Analysis of Park Breeze in Shinjuku Gyoen from Long-term Observation

Abstract

We carried out micro-meteorological observation in Shinjuku-Gyoen for about 1 month to detect the park breeze induced by the temperature difference between the park and the surrounding urban area. From the wind direction and wind velocity observed in the observation, frequency and duration of the park breeze were analyzed. Within 38 observation days, the park breeze was observed in 28 days and the average duration per days (10 minutes unit) were 9.64. The wind velocity average during the park breeze was from 0.2 to 0.3 m/s, which was measured by the supersonic anemometer located at the south point of Shinjuku-Gyoen. The frequency of the park breeze was high from 18:00 to 6:00 and was particularly high from 2:00 to 5:00. Duration of the park breeze was also high in the same period of time.