CH-FRU FP2020 (2005-2019)

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Flux Products

  • FP2020
    Identifier: ID20200929102705

For an explanation of variables in the output file, please see here: ReddyProc Data Output Format


CH-FRU: Cumulative fluxes of NEE 2005-2019 (variable: NEE_ustar_f) in g C m-2 yr-1.


CH-FRU: Mean fluxes of NEE 2005-2019 (variable: NEE_ustar_f) in g C m-2 yr-1, shown in 20×20 classes of short-wave incoming radiation (Rg) and air temperature (TA). The plot was generated from 242874 half-hourly NEE fluxes.



PI flux product (FP) of CH-FRU ecosystem flux and meteo data over 15 years between 2005-2019, calculated for JR master thesis.

Used ustar in this dataset: U50, the median estimate of the ustar threshold (50% quantile of the bootstrapped uncertainty distribution).

Key Stats

  • Complete gap-filled years: 13 of 15 (not included are 2009 and 2010 due to large data gap)
  • Available measured values: NEE_ustar_f: 59.6% measured / 40.4% gap-filled (after all quality checks, outlier removal and ustar threshold application)
  • Available data after gap-filling: 242874 half-hourly fluxes (NEE_ustar_f)
  • Range of U50 ustar thresholds: seasonal thresholds ranging between 0.03 m s-1 (2008) and 0.17 m s-1 (2018), mean 0.07 m s-1 (2005-2019)
  • Best estimate cumulative carbon uptake (2005-2008, 2011-2019, 13 years): 4.68 kg C m-2 (NEE_ustar_f), avg. 0.360 kg C m-2 yr-1
  • Carbon source / sink behavior: The site is a sink for CO2 in 13 of 13 complete years (NEE_ustar_f).
    • Sink: Highest uptake 522 gC m-2 (2011), lowest uptake 276 gC m-2 (2015)


Dataset Production

Info about flux levels can be found here: Flux Levels


  • EddyPro for flux calculations (links to details of Level-1 fluxes are given below for each year).
  • ReddyProc for ustar threshold detection, MDS gap-filliing and partitioning.
  • R for other processing steps, e.g. merging


2005-2019: R350-IRGA75



Known Issues