View source: R/convert-species.R
gw2gc | R Documentation |
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)
gw2gc(g_w, D_c, D_w, unitless, a) gc2gw(g_c, D_c, D_w, unitless, a)
g_w |
conductance to water vapor in units
(μmol H2O / (m^2 s Pa)) of class |
D_c |
diffusion coefficient for CO2 in air in units of m^2/s of class
|
D_w |
diffusion coefficient for H2O in air in units of m^2/s of class
|
unitless |
Logical. Should scientific units of arguments be checked and set? TRUE is safer, but slower. If FALSE, values provided are assumed to be in correct units.
|
a |
exponent used for conversion. Use 1 for still air; 0.67 for laminar flow (Jones 2014). Should be unitless. |
g_c |
conductance to CO2 in units (μmol H2O / (m^2 s Pa)) of
class |
Diffusive conductance to CO2 is greater than that of H2O because of the higher molecular weight. To convert:
g_c = g_w (D_c / D_w) ^ a
g_w = g_c (D_w / D_c) ^ a
Value with units μmol / (m^2 s Pa) of class units
.
This function will soon be moving to the standalone gunit package.
Jones H. 2014. Plants and Microclimate (3rd edition). Cambridge University Press.
library(units) 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") a = 1 g_w = gc2gw(g_c, D_c, D_w, a, unitless = FALSE) g_w gw2gc(g_w, D_c, D_w, a, unitless = FALSE)
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.