R/data-slopes0_temp.R

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

#' Slopes for each flux
#'
#' Slopes of C(t) for each flux with air temperature in various units.
#'
#' @format A tibble with 1251 rows and 29 variables
#' \describe{
#' \item{datetime}{Datetime at which CO2 concentration was recorded.}
#' \item{temp_air}{Air temperature inside the flux chamber in Celsius.}
#' \item{temp_soil}{Ground temperature inside the flux chamber in Celsius.}
#' \item{conc}{CO2 concentration in ppm.}
#' \item{PAR}{Photosynthetically active radiation inside the chamber
#' in micromol/s/sqm.}
#' \item{turfID}{Unique ID of the turf in which the measurement took place.}
#' \item{type}{Type of measurement: ecosystems respiration (ER)
#' or net ecosystem exchange (NEE).}
#' \item{f_start}{Datetime at which the measurement was started.}
#' \item{f_end}{Datetime at which the measurement ended.}
#' \item{f_fluxid}{Unique ID for each flux.}
#' \item{f_ratio}{Ratio of number of datapoints over length of measurement
#' in seconds.}
#' \item{f_flag_match}{Flags from flux_match.}
#' \item{f_time}{Time variable of the flux in seconds.}
#' \item{f_cut}{Indicating if the measurement should be kept (keep)
#' or discarded (cut).}
#' \item{f_Cz}{Cz parameter of the C(t) function.}
#' \item{f_Cm}{Cm parameter of the C(t) function, calculated by optim() with
#' Cm_est as starting point.}
#' \item{f_a}{a parameter of the C(t) function, calculated by optim() with
#' a_est as starting point.}
#' \item{f_b}{b parameter of the C(t) function, calculated by optim() with
#' b_est as starting point.}
#' \item{f_tz}{tz parameter of the C(t) function, calculated by optim() with
#' tz_est as starting point.}
#' \item{f_slope}{Slope of C(t) at tz}
#' \item{f_fit}{C(t), modeled CO2 concentration as a function of time.}
#' \item{f_fit_slope}{Output of linear model of CO2 concentration passing by
#' C(tz) and a slope of slope_tz.}
#' \item{f_start_z}{Datetime format of tz}
#' \item{f_cor_coef}{Correlation coeffecient of concentration over time.}
#' \item{f_RMSE}{RMSE of the fit.}
#' \item{f_quality_flag}{Quality flags according to flux_quality.}
#' \item{f_slope_corr}{Slope as advised by quality flags.}
#' \item{temp_fahr}{Air temperature inside the flux chamber in Fahrenheit
#' averaged over the flux measurement.}
#' \item{temp_kelvin}{Air temperature inside the flux chamber in Kelvin
#' averaged over the flux measurement.}
#' }
#' @examples
#' slopes0_temp
"slopes0_temp"