constants

Physical constants

Initialized

variable	user
`sigmaSB`	`calc_brdf()`
`MH2O, Mair, rhoa, cp, g, kappa, sigmaSB`	`ebal()`
`kappa`	`zo_and_d()` `resistances()`
`rhoa, cp, MH2O, R`	`heatfluxes()`
`deg2rad, Mair, MCO2, rhoa`	`load_timeseries()`
`sigmaSB, C2K`	`Brightness_T()` `RTMt_sb()`
`deg2rad`	`RTMf()` `RTMz()` `RTMt_planck()` `RTMt_sb()`
`A, h, c`	`RTMo()`

Fields initialized in define_constants()

variable	units	type	default	description
A	mol-1	double	6.02214E23	Constant of Avogadro
h	J s	double	6.6262E-34	Planck’s constant
c	m s-1	double	299792458	Speed of light
cp	J kg-1 K-1	double	1004	Specific heat of dry air
R	J mol-1K-1	double	8.314	Molar gas constant
rhoa	kg m-3	double	1.2047	Specific mass of air
g	m s-2	double	9.81	Gravity acceleration
kappa	-	double	0.4	Von Karman constant
MH2O	g mol-1	double	18	Molecular mass of water
Mair	g mol-1	double	28.96	Molecular mass of dry air
MCO2	g mol-1	double	44	Molecular mass of carbon dioxide
sigmaSB	W m-2 K-4	double	5.67E-8	Stefan Boltzman constant
deg2rad	rad	double	pi/180	Conversion from deg to rad
C2K	K	double	273.15	Melting point of water