SW to PAR

Solar Radiation to PPFD

sw2par(sw)

Arguments

sw	shortwave radiation (W/m2 == J/m2/s)

Value

PAR W/m2

Details

Here the input is the total solar radiation so to obtain in the PAR spectrum need to multiply by 0.486 From Campbell and Norman p151 This is based on the approximation that PAR is 0.45-0.50 of the total radiation