature at Maebasi and the alternation of pressure distribution on the synoptic chart show clearly these phenomena.(2) The above phenomena can be explained as the out break of horizontal stability due to the cooling of asiatic continent. This is proved theoretically if we assume simple model.(3) The autumn weather is considered to be influenced by the interaction of continental air mass and oceanic air mass, and if the frontal zone between these two air masses becomes sharp, the weather becomes bad and the depressions develop_??_ and progress on this zone.(4) The out flow of continental air mass from asiatic continent is the fundamental pheneomena in this season and the formation of continental high are discussed theoretically.(5) One of the typical pressure distribution in this season is “High in the North, Low in the South” This weather is considered as transitional weather from summer to autumn, and it corresponds to Baiu, i.e. the rainy seasonin June and July.(6) Thermodynamical properties of typhoon are investigated, and the kinetic energy, power, total mass of prcepitation, are estimated to be about 2×1024 ergs. 4×1010 horse power, 10×1014gr/day respectively for ordinary typhoon.