Variable Abbreviations


Last update: Oct 23, 2022 @ 17:27

This list gives an overview of variables commonly used in eddy covariance ecosystem research. Includes variables from ICOS, Ameriflux, FLUXNET, EddyPro, ReddyProc and others.

 

Variable List

wdt_ID LABEL DESCRIPTION UNIT (preferred) or FORMAT USED IN
520 air_molar_volume Molar volume of ambient air, Air properties m3 mol-1 EddyPro
679 IRGA75 Open-path IRGA Li-7500 -
678 IRGA72 Enclosed-path IRGA Li-7200 -
677 IRGA70 IRGA LI-7000 -
666 HS50 Sonic anemometer Gill HS-50 -
665 HS100 Sonic anemometer Gill HS-100 -
664 HOUR 2 digit hour of the day HH
663 HEAT_ Heating (prefix, e.g. for sonic heating)
661 H2O_QCL_EC H2O concentration from QCL for eddy system ppb (nmol H2O mol-1)
662 H2O_SIGMA Standard deviation of water vapor mole fraction mmolH2O mol-1 Ameriflux
716 NO Nitric oxide (NO) mole fraction in wet air nmolNO mol-1 Ameriflux
715 NH4 Ammonium concentration µg g-1 soil
714 NETRAD Net Radiation W m-2
713 NEE Net ecosystem exchange of CO2 µmol CO2 m-2 s-1 Fluxes
658 H2O_IRGA75_EC H2O concentration from IRGA Li-7500 for eddy system mmol H2O mol-1
651 H2O_IRGA70_CMB H2O concentration from IRGA Li-7000 for chamber system mmol H2O mol-1
623 FP_E0 activation energy parameter (K) in relationship between temperature and nighttime NEE from day-time partitioning ReddyProc
624 FP_GPP2000 GPP at incoming radiation of 2000 Wm-2, more robust alternative to saturation FP_k ReddyProc
625 FP_k parameter controlling the VPD limitation of GPP (daytime partitioning) (daytime partitioning) ReddyProc
626 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) ReddyProc
808 FP__sd estimated standard devation of X ReddyProc
809 PPFD Photosynthetic photon flux density, without additional suffix it is typically incoming µmolPhoton m-2 s-1
628 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 μmol m-2 s-1 ReddyProc
629 FP_RRef_Night same as FP_RRef using the same FP_E0, but from intermedate step based on night-time data ReddyProc
630 G Soil heat flux W m-2 Ameriflux
631 gas_def_timelag Flag: whether the reported time lag is the default (T) or calculated (F), Gas densities, concentrations and time lags T/F EddyPro
632 gas_flux Corrected gas flux, Corrected fluxes and quality flags µmol m-2 s-1(†) EddyPro
633 gas_mixing_ratio Measured or estimated mixing ratio of gas, Gas densities, concentrations and time lags µmol mol-1(†) EddyPro
634 gas_molar_density Measured or estimated molar density of gas, Gas densities, concentrations and time lags mmol m-3 EddyPro
635 gas_mole_fraction Measured or estimated mole fraction of gas, Gas densities, concentrations and time lags µmol mol-1(†) EddyPro
636 gas_scf Spectral correction factor for gas flux, Uncorrected fluxes # EddyPro
637 gas_strg Estimate of storage gas flux, Storage fluxes µmol s-1 m-2(†) EddyPro
638 gas_time_lag Time lag used to synchronize gas time series, Gas densities, concentrations and time lags s EddyPro
639 gas_v-adv Estimate of vertical advection flux, Vertical advection fluxes µmol s-1 m-2(†) EddyPro
640 GA_DIAG_CODE GA diagnostic value # EC raw data files (ASCII)
641 GPP Gross Primary Productivity (nighttime-based) µmolCO2 m-2 s-1 Ameriflux
642 GPP_DT Gross primary production, i.e. influx to the land surface (μmol m-2 s-1 as NEE) estimated by day-time partitioning μmol m-2 s-1 ReddyProc
643 GPP_f Gross primary production, i.e. influx to the land surface (μmol m-2 s-1 as NEE) (nighttime-based) μmol m-2 s-1 ReddyProc
644 GS Stomatal Conductance mmol H2O m-2 s-1
645 GWL Ground Water Level m
646 G_SF calibration/sensitivity factor of G uV (W m-2)-1
647 H Corrected sensible heat flux (no storage correction) W m-2
648 H2O H2O molar fraction (in humid air), wet mole fraction umol mol-1 EC raw data files (ASCII)
649 H2O_CONC H2O concentration density, molar density mmol m-3 EC raw data files (ASCII)
515 abs_lim Hard flags for individual variables for absolute limits, Statistical flags HFu/v/w/ts/co2 /h2o/ch4/n2 EddyPro
516 AGC Automatic Gain Control LI-7500 % EC raw data files (ASCII)
517 AGC Mean value of AGC for LI‑7500RS or LI‑7200RS, Instrument info # EddyPro
650 H2O_DRY H2O dry mole fraction (in dry air), mixing ratio, ppt (parts per THOUSAND) mmol mol-1 EC raw data files (ASCII)
618 FOG Fog presence
619 FP__sd estimated standard devation of X ReddyProc
620 FP_alpha canopy light utilization efficiency and represents the initial slope of the light–response curve (daytime partitioning) ReddyProc
621 FP_beta maximum CO2 uptake rate of the canopy at light saturation (μmol m-2 s-1) (daytime partitioning) μmol m-2 s-1 ReddyProc
616 FO3 Ozone (O3) turbulent flux (no storage correction) nmolO3 m-2 s-1 Ameriflux
617 FO3_SSITC_TEST Results of the quality flagging for FO3 according to Foken et al 2004, based on a combination of Steady State and Integral Turbulence Characteristics tests by Foken and Wichura (1996) (i.e., 0, 1, 2) nondimensional Ameriflux
603 FETCH_FILTER Footprint quality flag (i.e., 0, 1): 0 and 1 indicate data measured when wind coming from direction that should be discarded and kept, respectively nondimensional Ameriflux
656 H2O_IRGA72_PRF H2O concentration from IRGA Li-7200 for profile mmol H2O mol-1
657 H2O_IRGA75_CMB H2O concentration from IRGA Li-7500 for chamber system mmol H2O mol-1
598 FCH4_SSITC_TEST Results of the quality flagging for FCH4 according to Foken et al 2004, based on a combination of Steady State and Integral Turbulence Characteristics tests by Foken and Wichura (1996) (i.e., 0, 1, 2) nondimensional Ameriflux
599 FC_SSITC_TEST Results of the quality flagging for FC according to Foken et al 2004, based on a combination of Steady State and Integral Turbulence Characteristics tests by Foken and Wichura (1996) (i.e., 0, 1, 2) nondimensional Ameriflux
614 FNO2_SSITC_TEST Results of the quality flagging for FNO2 according to Foken et al 2004, based on a combination of Steady State and Integral Turbulence Characteristics tests by Foken and Wichura (1996) (i.e., 0, 1, 2) nondimensional Ameriflux
613 FNO2 Nitrogen dioxide (NO2) turbulent flux (no storage correction) nmolNO2 m-2 s-1 Ameriflux
604 FETCH_MAX Distance at which footprint contribution is maximum m
605 filename Name of the raw file (or the first of a set) from which the dataset for the current averaging interval was extracted, File info - EddyPro
606 file_records Number of valid records found in the raw file (or set of raw files), File info # EddyPro
607 FIPAR Fraction of intercepted PAR, range 0-100 % Ameriflux
608 FIT_FLAG Fit flag flag EC raw data files (ASCII)
609 FLOW_VOLRATE Volume flow rate in the sampling line L min-1 EC raw data files (ASCII)
610 FN2O Nitrous oxide (N2O) turbulent flux (no storage correction) nmolN2O m-2 s-1 Ameriflux
611 FN2O_SSITC_TEST Results of the quality flagging for FN2O according to Foken et al 2004, based on a combination of Steady State and Integral Turbulence Characteristics tests by Foken and Wichura (1996) (i.e., 0, 1, 2) nondimensional Ameriflux
612 FNO Nitric oxide (NO) turbulent flux (no storage correction) nmolNO m-2 s-1 Ameriflux
521 air_pressure Mean pressure of ambient air, either calculated from high frequency air pressure readings, or estimated based on site altitude (barometric pressure), Air properties Pa EddyPro
522 air_temperature Mean temperature of ambient air, either calculated from high frequency air temperature readings, or estimated from sonic temperature, Air properties K EddyPro
523 ALB Albedo, range 0-100 % Ameriflux
524 amp_res Hard flags for individual variables for amplitude resolution, Statistical flags HFu/v/w/ts/co2 /h2o/ch4/n2 EddyPro
525 APAR Absorbed PAR µmolPhoton m-2 s-1 Ameriflux
526 ATM Atmospheric -
527 attack_angle Hard flag for attack angle test, Statistical flags HFu/v/w/ts/co2 /h2o/ch4/n2 EddyPro
528 AVG Average -
529 AW_IN All-wave incoming radiation without correction (Pyrradiometer) W m–2
530 AW_OUT All-wave outgoing radiation without correction (Pyrradiometer) W m–2
531 BC Below Canopy -
532 BD Bulk density g cm-3
533 BICO Python script for BInary COnversion of EC raw data binary files to ASCII format - BICO
518 air_density Density of ambient air, Air properties kg m-3 EddyPro
519 air_heat_capactiy Specific heat at constant pressure of ambient air, Air properties J K-1 kg-1 EddyPro
622 FP_dRecPar records until or after closest record that has a parameter estimate associated (daytime partitioning) ReddyProc
579 discontinuities Soft flags for individual variables for discontinuities test, Statistical flags HFu/v/w/ts/co2 /h2o/ch4/n2 EddyPro
580 DNTP Time Difference between NTP Clock and Clock msec
581 DO Dissolved oxygen in water µmol L-1 Ameriflux
582 DOC Dissolved organic carbon mg l-1
583 DOY 3 digit day of year ddd
584 drop_out Hard flags for individual variables for drop-out test, Statistical flags HFu/v/w/ts/co2 /h2o/ch4/n2 EddyPro
585 DT Daytime (used in partitioning) - Fluxes
586 D_SNOW Snow depth cm, m Ameriflux
587 e Ambient water vapor partial pressure, Air properties Pa EddyPro
588 E0 activation energy parameter (K) in relationship between temperature and nighttime NEE from night-time partitioning ReddyProc
589 EC Eddy covariance - Fluxes
590 EP EddyPro Flux Calculation Software -
591 es Ambient water vapor partial pressure at saturation, Air properties Pa EddyPro
592 ET Evapotranspiration flux mm hour-1
593 EXT External -
594 extravar_mean Mean value of extravar, Custom variables (‡) EddyPro
595 FAPAR Fraction of absorbed PAR, range 0-100 % Ameriflux
534 bowen_ratio Sensible heat flux to latent heat flux ratio, Turbulence # EddyPro
535 BV_EC Battery Voltage EC system V
536 BV_iDL Internal Battery Voltage Logger V (location and replicate number is essential)
537 CH4 CH4 molar fraction (in humid air), wet mole fraction nmol mol-1, µmol mol-1
538 CH4_DRY CH4 dry mole fraction (in dry air), mixing ratio, ppb nmol mol-1 EC raw data files (ASCII)
539 CH4_MIXING_RATIO Methane (CH4) in mole fraction of dry air nmolCH4 mol-1 Ameriflux
540 CH4_QCL_CMB CH4 concentration from QCL for chamber system ppb (nmol CH4 mol-1)
541 CH4_QCL_EC CH4 concentration from QCL for eddy system ppb (nmol CH4 mol-1)
542 CH4_QCL_PRF CH4 concentration from QCL for profile system ppb (nmol CH4 mol-1)
543 CM Chamber -
544 CMB Chamber -
545 CNT Suffix for counts -
546 CO Carbon Monoxide (CO) mole fraction in wet air nmolCO mol-1 Ameriflux
547 CO2 Carbon Dioxide (CO2) mole fraction in wet air µmolCO2 mol-1 Ameriflux
548 CO2C13 Stable isotopic composition of CO2 - C13 (i.e., d13C of CO2) ‰ (permil) Ameriflux
549 CO2_BOLE tree stem CO2 vol%
550 CO2_CONC CO2 concentration density, molar density mmol m-3 EC raw data files (ASCII)
551 CO2_DRY CO2 dry mole fraction (in dry air), mixing ratio, ppm (parts per million) µmol CO2 mol-1 EC raw data files (ASCII)
552 CO2_IRGA70_CMB CO2 concentration from IRGA Li-7000 for chamber system µmol CO2 mol-1
553 CO2_IRGA70_EC CO2 concentration from IRGA Li-7000 for eddy system µmol CO2 mol-1
554 CO2_IRGA70_PRF CO2 concentration from IRGA Li-7000 for profile µmol CO2 mol-1
555 CO2_IRGA70_STM CO2 concentration from IRGA Li-7000, in stem µmol CO2 mol-1
556 CO2_IRGA72_CMB CO2 concentration from IRGA Li-7200 for chamber system µmol CO2 mol-1
557 CO2_IRGA72_EC CO2 concentration from IRGA Li-7200 for eddy system µmol CO2 mol-1
558 CO2_IRGA72_PRF CO2 concentration from IRGA Li-7200 for profile µmol CO2 mol-1
559 CO2_IRGA72_STM CO2 concentration from IRGA Li-7200, in stem µmol CO2 mol-1
560 CO2_IRGA75_CMB CO2 concentration from IRGA Li-7500 for chamber system µmol CO2 mol-1
561 CO2_IRGA75_EC CO2 concentration from IRGA Li-7500 for eddy system µmol CO2 mol-1
562 CO2_IRGA75_PRF CO2 concentration from IRGA Li-7500 for profile µmol CO2 mol-1
563 CO2_IRGA75_STM CO2 concentration from IRGA Li-7500, in stem µmol CO2 mol-1
564 CO2_MIXING_RATIO Carbon Dioxide (CO2) in mole fraction of dry air µmolCO2 mol-1 Ameriflux
565 CO2_SIGMA Standard deviation of carbon dioxide mole fraction in wet air µmolCO2 mol-1 Ameriflux
566 COND_WATER Conductivity (i.e., electrical conductivity) of water µS cm-1 Ameriflux
567 COOLER_V Cooler voltage V EC raw data files (ASCII)
568 CUP Cup Anemometer -
569 D Depth -
570 DATA_SIZE Data size of instrument data block, number of bytes in instrument record bytes EC raw data files (ASCII)
571 DATE date yyyy-mm-dd
572 date Date of the end of the averaging period, File info yyyy-mm-dd EddyPro
573 DAY 2 digit day of month dd
574 DBH diameter of tree measured at breast height(1.3 m) cm
575 DBH Diameter of tree measured at breast height (1.3m) with continuous dendrometers cm Ameriflux
576 DENDRO Dendrometer mm
577 DIF Diffuse -
578 discontinuities Hard flags for individual variables for discontinuities test, Statistical flags HFu/v/w/ts/co2 /h2o/ch4/n2 EddyPro
511 #gfRF Gap-filled using random forest same as input var DIIVE
512 #odAL Outliers were removed using outlier detection: absolute limits same as input var DIIVE
513 (footprint) model Model for footprint estimation, Footprint - EddyPro
514 (z-d)/L Monin-Obukhov stability parameter, Turbulence # EddyPro
730 NEE_U50_QCF0 measured (not gap-filled) NEE of highest quality, filtered by all quality checks and the median (50th percentile) USTAR threshold umol CO2 m-2 s-1 DIIVE
600 FETCH_70 Distance at which footprint cumulative probability is 70% m
596 FC Carbon Dioxide (CO2) turbulent flux (no storage correction) µmolCO2 m-2 s-1 Ameriflux
597 FCH4 Methane (CH4) turbulent flux (no storage correction) nmolCH4 m-2 s-1 Ameriflux
685 LE_strg Estimate of storage latent heat flux, Storage fluxes W m-2 EddyPro
686 LGR Los Gatos laser (instrument) EC raw data files (ASCII)
687 LS Lightning strike unitless
688 LSD Lightning strike distance km
689 LW _IN_RAW Longwave Incoming Radiation without blackbody correction W m-2
690 LW _OUT_RAW Longwave Incoming Radiation without blackbody correction W m-2
691 LW_BC_IN Longwave radiation, below canopy incoming W m-2 Ameriflux
692 LW_BC_OUT Longwave radiation, below canopy outgoing W m-2 Ameriflux
693 LW_IN Longwave radiation, incoming W m-2 Ameriflux
694 LW_OUT Longwave radiation, outgoing W m-2 Ameriflux
695 MAX Maximum -
696 max_wind_speed Maximum instantaneous wind speed, Rotated wind m s-1 EddyPro
697 MDS Marginal distribution sampling (Reichstein et al., 2005) - Fluxes
698 MET Meteorological Data -
699 MIN Minimum -
700 MIN Minute -
701 MINUTE 2 digit minute of the day MM
702 MIRROR_RINGDOWNTIME Mirror ring-down time µs EC raw data files (ASCII)
703 MONTH 2 digit month of year mm
704 MO_LENGTH Monin-Obukhov length m Ameriflux
705 MSW MeteoSwiss
706 N2O N2O molar fraction (in humid air), wet mole fraction nmol mol-1, µmol mol-1 EC raw data files (ASCII)
707 N2O_DRY N2O dry mole fraction (in dry air), mixing ratio, ppb nmol mol-1 EC raw data files (ASCII)
667 H_scf Spectral correction factor for sensible heat flux, Uncorrected fluxes # EddyPro
668 H_SSITC_TEST Results of the quality flagging for H according to Foken et al 2004, based on a combination of Steady State and Integral Turbulence Characteristics tests by Foken and Wichura (1996) (i.e., 0, 1, 2) nondimensional Ameriflux
669 H_strg Estimate of storage sensible heat flux, Storage fluxes W m-2 EddyPro
670 IN Incoming -
671 INC_X Inclinometer x ° EC raw data files (ASCII)
672 INC_XY Inclinometer, alternatively x (odd record numbers) and y (even record numbers) ° EC raw data files (ASCII)
673 INC_Y Inclinometer y ° EC raw data files (ASCII)
674 INT Internal -
675 IRGA Infrared Gas Analyzer -
676 IRGA62 Closed-path IRGA LI-6262 -
659 H2O_IRGA75_PRF H2O concentration from IRGA Li-7500 for profile mmol H2O mol-1
717 NO2 Nitrogen dioxide (NO2) mole fraction in wet air nmolNO2 mol-1 Ameriflux
718 NO3 Nitrate concentration µg g-1 soil
719 non_steady_wind Hard flag for non-steady horizontal test, Statistical flags HFu/v/w/ts/co2 /h2o/ch4/n2 EddyPro
720 NT Nighttime (used in partitioning) - Fluxes
721 O2 Oxygen Has to be seen when we have the sensors
722 O3 Ozone (O3) mole fraction in wet air nmolO3 mol-1 Ameriflux
723 OSO On Site Operation -
724 OUT Outgoing -
725 P Precipitation mm
726 PA Atmospheric Pressure Pa, kPa, hPa or other
727 PA_PRF Atmospheric Pressure in Profile Pa, kPa, hPa or other
728 PBLH Planetary boundary layer height m Ameriflux
729 PCH4
731 _QCF0 (suffix) measured (not gap-filled) data of highest quality DIIVE
732 _QCF01 (suffix) measured (not gap-filled) data of highest and OK quality DIIVE
733 SWC Soil water content %
734 SWP Soil water potential kPa
735 TG Grass temperature deg C
736 TPANEL Panel temperature deg C
737 NUMVALS Number of values #
738 SW_IN Shortwave radiation, incoming W m-2
739 SW_OUT Shortwave radiation, outgoing W m-2
740 PPFD_IN Photosynthetic photon flux density, incoming µmolPhoton m-2 s-1
741 PPFD_OUT Photosynthetic photon flux density, outgoing µmolPhoton m-2 s-1
742 _SCF (suffix) Spectral correction factor for the respective flux #
743 TAU Momentum flux kg m-1 s-2
744 _RANDUNC (suffix) Random uncertainty of flux same as flux EddyPro
745 _LGD (suffix) Longest gap duration seconds EddyPro
746 FH2O Corrected water flux (no storage correction) mmol H2O m-2 s-1 EddyPro
712 NDVI Normalized Difference Vegetation Index nondimensional Ameriflux
711 N2O_QCL_PRF N2O concentration from QCL for profile ppb (nmol N2O mol-1)
680 L Monin-Obukhov length, Turbulence M EddyPro
681 LE Corrected latent heat flux (no storage correction) W m-2 EddyPro
682 LEAF_WET Leaf wetness, range 0-100 % Ameriflux
683 LE_scf Spectral correction factor for latent heat flux, Uncorrected fluxes # EddyPro
684 LE_SSITC_TEST Results of the quality flagging for LE according to Foken et al 2004, based on a combination of Steady State and Integral Turbulence Characteristics tests by Foken and Wichura (1996) (i.e., 0, 1, 2) nondimensional Ameriflux
660 H2O_MIXING_RATIO Water (H2O) vapor in mole fraction of dry air mmolH2O mol-1 Ameriflux
615 FNO_SSITC_TEST Results of the quality flagging for FNO according to Foken et al 2004, based on a combination of Steady State and Integral Turbulence Characteristics tests by Foken and Wichura (1996) (i.e., 0, 1, 2) nondimensional Ameriflux
655 H2O_IRGA72_EC H2O concentration from IRGA Li-7200 for eddy system mmol H2O mol-1
654 H2O_IRGA72_CMB H2O concentration from IRGA Li-7200 for chamber system mmol H2O mol-1
652 H2O_IRGA70_EC H2O concentration from IRGA Li-7000 for eddy system mmol H2O mol-1
653 H2O_IRGA70_PRF H2O concentration from IRGA Li-7000 for profile mmol H2O mol-1
601 FETCH_80 Distance at which footprint cumulative probability is 80% m
602 FETCH_90 Distance at which footprint cumulative probability is 90% m
708 N2O_MIXING_RATIO Nitrous Oxide (N2O) in mole fraction of dry air nmolN2O mol-1 Ameriflux
709 N2O_QCL_CMB N2O concentration from QCL for chamber system ppb (nmol N2O mol-1)
710 N2O_QCL_EC N2O concentration from QCL for eddy system ppb (nmol N2O mol-1)
747 BAK Backup measurement, e.g. used at ICOS station CH-DAV
748 NEE_CUT_REF_f gap-filled NEE, filtered by all quality checks and the CUT_REF USTAR threshold (constant for all years) from FLUXNET analyses µmol CO2 m-2 s-1
749 NEE_CUT_16_f gap-filled NEE, filtered by all quality checks and the 16th percentile USTAR threshold (constant for all years) from FLUXNET analyses µmol CO2 m-2 s-1
750 NEE_CUT_84_f gap-filled NEE, filtered by all quality checks and the 84th percentile USTAR threshold (constant for all years) from FLUXNET analyses µmol CO2 m-2 s-1
751 NEE_CUT_16_orig measured (not gap-filled NEE), filtered by all quality checks and the 16th percentile USTAR threshold (constant for all years) from FLUXNET analyses µmol CO2 m-2 s-1
752 NEE_CUT_84_orig measured (not gap-filled NEE), filtered by all quality checks and the 84th percentile USTAR threshold (constant for all years) from FLUXNET analyses µmol CO2 m-2 s-1
753 Reco_CUT_16 Ecosystem respiration, i.e. outflux from the land surface (μmol m-2 s-1 as NEE) (nighttime-based), modelled from NEE_CUT_16_f umol CO2 m-2 s-1
754 Reco_CUT_84 Ecosystem respiration, i.e. outflux from the land surface (μmol m-2 s-1 as NEE) (nighttime-based), modelled from NEE_CUT_84_f umol CO2 m-2 s-1
755 Reco_CUT_REF Ecosystem respiration, i.e. outflux from the land surface (μmol m-2 s-1 as NEE) (nighttime-based), modelled from NEE_CUT_REF_f umol CO2 m-2 s-1
756 Reco_DT_CUT_16 Ecosystem respiration, i.e. outflux from the land surface (μmol m-2 s-1 as NEE) estimated by day-time partitioning, modelled from NEE_CUT_16_f umol CO2 m-2 s-1
757 Reco_DT_CUT_84 Ecosystem respiration, i.e. outflux from the land surface (μmol m-2 s-1 as NEE) estimated by day-time partitioning, modelled from NEE_CUT_84_f umol CO2 m-2 s-1
758 Reco_DT_CUT_REF Ecosystem respiration, i.e. outflux from the land surface (μmol m-2 s-1 as NEE) estimated by day-time partitioning, modelled from NEE_CUT_REF_f umol CO2 m-2 s-1
759 GPP_CUT_16_f Gross primary production, i.e. influx to the land surface (μmol m-2 s-1 as NEE) (nighttime-based), modelled from NEE_CUT_16_f μmol CO2 m-2 s-1
760 GPP_CUT_84_f Gross primary production, i.e. influx to the land surface (μmol m-2 s-1 as NEE) (nighttime-based), modelled from NEE_CUT_84_f μmol CO2 m-2 s-1
761 GPP_CUT_REF_f Gross primary production, i.e. influx to the land surface (μmol m-2 s-1 as NEE) (nighttime-based), modelled from NEE_CUT_REF_f μmol CO2 m-2 s-1
763 GPP_DT_CUT_16 Gross primary production, i.e. influx to the land surface (μmol m-2 s-1 as NEE) estimated by day-time partitioning, modelled from NEE_CUT_16_f μmol m-2 s-1
764 GPP_DT_CUT_84 Gross primary production, i.e. influx to the land surface (μmol m-2 s-1 as NEE) estimated by day-time partitioning, modelled from NEE_CUT_84_f μmol m-2 s-1
765 GPP_DT_CUT_REF Gross primary production, i.e. influx to the land surface (μmol m-2 s-1 as NEE) estimated by day-time partitioning, modelled from NEE_CUT_REF_f μmol m-2 s-1
766 LE_f gapfilled latent heat flux, filtered by all quality checks W m-2
767 LE_orig_QCF0 measured (not gap-filled) latent heat flux of highest quality W m-2
768 NEE_CUT_REF_orig_QCF0 measured (not gap-filled) NEE of highest quality, filtered by all quality checks and the CUT_REF percentile USTAR threshold (constant for all years) from FLUXNET analyses µmol CO2 m-2 s-1
769 QCF_ (prefix) quality control flag for the respective variable #
770 QCF_LE quality control flag for latent heat flux (0=best, 1=OK, 2=bad), typically for LE_f #
771 QCF_NEE quality control flag for NEE (0=best, 1=OK, 2=bad), typically for NEE_CUT_REF_f #
772 Rg Shortwave radiation, incoming W m-2 ReddyProc
773 Rg_f Gap-filled shortwave radiation, incoming, typically gap-filled using MDS W m-2 ReddyProc
774 Tair_f Gap-filled air temperature, typically gap-filled using MDS °C ReddyProc
775 TA Air temperature °C
776 Tair Air temperature °C ReddyProc
777 Tair_orig Measured (not gap-filled) air temperature °C ReddyProc
778 Rg_orig Measured (not gap-filled) shortwave radiation, incoming, typically gap-filled using MDS W m-2 ReddyProc
779 RH Relative humidity %
780 Ustar_CUT_REF_Thres USTAR threshold used for _CUT_REF_ variables m s-1 ReddyProc
781 USTAR Friction velocity m s-1
782 u* Friction velocity m s-1 EddyPro
783 VPD Vapor pressure deficit kPa or hPa
784 VPD_f Gap-filled vapor pressure deficit, typically gap-filled using MDS kPa or hPa
785 VPD_orig Vapor pressure deficit calculated (not gap-filled) from measured TA and measured RH kPa or hPa
786 VPD Vapor pressure deficit Pa EddyPro
787 ET_f Gap-filled evapotranspiration flux, calculated from gap-filled LE mmol H20 m-2 s-1 ReddyProc
788 _sd (suffix) Standard deviation ReddyProc
789 _SD (suffix) Standard deviation
790 _Thres (suffix) the threshold of uStar values used to mark insufficient conditions m s-1 ReddyProc
791 _orig (suffix) Original values used for gap filling ReddyProc
792 _f (suffix) Original values and gaps filled with mean of selected datapoints (condition depending on gap filling method) ReddyProc
793 _fqc (suffix) Quality flag assigned depending on gap filling method and window length: 0 = original, 1 = most reliable, 2 = medium, 3 = least reliable # ReddyProc
794 _fall (suffix) All values considered as gaps (for uncertainty estimates) ReddyProc
795 _fall_qc (suffix) All values considered as gaps (for uncertainty estimates) ReddyProc
796 _fnum (suffix) Number of datapoints used for gap filling # ReddyProc
797 _fsd (suffix) Standard deviation of datapoints used for gap filling (uncertainty) ReddyProc
798 _fsdu (suffix) Standard deviation across uStar thresholds (uncertainty, bias) ReddyProc
799 _fsdug (suffix) Combination of random uncertainty and uncertainty due to u*: sqrt(fsd^2 + fsdu^2) ReddyProc
800 _fmeth (suffix) 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)) ReddyProc
801 _fwin (suffix) Full window length used for gap filling ReddyProc
802 _uStar (suffix) estimate on the original unbootstrapped data ReddyProc
803 _U05 (suffix) low estimate (5% quantile of the bootstrapped uncertainty distribution) ReddyProc
804 _U50 (suffix) median estimate (50% quantile of the bootstrapped uncertainty distribution) ReddyProc
805 _U95 (suffix) high estimate (95% quantile of the bootstrapped uncertainty distribution) ReddyProc
806 Reco_f Ecosystem respiration, i.e. outflux from the land surface (μmol m-2 s-1 as NEE) (nighttime-based) μmol CO2 m-2 s-1 ReddyProc
807 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 μmol CO2 m-2 s-1 ReddyProc
810 FP Flux partitioning ReddyProc
LABEL DESCRIPTION UNIT (preferred) or FORMAT USED IN

 

References