Abstract
This study was carried out to analyze the effects of wind speed and cloud cover on the temperature falling and cooling potential of woodlots in the Tokyo metropolitan area on summer nights. The study used Automated Meteorological Data Acquisition System (AMeDAS) data from the Japan Meteorological Agency and temperature data obtained from twenty-seven locations (elementary schools and parks) in Minato-ku, Tokyo. The prevailing wind in the Tokyo metropolitan area on summer nights is usually from the southwest, and on a day with no rain and a prevailing wind with a speed of 2 m/s or more, there is a significant negative correlation between temperature falling from 2 to 4 a.m. and wind speed and cloud cover. From the multiple regression analysis using temperature falling as the objective variable, it can be said that woodlots area has a significantly positive effect on the temperature falling under the condition wind speed from 2 m/s to less than 3 m/s. The locations surveyed were grouped depending on the percentage of woodlot area into maximum and minimum groups. When wind speed is from 2 m/s to less than 3m/s and cloud cover is 5 or less, there is a significant difference in the cooling potential of either group.
