Self-Calibrating Method for Estimating Solar Radiation from Air Temperature

摘要: Procedures are introduced for self-calibrating an equation estimating solar radiation (\iR\i\ds) in the absence of measurements. The self-calibration is based on computed clear sky envelopes and uses daily maximum minimum air temperature. resulting calibration can predict both monthly average \iR\i\ds parameters evapotranspiration equations. method was tested at nine locations United States representing low, medium, high elevations, semi-arid subhumid climates ocean generally accurate, especially when predicting \iR\i\ds. Prediction less but scattered evenly about 1:1 relationships with measured procedure as accurate a basis ratios to extraterrestrial from regional stations. more than fixed coefficients. simple conservative because it constrained by clear-sky solar- curves.