2004 年 69 巻 580 号 p. 69-75
The interest for the ultraviolet radiation of people is turned to not only quantitative increase by the ozone layer depletion but also effect on the human body. In order to understand the amount of ultraviolet radiation exposed in the daily life and to make an effective defense countermeasure, it becomes necessary to show the information on the ultraviolet radiation environment by regions, weather classification, seasons and time zones. In this study, the data of DUV value which is one of the biologically weighted ultraviolet radiation are analyzed and evaluated according to the sky conditions based on weather information, cloud amount, cloud appearance height and cloud form.