of Sunshine Duration to Solar
Irradiation
• Method used Suehrcke (2000), based on widely used Angstrom-Prescott
equation.
– Relates the sunshine fraction to monthly average solar radiation
– Lots of lower level calculations required: sun–earth variables, latitude, day
hours, solar declination, extra-terrestrial irradiation, sunset hour angle…
=
OH
HK
radiation stialextraterre surface
/media/ces/Burnett_Dougal_CES_2010.pdf