SWtrasmisivity: Calculates short wave transmisivity

Description Usage Arguments Author(s) References See Also

View source: R/water_netRadiation.G.R

Description

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).

Usage

1
SWtrasmisivity(Kt = 1, ea, dem, incidence.hor)

Arguments

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

Author(s)

Guillermo Federico Olmedo

Fonseca-Luengo, David

References

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

See Also

Other net radiation related functions: LAI, METRICtopo, albedo, incLWradiation, incSWradiation, netRadiation, outLWradiation, soilHeatFlux, solarAngles, surfaceTemperature


midraed/water documentation built on Oct. 22, 2018, 5:24 p.m.