TrenchR (version 1.1.1)

partition_solar_radiation: Diffuse Fraction for Partitioning Solar Radiation

Description

The function partitions solar radiation (W m^-2) into direct and diffuse components by estimating the diffuse fraction (k_d). The function uses the models presented in Wong2001;textualTrenchR.

Usage

partition_solar_radiation(method, kt, lat = NA, sol.elev = NA)

Value

numeric diffuse fraction.

Arguments

method

character method to use for estimating the diffuse fraction, currently available: "Liu_Jordan", "Orgill_Hollands", "Erbs", "Olyphant", "Spencer", "Reindl-1", "Reindl-2", "Lam_Li".

kt

numeric the clearness index (dimensionless), which is the ratio of the global solar radiation measured at the surface to the total solar radiation at the top of the atmosphere. (0-1)

lat

numeric latitude (degrees). Needed only if method is "Spencer".

sol.elev

numeric the solar elevation angles (degrees). Needed only if method is "Reindl-2".

References

See Also

Other microclimate functions: air_temp_profile_neutral(), air_temp_profile_segment(), air_temp_profile(), degree_days(), direct_solar_radiation(), diurnal_radiation_variation(), diurnal_temp_variation_sineexp(), diurnal_temp_variation_sinesqrt(), diurnal_temp_variation_sine(), monthly_solar_radiation(), proportion_diffuse_solar_radiation(), solar_radiation(), surface_roughness(), wind_speed_profile_neutral(), wind_speed_profile_segment()

Examples

  partition_solar_radiation(method   = "Erbs", 
                            kt       = 0.5, 
                            lat      = 40, 
                            sol.elev = 60)