Abstract
In my previous papers on the secular change of the climate in Japan, the wide-ranged tendency of the increase of the annual amplitude of air temperature is concluded, referring to the increase of intensity of the general air current in the neighbourhood of Japan. With the increase of the great turbulency of the general air current in the middle latitude zone, the heat transfer to the high latitude zone may be intensified, producing the equalization of the latitudinal temperature distribution, as shown in Fig 1. The differences of the mean climatic conditions between the periods (I) 1888-1917 and (II) 1918-1947 are estimated as follows:
(a) the intensity of general air current has increased+16% in (II) than in (I)…(1)
(b) the latitudinal coeff. of annual mean temp. has decreased
The mean latitudinal distribution of annual mean air_??_ temp. (1888-1947) are given as follows with probable error of ±0.64°C
Assuming the height of the turbulency h=2km, the coeff. of“Austausch” (A) and the heat amount which flows through 40°N latitude from the low latitude zone (H) are calculated A=0.57×108 H=0.010cal/cm2sec. showing good agreements respectively with the results by A. Defant and G. C. Simpaon.
Referring the above ressult, some considerations on the meteorological mechanism of the heat transfer in the neighbourhood of Japan are described.
