solar_radiation {TrenchR}

Estimate the Three Components of Solar Radiation (Direct, Diffuse and Reflected)

Description

The function estimate direct, diffuse, and reflected components of solar radiation (W m^-2) as a function of day of year using the model in Campbell and Norman (1998).

Usage

solar_radiation(doy, psi, tau, elev, rho = 0.7)

Arguments

doy

numeric the day of year; day_of_year.

psi

numeric zenith angle (radians).

tau

numeric atmospheric transmissivity (proportion), which is ratio of global solar radiation at ground level to extra-terrestrial solar radiation.

elev

numeric elevation (meters).

rho

numeric albedo as a proportion (0-1).

Value

numeric radiation components - direct, diffused and reflected (W m^-2).

References

Campbell GS, Norman JM (1998). Introduction to environmental biophysics, 2nd ed. edition. Springer, New York. ISBN 0387949372.

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(), partition_solar_radiation(), proportion_diffuse_solar_radiation(), surface_roughness(), wind_speed_profile_neutral(), wind_speed_profile_segment()

Examples

  solar_radiation(doy  = 112, 
                  psi  = 1, 
                  tau  = 0.6, 
                  elev = 1500, 
                  rho  = 0.7)