Abstract
This study presents the effect of the heat island on urban pressure. The larger the city, the more the characteristic of urbanization can be seen clearly. We select Tokyo as a study area. We used the express way to shorten the moving time to observe. Sakura, Chiba of the erastern part of Tokyo was selected rural area. Any points in the route between Tokyo and Sakura are roughly the same distance from the seashore. Over twenty car moving observations was done from 2005 to 2006. Total moving distance was about 130 km and time for observation was about 2 hours. A ultra sonic anemometer, a digital barometer and GPS receiver were carried in the automobile. The result showed that the sea level pressure difference between urban and rural can not be seen in heat island appearance cases. We may need exact altitude data for the reduction to mean sea level.
