get.computeA get.computeA Compute the net CO2 assimilation rate using the Farquhar model Note: even though computeA() is written as a separate function, the code is, in fact, executed exactly this point in the file (i.e. between the previous if clause and the next section

get.computeA get.computeA Compute the net CO2 assimilation rate using the Farquhar model Note: even though computeA() is written as a separate function, the code is, in fact, executed exactly this point in the file (i.e. between the previous if clause and the next section

Usage

get.computeA(
  Ci,
  Type,
  g_m,
  Vs_C3,
  MM_consts,
  Rd,
  Vcmax,
  Gamma_star,
  Je,
  effcon,
  atheta,
  kpepcase
)

Arguments

Ci

is internal CO2 concentration

Type

is photosynthetic pathway type ("C3" or "C4")

g_m

is mesophyll conductance

Vs_C3

is maximum carboxylation rate for C3 plants

MM_consts

is Michaelis-Menten constants for Rubisco and oxygenase reactions

Rd

is dark respiration rate

Vcmax

is maximum carboxylation rate

Gamma_star

CO2 compensation point in the absence of mitochondrial respiration

Je

electron transport rate in the chloroplasts

effcon

electron transport to carboxylation efficiency

atheta

curvature parameter for the response of electron transport to irradiance

kpepcase

the relative limitation of electron transport by irradiance

Value

A: net CO2 assimilation rate (and related intermediate variables, depending on Type/g_m branch taken).

Details

Even though computeA()-style logic is written as a separate function here, the calculation is executed exactly at this point in the original SCOPE model's control flow (i.e., between the previous if clause and the next section) — this R port keeps that same ordering.