Flux Processing Chain

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