standard_globals {TTR.PGM} | R Documentation |
Standard values for global parameters
Description
This vector contains the global parameter values for the process model,
which must be supplied to the make_data()
function.
The time components are the units are per modelled time step and the length of these time
steps are defined by the parameter seconds in make_data()
.
In the descriptions below M indicates
dry mass of structural biomass (either shoot mass MS or root mass MR).
Usage
standard_globals
Format
An object of class numeric
of length 13.
Units
- mmax
Loss coefficient, per timestep (kg / kg M per timestep)
- gmax
Growth coefficient, in (kg C kg N kg M^-2)^-1 per timestep
- KM
Size dependency of mass-loss (kg M)
- CUmax
Carbon uptake rate (kg C / kg shoot M per timestep)
- NUmax
Nitrogen uptake rate (kg N / kg shoot M per timestep)
- KA
Size dependency of uptake rates (kg M)
- Jc
Substrate inhibition coefficient for carbon (kg C / kg M)
- Jn
Substrate inhibition coefficient for nitrogen (in kg N / kg M)
- q
Scaling coefficient for substrate transport, no units
- RHOc
Specific carbon transport resistance, per timestep
- RHOn
Specific nitrogen transport resistance, per timestep
- Fc
Fraction of carbon in M (kg C / kg M)
- Fn
Fraction of nitrogen in M (kg N / kg M)