Swiss FluxNet

CH-DAV: 2001

24 Sep, 2020 Flux Notes

Notes

  • CO2 flux data between 27 Feb 2001 and incl. 23 Mar 2001 looks unusual, with consistent CO2 uptake during the night. It is possible that these fluxes are true, but an issue with the CO2 chemicals can currently not be excluded. Needs detailed check.

 

FF-201606

Current

  • Setup: Non-ICOS Setup 1997-2016 (ETH binary files)
  • Time Period(s): 2001_1
  • Instruments: R2, IRGA62
  • Final Flux Version: R2-IRGA62_FF-201606 (v2016-06)
  • Scripts: FCT 0.74, EddyPro 6.1.0 (Level-1), FQC (Level-2)
  • Flux Levels:
    • Level-1: Level-1_ID2016-07-27T221217
    • Level-1.1: –
    • Level-2: Level-2_QC-20160728-133359 *
    • Level-3-4:
      • PI Dataset:
      • FLUXNET:
        • FLUXNET2015: Level-3-4_FLUXNET2015-FN-20161021_1997-2014
        • Drought Study 2018: Level-3-4_FLUXNET2015-FN-20190503-beta-3_1997-2018
        • Warm Winter 2020: Level-3-4_FLUXNET2015-WW2020-FN-20201219_beta-3_1997-2020.06
  • FLUXNET Upload:
    • FLUXNET2015 dataset (original upload 4 Oct 2016)
    • ICOS Winter 2020 (re-upload 24 Sep 2020) ***
  • Flux Calculations By: LH
  • Meteo Screening By: WE

Notes

  • *** Update 24 Sep 2020, 30 Jun 2021: Level-2 data was re-uploaded for FLUXNET data sharing, but with CO2 flux data between 27 Feb 2001 and incl. 23 Mar 2001 excluded from the dataset. During this time period, the CO2 fluxes look suspicious and show consistent uptake during nighttime (see Fig. 1). However, a check of the found lag times during the same period indicated that something is off during this period. H2O and H fluxes look OK. It is possible that there was an issue with the CO2 chemicals in the IRGA62. This will be investigated during the next flux calculations for this year. -LH

    Fig. 1: CO2 flux (left) and H2O flux (right) at CH-DAV in 2001. The potentially erroneous phase between 27 Feb and 23 Mar 2001 is marked in red.

  • Info about the PI dataset: CH-DAV FP2020 (1997-2019)
  • Old version number: v2016-06
  • Meteo data revised by WE.
  • Date: May / June 2016
    Flux Years: 2005-2015 / EddyPro Version Used: 6.1.0 / Tool, Python Used: FluxCalc 0.74 with Anaconda3
  • Date: July 2016
    Flux Years: 1997-2005 / EddyPro Version Used: 6.1.0 / Tool, Python Used: FluxCalc 0.74 with Anaconda3 / Date: 3 Oct 2016
  • Info about the different flux levels: Flux Processing Chain

 

* Level-2 uploaded to European Fluxes Database Cluster for FLUXNET data sharing