Humidity and Temperature Distribution and Surfaee Covers. No. 2:Studies on Local Climatology (6)

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It is usually considered that condition of surface covers as well as local topographical features is one of the princicipal factor which influence a local climatic situation. In order to discuss the magnitudes of their effects upon local temperature distribution, the author made two local climatological obser-vations at Sugadaira, Nagano Prefecture, and at Uchihara Ibaragi Prefecture. In both areas, local differences according to topographic features are very small and those to surface covers are remarkable. The areas ob servation occupy only about several square kilometers respectively. Observations were made in daytime, in the summer of 1947 using several Assman's psychrometers by means of mobile observation on foot. As the period of observation, we. chose 2-3 hours in the afternoon when the maximum temperature occurs and when the change of temperature is the smallest. In order to know distinct effects of surface covers, our observations were made at calm days when airlnasses were stagnant. We reduced temperatures observed at different times. to an average condition during the period of observation at a standard. poit. In this case we used a repeated observation method explaind by the same author in. his previous report local differences of humidity. Temperature, differences on various suface covers were not so much as were shown in figs. 5 and 7, still we could find that there were distinct differences width regard to statistical. significances. In both areas, it was warmer at cultivated fields, bare- and bush-lands and was cooler at forests, grass- and marshy lands. Mean differences in temperature between them were usually 0.61_??_0°C. (see Tabs. 8 and 10.)
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Humidity and Temperature Distribution and Surfaee Covers. No. 2:Studies on Local Climatology (6)

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