AtmosphericEmissivity {EcoHydRology} | R Documentation |
The emissivity of the atmsophere [-]
AtmosphericEmissivity(airtemp, cloudiness, vp=NULL, opt="linear")
airtemp |
Air temperature: air temperature [C] |
cloudiness |
Cloudiness: fraction of the sky covered in clouds [-] |
vp |
Vapor Pressure : [kPa] |
opt |
option: either "linear" for a linear relationship between clear sky emissivity and temperature, or "Brutsaert" to use Brutsaert's(1975) clear sky emissivity formulation - this requires input for vapor pressure |
The emissivity of the atmsophere [-]
Fuka, D.R., Walter, M.T., Archibald, J.A.
Campbell, G. S., Norman, J.M., 1998. An Introduction to Environmental Biophysics, second ed., Springer, New York, p. 286.
Brutsaert, W. (1975 On a Derivable Formula for Long-Wave Radiation From Clear Skies. Water Resources Research, 11(5) 742-744
temp=15 clouds=.5 AtmEm=AtmosphericEmissivity(temp,clouds) print(AtmEm)