CLASSIFICATION OF THE WIND SYSTEMS IN KANTO PLAIN BY USING CLUSTER ANALYSIS

Abstract

The wind systems in Kanto Plain area affect urban heat island and air pollution dispersion of the Tokyo metropolitan area. It is important from the viewpoint of urban planning to grasp surface airflow patterns. In this study, we classified the wind systems by using cluster analysis and diurnal variation patterns. The seasonality of each cluster was also clarified. As the result, most of wind systems in the Kanto Plain area were classified into three types; summer type, winter type and quiet day type. Summer type is prevailed by seasonal south wind and sea breeze. Winter type is prevailed by seasonal northwest wind. Quiet day type which occurs throughout the year is relatively quiet or prevailed by weak Northeast wind.