flux_lrc: Standardizes CO2 fluxes at fixed PAR values

In fluxible: Ecosystem Gas Fluxes Calculations for Closed Loop Chamber Setup

Standardizes CO2 fluxes at fixed PAR values

Description

Calculates light response curves for CO2 fluxes and standardizes CO2 fluxes according to the LRC

Usage

flux_lrc(
  fluxes_df,
  type_col,
  par_ave = par_ave,
  f_flux = f_flux,
  lrc_arg = "LRC",
  nee_arg = "NEE",
  er_arg = "ER",
  lrc_group = c(),
  par_nee = 300,
  par_er = 0
)

Arguments

fluxes_df	a dataframe containing NEE, ER and LRC measurements
type_col	column containing type of flux (NEE, ER, LRC)
par_ave	column containing the PAR value for each flux
f_flux	column containing flux values
lrc_arg	argument designating LRC fluxes in type column
nee_arg	argument designating NEE fluxes in type column
er_arg	argument designating ER fluxes in type column
lrc_group	character vector of columns to use to group the LRC (campaign, site, treatment), if applicable
par_nee	PAR value to correct the NEE fluxes to
par_er	PAR value to correct the ER fluxes to

Details

The light response curves are calculated with a quadratic of the form flux(PAR) = a * PAR² + b * PAR + c

Value

the same dataframe with the additional column PAR_corrected_flux

Examples

data(co2_fluxes_lrc)
flux_lrc(
fluxes_df = co2_fluxes_lrc,
type_col = type,
par_ave = PAR_ave,
f_flux = f_flux,
lrc_arg = "LRC",
nee_arg = "NEE",
er_arg = "ER",
lrc_group = c("warming"),
par_nee = 300,
par_er = 0
)

fluxible documentation built on June 25, 2025, 1:08 a.m.