Tsuyoshi HONJO, Hirofumi SUGAWARA, Takehiko MIKAMI, Kenfichi NARITA, Keiji Kimura and Naoya KUWATA

We made micrometeorological investigation at Shinjuku Gyoen Park, which is one of large green areas in the center of Tokyo area. We measured special distributions of temperature and humidity, profiles of ground temperature and surface temperature by infra-red thermography. As a result, cool island effect of the park is obvious and cool air flows to the surrounding urban area. At the center of the park, low soil temperature was observed, which indicates low temperature at the park for long term trend. Heat balance calculations indicate that high sensible heat flux from the surrounding urban area and high latent heat flux from the park.