P_a: density of dry air (g / m^3)

P_a: density of dry air (g / m^3)

.get_Pa(T_leaf, pars, unitless)

Arguments

T_leaf	Leaf temperature in Kelvin
pars	Concatenated parameters (leaf_par, enviro_par, and constants)
unitless	Logical. Should function use parameters with units? The function is faster when FALSE, but input must be in correct units or else results will be incorrect without any warning.

Value

Value in g / m\(^3\) of class units

Details

$$P_\mathrm{a} = P / (R_\mathrm{air} (T_\mathrm{leaf} - T_\mathrm{air}) / 2)$$

Symbol	R	Description	Units	Default
\(P\)	P	atmospheric pressure	kPa	101.3246
\(R_\mathrm{air}\)	R_air	specific gas constant for dry air	J / (kg K)	287.058
\(T_\mathrm{air}\)	T_air	air temperature	K	298.15
\(T_\mathrm{leaf}\)	T_leaf	leaf temperature	K	input

Examples

library(tealeaves)

cs <- make_constants()
ep <- make_enviropar()
lp <- make_leafpar()

T_leaf <- set_units(298.15, K)

tealeaves:::.get_Pa(T_leaf, c(cs, ep, lp), FALSE)
#> 1183.887 [g/m^3]