radiation: Extra-terrestrial Radiation

In meteor: Meteorological Data Manipulation

Description

Compute incoming radiation (J day-1 m-2 ) at the top of the atmosphere and photoperiod (daylength, sunshine duration).

Usage

ExtraTerrestrialRadiation(doy, latitude, sc=1367.7, FAO=FALSE)

Arguments

doy	integer. Day of the year
latitude	numeric. Latitude
sc	numeric. The solar constant
FAO	logical. If TRUE the algorithm described by Allen et al (1998) is used. If FALSE the approach by Goudriaan and Van Laar (1995) is used

Value

matrix with incoming radiation (J/day) and

Author(s)

Robert Hijmans, based on Python meteolib by Maarten J. Waterloo and J. Delsman http://python.hydrology-amsterdam.nl/

References

Goudriaan and Van Laar, 1995.

R.G. Allen, L.S. Pereira, D. Raes and M. Smith (1998). Crop Evaporation - Guidelines for computing crop water requirements. Irrigation and drainage paper 56. FAO, Rome, Italy. http://www.fao.org/docrep/x0490e/x0490e07.htm

Examples

ExtraTerrestrialRadiation(50, 60)
ExtraTerrestrialRadiation(50, 60, FAO=TRUE)

meteor documentation built on May 2, 2019, 4:52 p.m.