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An attempt has been made to correlate the total solar radiation with cloud cover and relative sunshine duration for three Nigerian stations--Gusau, Potiskum and Yola. For Potiskum, an excellent fit was obtained (standard error of estimate 0.003, adjusted coefficient of determination = 0.996, and maximum percentage error 0.90%) for both yearly and seasonal variations. For the other two stations,...
Using existing and new empirical model equations to analyse available data for nine stations located in different geographical and climatic zones in Nigeria, it is clearly demonstrated that maximum air temperature is an important climatological parameter which should be used in solar radiation modelling in Nigeria. It is also shown that seasonal variations in the values of the model parameters are...
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