Data output format
The default corresponds to the previous pvWave BGC online tool and few alternative options are provided with the web-service.
Default: Online Tool
Description of gap filling output variables
|_Thres||the threshold of uStar values used to mark insufficient conditions|
|_orig||Original values used for gap filling||orig|
|_f||Original values and gaps filled with mean of selected datapoints (condition depending on gap filling method)||_f|
|_fqc||Quality flag assigned depending on gap filling method and window length:|
0 = original, 1 = most reliable, 2 = medium, 3 = least reliable
|_fall||All values considered as gaps (for uncertainty estimates)||_f_unc|
|_fall_qc||All values considered as gaps (for uncertainty estimates)||_fqc_unc|
|_fnum||Number of datapoints used for gap filling||_fn,|
|_fsd||Standard deviation of datapoints used for gap filling (uncertainty)||_fs,|
|_fsdu||Standard deviation across uStar thresholds (uncertainty, bias)|
|_fsdug||Combination of random uncertainty and uncertainty due to u*: sqrt(fsd^2 + fsdu^2)|
|_fmeth||Method used for gap filling:|
1 = similar meteo condition (sFillLUT with Rg, VPD, Tair)
2 = similar meteo (sFillLUT with Rg only)
3 = mean diurnal course (sFillMDC))
|_fwin||Full window length used for gap filling||_fwin,|
Bootstrapping the uStar-Threshold estimate
When bootstrapping was performed, several output columns are re-estimated with gap-Filling based on low, median, and high estimates of the uStar-Threshold.
|_uStar||estimate on the original unbootstrapped data||(empty)|
|_U05||low estimate (5% quantile of the bootstrapped uncertainty distribution)|
|_U50||median estimate (50% quantile of the bootstrapped uncertainty distribution)|
|_U95||high estimate (95% quantile of the bootstrapped uncertainty distribution)|
A missing '_uStar' suffix in NEE, GPP, or Reco, it corresponds either to not performing uStar filtering or to uStar threshold of the non-bootstrapped data.
Description of flux partitioning output variables
|Variable name||Description||Old name|
|GPP_f||Gross primary production, i.e. influx to the land surface (μmol m-2 s-1 as NEE) (nighttime-based)|
|Reco_f||Ecosystem respiration, i.e. outflux from the land surface (μmol m-2 s-1 as NEE) (nighttime-based)|
|GPP_DT||Gross primary production, i.e. influx to the land surface (μmol m-2 s-1 as NEE) estimated by day-time partitioning|
|Reco_DT||Ecosystem respiration, i.e. outflux from the land surface (μmol m-2 s-1 as NEE) estimated by day-time partitioning|
|E0||activation energy parameter (K) in relationship between temperature and nighttime NEE from night-time partitioning|
|R_ref||respiration at reference temperature parameter (μmol m-2 s-1 as NEE) in relationship between temperature and nighttime NEE from night-time partitioning|
|FP_alpha||canopy light utilization efficiency and represents the initial slope of the light–response curve (daytime partitioning)|
|FP_beta||maximum CO2 uptake rate of the canopy at light saturation (μmol m-2 s-1) (daytime partitioning)|
|FP_k||parameter controlling the VPD limitation of GPP (daytime partitioning) (daytime partitioning)|
|FP_qc||quality flag of the estimated parameters: 0: good parameter fit, 1: some parameters out of range, required refit, 2: next parameter estimate is more than two weeks away (daytime partitioning)|
|FP_dRecPar||records until or after closest record that has a parameter estimate associated (daytime partitioning)|
|FP_GPP2000||GPP at incoming radiation of 2000 Wm-2, more robust alternative to saturation FP_k|
|FP_E0||activation energy parameter (K) in relationship between temperature and nighttime NEE from day-time partitioning|
|FP_RRef||respiration at reference temperature parameter (μmol m-2 s-1 as NEE) in relationship between temperature and nighttime NEE from day-time partitioning|
|FP_RRef_Night||same as FP_RRef using the same FP_E0, but from intermedate step based on night-time data|
|FP_<X>_sd||estimated standard devation of X|
|FP_qc||quality flag of day-time partitioning: 0: good parameter fit, 1: some parameters LRC parameters were out of range, required refit, 2: next parameter estimate is more than two weeks away|
In difference to the Online-Tool-default,
- the _uStar suffix is handled differently:
- A missing '_uStar' suffix it corresponds to not applying filtering for u* threshold.
- For filtering with the uStar threshold estimated on non-bootstrapped data, the suffix '_uStar' is used.
Provides data output similar to the formatting of the 2015 fluxnet data release.
The following differences to default REddyProc 1.2. output:
- Formatted as comma-separated ASCII file.
- All rows after the first row contain data, i.e. no units in the second row
- Time (end of the measurement interval) is specified in column TIMESTAMP_END in ISO timestamp format: YYYMMDDHHMM
- During export column names are translated.
- Fluxes with suffix of used uStar threshold quantile
- "^NEE_U(\\d\\d)_f$" -> "NEE_VUT_\\1", (the pattern corresponds to the two digits quantile of the uStar threshold distribution)
- "^GPP_U(\\d\\d)_f$" -> "GPP_NT_VUT_\\1"
- "^GPP_DT_U(\\d\\d)$" -> "GPP_DT_VUT_\\1"
- "^Reco_U(\\d\\d)$" -> "RECO_NT_VUT_\\1"
- "^Reco_DT_U(\\d\\d)$" -> "RECO_DT_VUT_\\1", "GPP"
- "^Ustar_Thresh_U(\\d\\d)$" -> "USTAR_THRESHOLD_VUT_\\1"
- "^NEE_U50_fqc$" -> "NEE_VUT_USTAR50_QC"
- "^NEE_U50_fsd$" -> "NEE_VUT_USTAR50_RANDUNC"
- "^NEE_U50_fnum$" -> "NEE_VUT_USTAR50_RANDUNC_N
- further variables
- "night" -> "NIGHT", "Rg_f" -> "SW_IN_F_MDS", "Rg_fqc" -> "SW_IN_F_MDS_QC", "PotRad_NEW" -> "SW_IN_POT", "Tair_f" -> "TA_F_MDS", "Tair_fqc" -> "TA_F_MDS_QC", "VPD_f" -> "VPD_F_MDS", "VPD_fqc" -> "VPD_F_MDS_QC"
- Fluxes with suffix of used uStar threshold quantile