co2_fluxes_lrc

CO2 fluxes with photosynthetically active radiation (PAR) for testing and
examples of light response curves (LRC)

datasets

Toolbox to process raw data from closed loop flux chamber (or tent)
setups into ecosystem gas fluxes usable for analysis. It goes from a
data frame of gas concentration over time (which can contain several
measurements) and a meta data file indicating which measurement was done
when, to a data frame of ecosystem gas fluxes including quality diagnostics.
Organized with one function per step, maximizing user flexibility and backwards
compatibility. Different models to estimate the fluxes from the raw data are
available: exponential as described in
Zhao et al (2018) <doi:10.1016/j.agrformet.2018.08.022>, exponential as described in
Hutchinson and Mosier (1981) <doi:10.2136/sssaj1981.03615995004500020017x>,
quadratic, and linear. Other functions include quality assessment,
plotting for visual check, calculation of fluxes based on the setup
specific parameters (chamber size, plot area, ...), gross primary production
and transpiration rate calculation, and light response curves.

Joseph Gaudard

fluxible

Ecosystem Gas Fluxes Calculations for Closed Loop Chamber Setup

co2_fluxes_lrc function

A tibble with 257 rows and 5 variables<dl>
<dt>f_flux</dt>
<dd>CO2 flux in mmol/sqm/hour.</dd><dt>datetime</dt>
<dd>Time and date of the measurement.</dd><dt>PAR_ave</dt>
<dd>Photosynthetically active radiation inside the chamber in
micromol/s/sqm averaged over the flux measurement.</dd><dt>type</dt>
<dd>Type of measurement: ecosystems respiration (ER), net ecosystem
exchange (NEE), or light response curve (LRC).</dd><dt>warming</dt>
<dd>Treatment: control or warming.</dd>
</dl>

Format

CO2 fluxes with PAR values — co2_fluxes_lrc

A tibble with 257 rows and 5 variables<dl>
<dt>f_flux</dt>
<dd>CO2 flux in mmol/sqm/hour.</dd>

<dt>datetime</dt>
<dd>Time and date of the measurement.</dd>

<dt>PAR_ave</dt>
<dd>Photosynthetically active radiation inside the chamber in
micromol/s/sqm averaged over the flux measurement.</dd>

<dt>type</dt>
<dd>Type of measurement: ecosystems respiration (ER), net ecosystem
exchange (NEE), or light response curve (LRC).</dd>

<dt>warming</dt>
<dd>Treatment: control or warming.</dd>


</dl>

co2_fluxes_lrc: CO2 fluxes with PAR values

Description

Usage

Arguments

Format

Examples