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Flux Processing Chain

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Update currently in progress… (Sep 2020)

The default SFN processing chain from raw data to final flux products.

Info about flux levels

 

Sequence

  • 0.1 Meteo Parameters
    1. Collection of required meteo data (6): TA, PA, RH, SW_IN, LW_IN, PPFD_IN
  • 1.1 Flux calculations
    • SFN flux level: Level-1
    • Software: EddyPro
  • 2.1 QC Flag Expansion
    • SFN flux level: Level-2
    • Calculation of overall processing QC flag QCF for fluxes
    • Application of flag: retain values where QCF < 2
    • Software: Amp
    • …more infos soon…
  • 3.1 Storage correction
    • SFN flux level: Level-3
    • Calculation by addition: flux + storage
    • Software: Amp or ReddyProc
  • 3.2 Spike detection and removal
    • SFN flux level: Level-3
    • Software: Amp or ReddyProc
  • 3.3 u* correction
    • SFN flux level: Level-3
    • Threshold detection using NEE
    • Retain flux values > threshold
    • Done for NEE
    • The NEE threshold is also applied to N2O and CH4, but no threshold is applied to water fluxes (H2O, LE, ET)
    • Software: ReddyProc, planned for Amp
  • 4.1 Gap-filling
    • SFN flux level: Level-4
    • Default method for CO2, water and energy fluxes: MDS (using SW_IN, TA and VPD)
    • Method for N2O and CH4: to be decided
    • Software: Amp or ReddyProc
  • 4.2 Partitioning
    • SFN flux level: Level-4
    • Calculate GPP and RECO from NEE
    • Software: ReddyProc, planned for Amp