gppsat: GPPsat

In dpabon/ecofunr: Deriving Ecosystem Functional Properties

Description

Ecosystem Photosynthetic Capacity with light saturated

Usage

gppsat(
  GPP,
  Radiation,
  saturation = 1500,
  method = "NRHLR",
  method_optim = "L-BFGS-B",
  Amax = "quantile",
  probs = 0.9,
  alfa = 0.5,
  Rd = 0,
  conv = 0.1,
  modelling_effiency = 0.4,
  ts = T,
  overlap = T,
  window_method = "center",
  length_day = 48,
  width = 5
)

Arguments

GPP	GPP time series. Object of class "vector".
Radiation	Radiation (PAR or APAR) time series. Object of class "vector".
saturation	Saturation of the radiation. By default 1500. See Details.
method	Light response curve model. "NRHLR" or "RHLR". See Details.
method_optim	See Details.
Amax	Plateau of the light response. Could be "quantile" to use GPP quantile or a number.
probs	If Amax is "quantile" probability must be provied (Number between 0-1). By default 0.90.
alfa	Inital slope of the light response curve. By default 0.5.
Rd	Non-linear response curve intercept. By default 0.
conv	Curvature paramenter. Ranging from 0 to 1. By default 0.1
modelling_effiency	Quality control for the model evaluation. A number between 0 and 1. By default 0.4
ts	Time series output. True or False. By default TRUE. See Details.
overlap	Rolling moving window type. Could be TRUE or FALSE. See Details.
window_method	Method used to generate the time series. Could be "left", "center", "right". See details.
length_day	Number of measures per day. By default 48
width	Window width (days). Object of class "number" or "vector". See Details.

Details

The Ecosystem Photosynthetic Capacity represents the ecosystem potential to uptake CO2 from ecosystem.

PAR can be estimated as SWIN * 2.11 (Britton & Dodd, 1976)

To include (Musavi et al., 2016)

Value

If ts = TRUE the result is a vector. If ts = FALSE the result is a single value.

dpabon/ecofunr documentation built on July 15, 2020, 12:58 p.m.