Abstract
In this paper, five sunshine-based correlations, namely, Benson et al, Gopinathan, Ögelman et al, Zabara and our new quadratic correlation are evaluated in terms of predictive accuracy. The data for 67 stations, ranging in altitude between 3 and 2210 m and in latitude between 20.15 °S and 53.30 °N, have been used. The new solar constant 1367 W m −2 is used in the analysis. The overall results show that the correlations of Benson et al and Gopinathan fall in the second rank and that the difference in estimation errors for the other three is negligibly small. Use of the new quadratic correlation is proposed because of its relatively wider spectrum of values for a and b.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
