抄録
Since I investigated the air temperature difference between the city of Tokyo and its suburb in No. 7, Vol. 7 1931 of this journal, I have been willing to research the diurnal variation of the distribution of air temperature in a certain town and its vicinity. This summer, in my staying at Ômati, Nagano Prefecture, I tried to make the microclimatic observations of air temperatures, driving an authomobile in and around the town and observing air temperatures with the whirling thermometer, which was sheltered with plated metal for the purpose of preventing from the direct sunshine. The town of Ômati (some 720m above the sea) is situated at the eastern foot of the Japanese Northern Alps, rising to the sky in the northwestern border of Nagano Prefecture, and this town has its population of about ten thousands. Fig. 3 and 4 show the distributions of air temperatures at 5 a.m. and at 2 p.m. of August 22nd, 1931 respectively aud Fig. 5 represents that 11 p.m. of August 23rd, 1931. Fig. 6 is the map, showing the distribution of the isotherms of the equal ranges, comparing the temperatures of 5 a.m. with that of 2 p.m. of the day, August 22nd, 1931. From these maps we can understand that the cultural landscape has much to do with forming the microclimate as well as the natural landscape. The effect of the distribution of air temperature in such a restricted district may be unnecessary to the study in pure meteorology, but I believe that this kind of research is absolutely necessary from the agricultural and hygienic points of view.
