Description Usage Arguments Author(s) References See Also
View source: R/water_netRadiation.G.R
Short wave transmisivity is estimated for broad-band considering an extended equation developed by Allen (1996), based from Majumdar et al.(1972), using coefficients developed by ASCE-EWRI (2005).
1 | SWtrasmisivity(Kt = 1, ea, dem, incidence.hor)
|
Kt |
unitless turbidity coefficient 0<Kt<=1.0, where Kt=1.0 for clean air and Kt=0.5 for extremely turbid, dusty, or polluted air |
ea |
near-surface vapor pressure (kPa) |
dem |
digital elevation model |
incidence.hor |
solar incidence angle, considering plain surface |
Guillermo Federico Olmedo
Fonseca-Luengo, David
R. G. Allen, M. Tasumi, and R. Trezza, "Satellite-based energy balance for mapping evapotranspiration with internalized calibration (METRIC) - Model" Journal of Irrigation and Drainage Engineering, vol. 133, p. 380, 2007
Majumdar, N.; Mathur, B. & Kaushik, S. Prediction of direct solar radiation for low atmospheric turbidity Solar Energy, Elsevier, 1972, 13, 383-394
ASCE-EWRI The ASCE Standardized Reference Evapotranspiration Equation Report of the ASCE-EWRI Task Committee on Standardization of Reference Evapotranspiration, 2005
Other net radiation related functions:
LAI()
,
METRICtopo()
,
albedo()
,
incLWradiation()
,
incSWradiation()
,
netRadiation()
,
outLWradiation()
,
soilHeatFlux()
,
solarAngles()
,
surfaceTemperature()
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