bigleaf (version 0.8.2)

ms.to.mol: Conversion between Conductance Units

Description

Converts conductances from mass (m s-1) to molar units (mol m-2 s-1), or vice versa.

Usage

ms.to.mol(G_ms, Tair, pressure, constants = bigleaf.constants())
mol.to.ms(G_mol, Tair, pressure, constants = bigleaf.constants())

Arguments

G_ms

Conductance (m s-1)

Tair

Air temperature (deg C)

pressure

Atmospheric pressure (kPa)

constants

Kelvin - conversion degree Celsius to Kelvin
Rgas - universal gas constant (J mol-1 K-1)
kPa2Pa - conversion kilopascal (kPa) to pascal (Pa)

G_mol

Conductance (mol m-2 s-1)

Details

The conversions are given by:

$$G_{m}ol=G_{m}s\ast pressure/(Rgas\ast Tair)$$

$$G_{m}s=G_{m}ol\ast (Rgas\ast Tair)/pressure$$

where Tair is in Kelvin and pressure in Pa (converted from kPa internally)

References

Jones, H.G. 1992. Plants and microclimate: a quantitative approach to environmental plant physiology. 2nd Edition., Cambridge University Press, Cambridge. 428 p

Examples

ms.to.mol(0.005,25,100)