gw2gc: Convert g_c (mumol CO2/m^2/s/Pa) to g_w (mumol H2O /m^2/s/Pa)

In cdmuir/leafoptimizer: Optimize leaf traits to different environments in silico

Description

Convert g_c (μmol CO2/m^2/s/Pa) to g_w (μmol H2O /m^2/s/Pa)

Convert g_c (umol CO2/m^2/s/Pa) to g_w (umol H2O /m^2/s/Pa)

Usage

gw2gc(g_w, D_c, D_w, unitless)

gc2gw(g_c, D_c, D_w, unitless)

Arguments

g_w	conductance to water vapor in units (μmol H2O / (m^2 s Pa)) of class units.
D_c	diffusion coefficient for CO2 in air in units of m^2/s of call units
D_w	diffusion coefficient for H2O in air in units of m^2/s of call units
unitless	Logical. Should units be set?
g_c	conductance to CO2 in units (μmol H2O / (m^2 s Pa)) of class units.

Details

Diffusive conductance to CO2 is generally about ~1.6x that of H2O because of the higher molecular weight. To convert, multiply conductance by the ratio of diffusion coefficients:

g_c = g_w D_c / D_w

g_w = g_c D_w / D_c

Value

Value with units μmol / (m^2 s Pa) of class units.

Examples

D_c <- set_units(1.29e-05, "m^2/s")
D_w <- set_units(2.12e-05, "m^2/s")
g_c <- set_units(3, "umol/m^2/s/Pa")
g_w <- gc2gw(g_c, D_c, D_w, unitless = FALSE)
g_w

gw2gc(g_w, D_c, D_w, unitles = FALSE)

cdmuir/leafoptimizer documentation built on Sept. 10, 2021, 7:28 p.m.