都心の緑地が有する夏季における冷却能力に関する研究
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概要
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Recently urban heat island phenomenon has become a serious object of public concern. This paper aims to clarify the cooling potential of urban greenery spaces in summer time. At first, it shows that greenery space and anthropogenic heat emission have a great effect on the temperature in downtown areas from the various data collected from 27 observation points in Minato-Ku, Tokyo. Then, it clarifies the cooling potential of greenery spaces. From the regression analysis, it can be said that the cooling influence by greenery spaces of 22,500 square meters is equivalent to the heating influence by the anthropogenic heat released from two offices of the average size in Minato-Ku, having a total floor area of about 211,726 square meters. Furthermore, the cooling potential of a greenery space of 22,500 square meters during July to September can be expected to reduce about 236 times as much quantity of the carbon dioxide as the same greenery space absorb for one year. In conclusion, greenery spaces in urban downtown areas have the function of air-conditioning given by nature.