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The Empirical Relation Between Solar Radiation And Hours Of Sunshine

J. Glover, J. Mcculloch
Published 1958 · Mathematics

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The variation with latitude of the regression parameters a and b in the conventional equation of Angstrom type between total solar radiation on a horizontal surface (Q) and hours of bright sunshine (n) has been examined. It has been shown that the slope of the relationship b is effectively constant, while the threshold value a is a function of latitude. An empirical relationship leading to the Angstrom equation at each latitude ϕ over the range 0° - 60° is derived and is shown to give values in reasonable accord with previous experience. It is



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