Abstract
We have been measuring globe temperature continuously at meteorological stations in six cities in Japan from 2007 with the cooperation of Japan Meteorological Agency. From the analysis of data observed at those stations for three years, 2007–2009, we propose a wet-bulb globe temperature (WBGT) estimation equation using only generally and widely measured meteorological indices; they are dry-bulb temperature (Ta), relative humidity (RH), solar radiation (SR) and wind speed (WS). In addition to these, we used following two indices; they are product of dry-bulb temperature by relative humidity (Ta×RH) and square of solar radiation (SR2).
We obtained the WBGT estimating equation, and it can be applied for different years and for different cities with very small bias. Using this equation, we can estimate WBGT with 1.0°C or less bias with 98.3∼99.8% confidence for six cities and for three years.
