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Model frame for fg_flux

Source: R/cfp_fgmod.R
cfp_fgmod.Rd

An S3 class for fg_flux() models. The class inherits from cfp_dat and adds any model specific parameters.

Usage

cfp_fgmod(
  x,
  gases = unique_gases(x),
  modes = "LL",
  param = c("c_air", "DS"),
  funs = c("arith", "harm")
)

Arguments

x

A cfp_dat object with all the necessary input datasets.

gases

(character) A character vector defining the gases for which fluxes shall be calculated.

modes

(character) A character vector specifying mode(s) for dcdz calculation. Can be "LL","LS","EF".

LL

local linear approach: within each layer a linear model is evaluated of concentration over the depth.

LS

linear spline approach: A linear spline is fitted over the complete profile with nodes at the layer intersections.

EF

exponential fit approach: An exponential function of form y=a+b*x^c is fit of concentration against depth. Using the first derivative of that function the concentration gradient is evaluated for each layer.

DA

exponential fit approach: An exponential function of form y=a+b*(1-exp(-a*x)) is fit of concentration against depth. Using the first derivative of that function the concentration gradient is evaluated for each layer. From Davidson (2006).

param

(character) A vector containing the the parameters of soilphys, for which means should be calculated, must contain "c_air" and "DS", more parameters may help interpretation.

funs

(character) A vector defining the type of mean to be used for each parameter in param. One of "arith" or "harm".

Value

A cfp_fgmod object. This inherits from cfp_dat() and adds model specific parameters.

References

DAVIDSON, E. A., SAVAGE, K. E., TRUMBORE, S. E., & BORKEN, W. (2006). Vertical partitioning of CO2 production within a temperate forest soil. In Global Change Biology (Vol. 12, Issue 6, pp. 944–956). Wiley. https://doi.org/10.1111/j.1365-2486.2005.01142.x

See also

Other model frames: cfp_altres(), cfp_fgres(), cfp_pfmod(), cfp_pfres()

Examples

cfp_fgmod(ConFluxPro::base_dat)
#> 
#> A cfp_fgmod fg_flux model. 
#> gases: CO2  
#> modes:  LL  
#> param:  c_air DS  
#> funs:  arith harm  
#> 
#> A cfp_dat object to be used as input in ConFluxPro models. 
#> id_cols: site Date gas 
#> number of profiles:  24 
#> number of groups:  2 
#>