NetRad: Daily Net Radiation

In EcoHydRology: A Community Modeling Foundation for Eco-Hydrology

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))

Example output

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
Loading required package: parallel

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

Loading required package: XML
[1] 3774.8

EcoHydRology documentation built on May 2, 2019, 8:28 a.m.