slopes0_temp {fluxible} | 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.
Examples
slopes0_temp