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. 2023 Mar 15;14:1120064. doi: 10.3389/fpls.2023.1120064

Table 2.

List of the parameters used in the Eq. (10) to Eq. (14) (Veroustraete et al., 2002).

Parameter Significance Value Unit
C1 Constant 21.77
△Ha,p Activation energy 52750 J/mol
ΔS Entropy of the denaturation equilibrium of CO2 704.98 J/K/mol
Rg Gas constant 8.31 J/K/mol
T Air temperature K
Ta Air temperature °C
△Hd,p Deactivation energy 211000 J/mol
τ CO2/O2 specificity ratio
[CO2 ] CO2 concentration in the mesophyll tissue of leaves ppmv
[O2 ] O2 concentration in the mesophyll tissue of leaves 20.9 ppmv
[CO2 ] ref CO2 concentration in the atmosphere 285 ppmv
Km Affinity constant for CO2 of Rubisco [%CO2]
K0 Inhibition constant for O2 [%O2]
NDVI Normalized difference vegetation index
ks,y Heterotrophic respiratory rate coefficient gC/m2/d
Q10 The relative increase of the respiratory flux 1.5
for a 10K increase in temperature Ta