A Multiple Linear Regression Model for Estimating Global Solar Radiation in Guangzhou, China

Empirical modeling is an essential and economical tool for estimating solar radiation. Based on statistical error tests, a model with relative sunshine duration, difference between average maximum and minimum air temperatures, relative humidity, and rainfall as parameters is recommended for estimating monthly average daily global solar radiation in Guangzhou. The present study can be used to encourage similar studies in the region that have the same climatic conditions as Guangzhou