.get_Rabs

R_abs: total absorbed radiation (W / m^2)

Implements models of leaf temperature using energy balance. It uses units to ensure that parameters are properly specified and transformed before calculations. It allows separate lower and upper surface conductances to heat and water vapour, so sensible and latent heat loss are calculated for each surface separately as in Foster and Smith (1986) <doi:10.1111/j.1365-3040.1986.tb02108.x>. It's straightforward to model leaf temperature over environmental gradients such as light, air temperature, humidity, and wind. It can also model leaf temperature over trait gradients such as leaf size or stomatal conductance. Other references are Monteith and Unsworth (2013, ISBN:9780123869104), Nobel (2009, ISBN:9780123741431), and Okajima et al. (2012) <doi:10.1007/s11284-011-0905-5>.

Chris Muir

tealeaves

Solve for Leaf Temperature Using Energy Balance

.get_Rabs function

<dl><dt>pars</dt>
<dd>Concatenated parameters (<code>leaf_par</code>, <code>enviro_par</code>, and <code>constants</code>)</dd>
<dt>unitless</dt>
<dd>Logical. Should function use parameters with <code>units</code>? The function is faster when FALSE, but input must be in correct units or else results will be incorrect without any warning.</dd></dl>

Arguments

R_abs: total absorbed radiation (W / m^2) — .get_Rabs

<dl>

<dt>pars</dt>
<dd>Concatenated parameters (<code>leaf_par</code>, <code>enviro_par</code>, and <code>constants</code>)</dd>


<dt>unitless</dt>
<dd>Logical. Should function use parameters with <code>units</code>? The function is faster when FALSE, but input must be in correct units or else results will be incorrect without any warning.</dd>

</dl>

Symbol	R	Description	Units	Default
\(\alpha_\mathrm{s}\)	`abs_s`	absorbtivity of shortwave radiation (0.3 - 4 \(\mu\)m)	none	0.80
\(\alpha_\mathrm{l}\)	`abs_l`	absorbtivity of longwave radiation (4 - 80 \(\mu\)m)	none	0.97
\(r\)	`r`	reflectance for shortwave irradiance (albedo)	none	0.2
\(\sigma\)	`s`	Stefan-Boltzmann constant	W / (m\(^2\) K\(^4\))	5.67e-08
\(S_\mathrm{sw}\)	`S_sw`	incident short-wave (solar) radiation flux density	W / m\(^2\)	1000
\(S_\mathrm{lw}\)	`S_lw`	incident long-wave radiation flux density	W / m\(^2\)	calculated
\(T_\mathrm{air}\)	`T_air`	air temperature	K	298.15
\(T_\mathrm{sky}\)	`T_sky`	sky temperature	K	calculated

.get_Rabs: R_abs: total absorbed radiation (W / m^2)

Description

Usage

Value

Arguments

Details

References

Examples