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Last data update: 2014.03.03

R: Daily Net Radiation

NetRad

R Documentation

Daily Net Radiation

Description

Daily net radiation [kJ m-2 d-1]

Usage

NetRad(lat, Jday, Tx, Tn, albedo = 0.18, forest = 0, slope = 0, 
aspect = 0, airtemp = (Tn+Tx)/2, cloudiness = "Estimate", 
surfemissivity = 0.97, surftemp = (Tn+Tx)/2, units = "kJm2d", 
AEparams=list(vp=NULL, opt="linear"))

Arguments

`lat`	latitude. Default is radians, but will automatically convert from degrees if value is larger than pi/2 or less than -pi/2
`Jday`	Day of the year [-]
`Tx`	Max temperature [C]
`Tn`	Min temperature [C]
`albedo`	Albedo (0-1) [-]
`forest`	Forest canopy or shade cover (0-1) [-]
`slope`	Slope [radians]
`aspect`	Ground aspect [radians from north]
`airtemp`	Average air temp [C]
`cloudiness`	Cloudiness percentage (0-1) [-] Default value will estimate cloudiness based on daily temperature difference.
`surfemissivity`	Surface emissivity [-]
`surftemp`	Surface temperature [C]
`units`	Units of the result. Defaults to "kJm2d" which returns result in kJ/m2/d, the other option is "Wm2", which will make output in W/m2
`AEparams`	Atmospheric Emissivity options. Defaults to linear approximation. To use Brutsaert option, include vapor pressure values (kPa)

Author(s)

M. Todd Walter, Josephine Archibald

Examples

NetRad(42.4*pi/180, Jday=55, Tx=2, Tn=(-3))

Results


R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> library(EcoHydRology)
Loading required package: operators

Attaching package: 'operators'

The following objects are masked from 'package:base':

    options, strrep

Loading required package: topmodel
Loading required package: DEoptim

DEoptim package
Differential Evolution algorithm in R
Authors: D. Ardia, K. Mullen, B. Peterson and J. Ulrich

Loading required package: XML
> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/EcoHydRology/NetRad.Rd_%03d_medium.png", width=480, height=480)
> ### Name: NetRad
> ### Title: Daily Net Radiation
> ### Aliases: NetRad
> 
> ### ** Examples
> 
> NetRad(42.4*pi/180, Jday=55, Tx=2, Tn=(-3))
[1] 3774.8
> 
> 
> 
> 
> 
> dev.off()
null device 
          1 
>