photobiology (version 0.9.6)

irradiance: Photon (quantum) irradiance from spectral (energy) irradiance.

Description

This function returns the energy irradiance for a given waveband of a radiation spectrum.

Usage

irradiance(w.length, s.irrad, w.band = NULL, unit.out = NULL,
  unit.in = "energy", check.spectrum = TRUE, use.cached.mult = FALSE,
  use.hinges = getOption("photobiology.use.hinges", default = NULL))

Arguments

w.length

numeric Vector of wavelength (nm)

s.irrad

numeric Corresponding vector of spectral (energy) irradiances (W m-2 nm-1)

w.band

waveband or list of waveband objects The waveband(s) determine the region(s) of the spectrum that are summarized.

unit.out

character Allowed values "energy", and "photon", or its alias "quantum"

unit.in

character Allowed values "energy", and "photon", or its alias "quantum"

check.spectrum

logical Flag indicating whether to sanity check input data, default is TRUE

use.cached.mult

logical Flag indicating whether multiplier values should be cached between calls

use.hinges

logical Flag indicating whether to use hinges to reduce interpolation errors

Value

• a single numeric value with no change in scale factor: [W m-2 nm-1] -> [mol s-1 m-2]

See Also

Other irradiance functions: e_fluence, e_irrad, energy_irradiance, fluence, irrad, photon_irradiance, q_fluence, q_irrad

Examples

with(sun.data, irradiance(w.length, s.e.irrad, new_waveband(400,700), "photon"))