TARGAS-1 Operation Manual V. 1.02 154 support@ppsystems.com
Definition of Symbols and Physical Constants Used in Equations
Measured Parameters
Flow rate of dry air into cuvette at STP
Boundary layer resistance to water vapor
Photon flux density incident on cuvette
Calculated Parameters
Mass flow of air per unit leaf area into cuvette
Partial pressure of water vapor of air entering cuvette = H
2
Partial pressure of water vapor of stirred cuvette air = H
2
Saturated vapor pressure (inside the leaf) at leaf temperature
Temperature difference between the air and the leaf
Radiation absorbed by the leaf
Stomatal resistance to water vapor
Stomatal conductance to water vapor
2
concentration of air entering cuvette = CO
2
2
concentration of air inside and exiting the cuvette = CO
2
2
Assimilation rate (net photosynthesis)
2
2
2
concentration of sub-stomatal cavity
* Detected by IRGAs, temperature and pressure corrected, effects of foreign gas broadening (water vapor
effects) on measurement corrected.
Physical Constants
Latent heat of vaporization of water
c
Specific heat at constant pressure
Stefan Boltzmann constant
To Next Page
Loading...
Need help?
General
