Taken from Forsythe et al.(1995) A model comparison for daylength as a
function of latitude and day of year. Ecological Modelling. 80: 87 - 95
Arguments
- wf_latitude
A decimal value. The latitude of the centroid of the
windfarm, in degrees.
Value
data frame with total number of daylight hours and night hours in each
month at the specified latitude.