A method for estimating global solar radiation from daily maximum and minimum temperatures: its applicability to Japan

Abstract

We investigated applicability and accuracy of this method to Japan using Japan Meteorological Agency measurement data, and obtained the following three conclusions.(1)When determining model parameters A and C based observed solar radiation data for each site, model estimation showed nearly no bias with RMSE = 4.40 MJ m-2 s-1.(2) When A and C cannot be determined due to absence of observed solar radiation data, assuming A = 0.76, and C = 2.2 is recommended in Japan.(3)The accuracy based on the method is comparable to that substituting solar radiation data at an observation point ca. 200 km far from the site.