Parameterization of Radiation Fluxes as Function of Solar Elevation, Cloudiness and Turbidity

Summary

The parameterization formula for global radiation as function of total cloud amount found earlier for Hamburg is confirmed to be valid for 7 other stations, the constants being but slightly different. A simple parameterization formula is found for global radiation from cloudless sky as function of Linke turbidity factor. Both formulae combined describe global radiation as function of solar elevation, cloud amount and turbidity factor. — Eight different parameterization formulae for atmospheric radiation from cloudless sky as function of temperature and water vapor pressure are shown to fairly agree with 12 year records of measurements. Further analysis including comparison to the results of rigorous radiative transfer calculations is required.