EstCloudiness {EcoHydRology} | R Documentation |
Estimates the cloudiness of the atmosphere by scaling to atmospheric transmissivity
EstCloudiness(Tx=(-999), Tn=(-999), trans=NULL, transMin = 0.15, transMax = 0.75, opt = "linear")
Tx |
maximum daily temperature [C] |
Tn |
minimum daily temperature [C] |
trans |
transmissivity of the atmosphere (value between 0-1) |
transMin |
Transmissivities equal and below this value will return a cloudiness value of 1 (for linear approximation) |
transMax |
Transmissivities equal and above this value will return a cloudiness value of 0 (for linear approximation) |
opt |
Currently there are two options: "linear" (Campbell 1985) and "Black" (1956) |
M. Todd Walter, Josephine Archibald
Campbell G.S. (1985) Soil Physics with Basic: Transport Models for Soil Plant Systems. Elsevier, New York
Black, J.N. (1956) The Distribution of Solar Radiation over the Earth's Surface. Theoretical and Applied Climatology 7:2 165-189
EstCloudiness(trans=0.2) EstCloudiness(20,12,opt="Black")