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Warning

DEPRECATED: This table-based input format is deprecated as of 2025. Please use the modern YAML format instead. See our transition guide for migration help.

SUEWS_BiogenCO2.txt

Note

The biogenic CO2 module is experimental. While scientifically validated against established photosynthesis models (rectangular/non-rectangular hyperbola, conductance-based), users should verify results for their specific applications. See Troubleshooting for guidance on common issues with FcPhoto calculations.

SUEWS_BiogenCO2.txt provides the parameters needed to model the Biogenic CO2 characteristics of vegetation surfaces.

No.	Column Name	Use	Description
1	Code	L	Code linking to a corresponding look-up table.
2	alpha	MU O	The mean apparent ecosystem quantum. Represents the initial slope of the light-response curve.
3	beta	MU O	The light-saturated gross photosynthesis of the canopy. [umol m-2 s-1 ]
4	theta	MU O	The convexity of the curve at light saturation.
5	alpha_enh	MU O	Part of the alpha coefficient related to the fraction of vegetation.
6	beta_enh	MU O	Part of the beta coefficient related to the fraction of vegetation.
7	resp_a	MU O	Respiration coefficient a.
8	resp_b	MU O	Respiration coefficient b - related to air temperature dependency.
9	min_respi	MU O	Minimum soil respiration rate (for cold-temperature limit) [umol m-2 s-1].

An example SUEWS_BiogenCO2.txt can be found below:

1     2       3       4       5           6          7        8        9
Code  alpha   beta    theta   alpha_enh   beta_enh   resp_a   resp_b   min_respi
11    0.044   43.35   -999     -999        -999       1.08     0.064   0.6 ! London/Swindon , plant canopies, Ruimy et al. (1995)
12    0.0593  35      -999     -999        -999       1.08     0.064   0.6 ! Hardwood forest, Schmid et al. (2000)
13    0.0205  16.3    -999     -999        -999       1.08     0.064   0.6 ! Temperate grassland, Flanagan et al. (2002)
21    0.031   17.793  0.723    -999        -999       3.229    0.0329  0.6 ! Helsinki
31    0.005   8.747   0.96     0.016       33.454     2.43     0       0.6 ! Helsinki
32    0.004   8.747   0.96     0.016       33.353     2.43     0       0.6 ! Helsinki test
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