slopes0_temp: Slopes for each flux
In fluxible: Ecosystem Gas Fluxes Calculations for Closed Loop Chamber Setup

slopes0_temp

R Documentation

Slopes for each flux

Description

Slopes of C(t) for each flux with air temperature in various units.

Usage

slopes0_temp

Format

A tibble with 1251 rows and 29 variables

datetime: Datetime at which CO2 concentration was recorded.
temp_air: Air temperature inside the flux chamber in Celsius.
temp_soil: Ground temperature inside the flux chamber in Celsius.
conc: CO2 concentration in ppm.
PAR: Photosynthetically active radiation inside the chamber in micromol/s/sqm.
turfID: Unique ID of the turf in which the measurement took place.
type: Type of measurement: ecosystems respiration (ER) or net ecosystem exchange (NEE).
f_start: Datetime at which the measurement was started.
f_end: Datetime at which the measurement ended.
f_fluxid: Unique ID for each flux.
f_ratio: Ratio of number of datapoints over length of measurement in seconds.
f_flag_match: Flags from flux_match.
f_time: Time variable of the flux in seconds.
f_cut: Indicating if the measurement should be kept (keep) or discarded (cut).
f_Cz: Cz parameter of the C(t) function.
f_Cm: Cm parameter of the C(t) function, calculated by optim() with Cm_est as starting point.
f_a: a parameter of the C(t) function, calculated by optim() with a_est as starting point.
f_b: b parameter of the C(t) function, calculated by optim() with b_est as starting point.
f_tz: tz parameter of the C(t) function, calculated by optim() with tz_est as starting point.
f_slope: Slope of C(t) at tz
f_fit: C(t), modeled CO2 concentration as a function of time.
f_fit_slope: Output of linear model of CO2 concentration passing by C(tz) and a slope of slope_tz.
f_start_z: Datetime format of tz
f_cor_coef: Correlation coeffecient of concentration over time.
f_RMSE: RMSE of the fit.
f_quality_flag: Quality flags according to flux_quality.
f_slope_corr: Slope as advised by quality flags.
temp_fahr: Air temperature inside the flux chamber in Fahrenheit averaged over the flux measurement.
temp_kelvin: Air temperature inside the flux chamber in Kelvin averaged over the flux measurement.