Yearly Notes

Yearly Notes#

Info#

  • This page gives information about current and past flux calculations, including used software versions, and important info for each year.

  • Overview table of the setup across years

  • Sheet with processing info for recent versions

  • Info about some time periods is given in the form of the names of the original eddy covariance raw data files, e.g. 2019021819.C00.

  • Sonic orientation/height: Should be 7° / 2.41m more or less and consistent across all years. In a comparison of histograms of wind directions between 2005 and 2023 showed that a sonic orientation of 7° offset to north yields very similar results across years all years. Info from one of the oldest setup files (locations.table) that were used for documenting setup info in earlier years listed the sonic orientation at 0°. In 2016, 7° north offset was measured for the north spar, the sonic setup should be approx. the same across all years.

General abbreviations#

  • IRGA fluxes: CO2, H2O, H

  • QCL fluxes: N2O, CH4

  • LGR fluxes: N2O, CH4

  • FF-: Final fluxes

Datasets#

2024#

FF-202501 (IRGA75)#

2023#

General notes#

  • During this year, there have been some sporadic events where the unrotated vertical wind variable W_UNROT shows a clear (most likely constant) offset. These periods are generally short and lasted a few days. These periods need to be calculated separately from unaffected periods by using a constant W offset in EddyPro. Not correcting for this issue causes fluxes to become less pronounced, e.g. the diel cycle becomes less clear.

  • Wind offset in sonic anemometer data for vertical wind component W: W jumps to higher values and then remains stable around this higher value. This issue can be more or less corrected in EddyPro by defining an offset for the vertical wind measurements. The affected time periods are (inlcuding offsets, using middle timestamp for half-hours):

W offsets#

  • All these time periods should be calculated together in one run, using a mean offset of 1.173283.

  • between 2023-04-17 10:15 and 2023-04-20 06:15: 1.163599708029197

  • between 2023-07-21 15:45 and 2023-07-21 18:45: 1.1862112857142857

  • between 2023-08-23 14:15 and 2023-08-24 18:45: 1.2251075862068965

  • between 2023-08-26 16:45 and 2023-08-30 08:45: 1.0117830873920455 (during this time period, there seems to be another issue on 28 Aug 2023, but only for approx. one half day, otherwise this offset would also be approx. 1.2)

  • between 2023-09-14 00:45 and 2023-09-18 15:45: 1.187201864864865

  • between 2023-09-22 00:45 and 2023-09-26 14:45: 1.1451817454545454

  • between 2023-09-28 08:45 and 2023-09-29 14:15: 1.132388540677966.

FF-202503 (IRGA75)#

  • Final Flux Version: R350-IRGA75_FF-202503

  • Level-1:

    • Level-1_CH-CHA_FR-20250303-102224

    • Level-1_CH-CHA_FR-20250304-093959_W-OFFSET (corrected W offset periods)

  • Level-4 ID(s): in progress

  • Setup: Setup since 2005

  • Instruments: R350, IRGA75

  • Scripts: bico v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9)

  • FLUXNET Upload: -

  • Notes:

    • Progress notes on Google Docs

    • calculated without angle-of-attack correction

    • W offset periods were calculated separately from unaffected time periods

Deprecated versions#

  • FF-202407 (IRGA75) | Final Flux Version: R350-IRGA75_FF-202407 | Level-1: Level-1_FR-20240726-181748 | Level-4 ID(s): in progress | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: bico v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9) | FLUXNET Upload: - | Notes: Progress notes on Google Docs; calculated without angle-of-attack correction

  • FF-202403 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-202403 | Level-1: Level-1_FR-20240326-143413_AoA | Level-4 ID(s): in progress | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: bico v1.6.0, fluxrun v1.3.1 (EddyPro v7.0.9) | FLUXNET Upload: - | Notes: calculated with angle-of-attack correction, to be consistent with previous years

  • FF-202403 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-202403 | Level-1: Level-1_FR-20240326-143214_NoAoA | Level-4 ID(s): in progress | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: bico v1.6.0, fluxrun v1.3.1 (EddyPro v7.0.9) | FLUXNET Upload: 27 Mar 2024 | Notes: variant calculated without angle-of-attack correction

2022#

FF-202407 (IRGA75)#

  • Final Flux Version: R350-IRGA75_FF-202407

  • Level-1: Level-1_FR-20240726-181747, Level-1_FR-20240726-181749

  • Level-4 ID(s): in progress

  • Setup: Setup since 2005

  • Instruments: R350, IRGA75

  • Scripts: bico v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9)

  • FLUXNET Upload: -

  • Notes:

FF-202407 (LGR)#

  • Final Flux Version: R350-LGR_FF-202407

  • Level-1: Level-1_FR-20240809-181345

  • Level-4 ID(s): in progress

  • Setup: Setup since 2005

  • Instruments: R350, LGR

  • Scripts: bico v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9)

  • FLUXNET Upload: -

  • Notes:

Deprecated versions#

  • FF-202307 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-202307 | Level-1: Level-1_FR-20231026-115535_AoA | Level-4 ID(s): in progress | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: bico v1.6.0, fluxrun v1.3.1 (EddyPro v7.0.9) | FLUXNET Upload: - | Notes: calculated with angle-of-attack correction, to be consistent with previous years

  • FF-202307 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-202307 | Level-1: Level-1_FR-20231026-161730_NoAoA | Level-4 ID(s): in progress | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: bico v1.6.0, fluxrun v1.3.1 (EddyPro v7.0.9) | FLUXNET Upload: 27 Oct 2023 | Notes: variant calculated without angle-of-attack correction

  • FF-202307 (LGR, deprecated) | Final Flux Version: R350-LGR_FF-202307 | Level-1: Level-1_FR-20231028-112955 | Level-4 ID(s): in progress | Setup: Setup since 2005 | Instruments: R350, LGR | Scripts: bico v1.6.0, fluxrun v1.3.1 (EddyPro v7.0.9) | FLUXNET Upload: - | Notes: no angle-of-attack correction

2021#

Fig. 10 Photo of the CH-CHA research site on 20 Jul 2021. Photo: Grassland Sciences Group, ETH Zurich#

FF-202407 (IRGA75)#

  • Final Flux Version: R350-IRGA75_FF-202407

  • Level-1: Level-1_FR-20240727-005940, Level-1_FR-20240727-010348

  • Level-4 ID(s): in progress

  • Setup: Setup since 2005

  • Instruments: R350, IRGA75

  • Scripts: bico v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9)

  • FLUXNET Upload: -

  • Notes:

FF-202407 (LGR)#

  • Final Flux Version: R350-LGR_FF-202407

  • Level-1: Level-1_FR-20240809-181345

  • Level-4 ID(s): in progress

  • Setup: Setup since 2005

  • Instruments: R350, LGR

  • Scripts: bico v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9)

  • FLUXNET Upload: -

  • Notes:

FF-202407 (QCL)#

  • Final Flux Version: R350-QCL_FF-202407

  • Level-1: Level-1_FR-20240809-181351

  • Level-4 ID(s): in progress

  • Setup: Setup since 2005

  • Instruments: R350, QCL

  • Scripts: bico v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9)

  • FLUXNET Upload: -

  • Notes:

Deprecated versions#

  • FF-202306 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-202306 | Level-1: 3 parts: Level-1_FR-20230809-104348 / Level-1_FR-20230809-104955 / Level-1_FR-20230810-095226 | Level-4 ID(s): in progress | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: bico v1.3.0, fluxrun v1.3.0 (EddyPro v7.0.9) | FLUXNET Upload: - | Notes: calculated with angle-of-attack correction, to be consistent with previous years

  • FF-202306 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-202306 | Level-1: 3 parts: Level-1_FR-20230626-120326 / Level-1_FR-20230807-121916 / Level-1_FR-20230808-115504 | Level-4 ID(s): in progress | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: bico v1.3.0, fluxrun v1.3.0 (EddyPro v7.0.9) | FLUXNET Upload: 21 Aug 2023 | Notes: variant calculated without angle-of-attack correction

  • FF-202306 (QCL, deprecated) | Final Flux Version: R350-QCL_FF-202306 | Level-1: Level-1_FR-20230626-120549 | Level-4 ID(s): in progress | Setup: Setup since 2005 | Instruments: R350, QCL | Scripts: bico v1.3.0, fluxrun v1.3.0 (EddyPro v7.0.9) | FLUXNET Upload: - | Notes: without angle-of-attack correction

  • FF-202306 (LGR, deprecated) | Final Flux Version: R350-LGR_FF-202306 | Level-1: Level-1_FR-20230807-095427 / Level-1_FR-20230807-095844 | Level-4 ID(s): in progress | Setup: Setup since 2005 | Instruments: R350, LGR | Scripts: bico v1.3.0, fluxrun v1.3.0 (EddyPro v7.0.9) | FLUXNET Upload: - | Notes: without angle-of-attack correction

2020#

FF-202407 (IRGA75)#

  • Final Flux Version: R350-IRGA75_FF-202407

  • Level-1: Level-1_FR-20240727-210028, Level-1_FR-20240727-210053, Level-1_FR-20240730-112251

  • Level-4 ID(s): in progress

  • Setup: Setup since 2005

  • Instruments: R350, IRGA75

  • Scripts: bico v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9)

  • FLUXNET Upload: -

  • Notes:

FF-202407 (QCL)#

  • Final Flux Version: R350-QCL_FF-202407

  • Level-1: Level-1_FR-20240809-181351, Level-1_FR-20240813-123539, Level-1_FR-20240813-124302

  • Level-4 ID(s): in progress

  • Setup: Setup since 2005

  • Instruments: R350, QCL

  • Scripts: bico v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9)

  • FLUXNET Upload: -

  • Notes:

Deprecated versions#

  • FF-202108 (IRGA75, deprecated) | Final Flux Version: FF-202108 | Level-1: Level-1_FR-20210727-113252 | Level-4 ID(s): Level-3-4_PI_dataset_2005-2020 | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: FR 0.5.0 with EddyPro 7.0.6, DIIVE v0.21.0, BICO 0.5.0 (binary conversion) | FLUXNET Upload: - | Notes: Differences to previous version: calculated with angle-of-attack correction

  • FF-202101 (QCL, deprecated) | Final Flux Version: R350-QCL_FF-202101 | Level-1: Level-1_FR-20210329 / Level-1_FR-20210329-101401 / Level-1_FR-20210329-161921 | Level-4 ID(s): Level-3-4_PI_dataset_N2O_CH4_2019-2020 | Setup: Setup since 2005 | Instruments: R350, QCL | Scripts: FR 0.5.0 with EddyPro 7.0.6, DIIVE v0.21.0, BICO 0.5.0 (binary conversion) | FLUXNET Upload: - | Notes: -

  • FF-202101 (IRGA75, deprecated) | Final Flux Version: FF-202101 | Level-1: Level-1_FR-20210318-171526 | Level-4 ID(s): Level-3-4_FLUXNET-WW2020_RELEASE-2022-1_FN-20220209 | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: BICO v0.5.0, FLUXRUN v0.5.0(?), DIIVE v0.17.0 | FLUXNET Upload: 1 Apr 2021 | Notes: Data for full year; Used file for dynamic vegetation height

2019#

Fig. 11 Photo of the CH-CHA research site in Oct 2019. Photo: Grassland Sciences Group, ETH Zurich#

General notes#

  • QCL time lag is quite unclear during the time period between 2019021819.C00 and 2019043019.C00. Most likely around +7s for N2O and CH4.

FF-202407 (IRGA75)#

FF-202407 (QCL)#

  • Final Flux Version: R350-QCL_FF-202407

  • Level-1: Level-1_FR-20240812-132901, Level-1_FR-20240812-142125, Level-1_FR-20240812-144207, Level-1_FR-20240812-151728

  • Level-4 ID(s): in progress

  • Setup: Setup since 2005

  • Instruments: R350, QCL

  • Scripts: bico v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9)

  • FLUXNET Upload: -

  • Notes:

Deprecated versions#

  • FF-202108 (IRGA75, deprecated) | Final Flux Version: FF-202108 | Level-1: Level-1_FR-20210809-121703 | Level-4 ID(s): Level-3-4_PI_dataset_2005-2020 | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: FR 0.5.0 with EddyPro 7.0.6, DIIVE v0.21.0, BICO 0.5.0 (binary conversion) | FLUXNET Upload: - | Notes: Differences to previous version: calculated with angle-of-attack correction; used file for dynamic vegetation height

  • FF-202101 (QCL, deprecated) | Final Flux Version: R350-QCL_FF-202101 | Level-1: Level-1_CH-CHA_FR-20210329-102017 / Level-1_CH-CHA_FR-20210329-110058 / Level-1_CH-CHA_FR-20210412-135410 | Level-4 ID(s): Level-3-4_PI_dataset_N2O_CH4_2019-2020 | Setup: Setup since 2005 | Instruments: R350, QCL | Scripts: FR 0.5.0 with EddyPro 7.0.6, DIIVE v0.21.0, BICO 0.5.0 (binary conversion) | FLUXNET Upload: - | Notes: -

  • FF-202008 (IRGA75, deprecated) | Final Flux Version: FF-202008 | Level-1: Level-1_ID2020-08-06T170629 | Level-4 ID(s): Level-3-4_FLUXNET-WW2020_RELEASE-2022-1_FN-20220209 | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: FCT v0.9.6 (Level-1 calcs), FQC v2.1.2 (Level-2 QC), Amp v0.16.0 | FLUXNET Upload: 17 Aug 2020 | Notes: First final flux calculations for 2019; For more info, see here: CH-CHA / FF-202008.

2018#

Fig. 12 Photo of the CH-CHA research site on 16 Nov 2018. Photo: Grassland Sciences Group, ETH Zurich#

FF-202407 (IRGA75)#

  • Final Flux Version: R350-IRGA75_FF-202407

  • Level-1: Level-1_FR-20240727-210213, Level-1_FR-20240730-112301, Level-1_FR-20240730-112310

  • Level-4 ID(s): in progress

  • Setup: Setup since 2005

  • Instruments: R350, IRGA75

  • Scripts: bico v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9)

  • FLUXNET Upload: -

  • Notes:

FF-202407 (QCL)#

  • Final Flux Version: R350-QCL_FF-202407

  • Level-1: Level-1_FR-20240812-141157, Level-1_FR-20240812-132901, Level-1_FR-20240812-120855

  • Level-4 ID(s): in progress

  • Setup: Setup since 2005

  • Instruments: R350, QCL

  • Scripts: bico v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9)

  • FLUXNET Upload: -

  • Notes:

Deprecated versions#

  • FF-202108 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-202108 | Level-1: Level-1_DIIVE-20210811-115925 | Level-4 ID(s): Level-3-4_PI_dataset_2005-2020 | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: FR 0.5.0 with EddyPro 7.0.6, DIIVE v0.21.0, BICO 0.5.0 (binary conversion) | FLUXNET Upload: - | Notes: Differences to previous version: calculated with angle-of-attack correction; used file for dynamic vegetation height

  • FF-202008 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-202008 | Level-1: Level-1-ID2020-08-09T035558 | Level-4 ID(s): Level-3-4_FLUXNET-WW2020_RELEASE-2022-1_FN-20220209 | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: FCT v0.9.6 (Level-1 calcs), FQC v2.1.2 (Level-2 QC), Amp v0.16.0 | FLUXNET Upload: ICOS Winter 2020 Initiative (original upload 9 Aug 2020) | Notes: Fluxes 2018 were re-calculated because the years around it were newly calculated, to make the most recent years more homogeneous; For more info, see here: CH-CHA / FF-202008.

  • FF-201902 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-201902 | Level-1: Level-1_ID2019-03-01T191002 / merged from: 2018_1: ID2019-02-27T155640, 2018_2:  ID2019-03-01T165849, 2018_3: ID2019-03-01T170012 / separate conversions: 2018_1 in ID2019-02-13T180423, 2018_2 in ID2019-03-01T152305, 2018_3 in ID2019-02-28T181358) | Level-4 ID(s): Level-3-4_FLUXNET2015-FN-20190606-beta-3 | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: FCT 0.86 (2018_1 and 2018_3), FCT 0.87 (2018_2 because of different QCL setup), EP 6.2.0 (Level-1), FM 0.91 (Level-1 merging), FQC 1.04 (Level-2) | FLUXNET Upload: European Drought Study 2018 (upload 29 Mar 2019) | Notes: -

2017#

General info#

Calibration gas issue#

Due to the IRGA75 replacement on 15 Mar 2017, only a short time period of approx. 2 months is affected by the wrong calibration gas. Affected time period: all IRGA75 CO2 concentrations between 2017011114.C57 and 2017031507.C00. For more info see here.

The problem: CO2 standards, measured at 15.07.2016 were off by 10-15 ppm. We measured the flasks at EMPA (CZ) on 07/03/2019 and found roughly 14 ppm difference (see below). After knowing this, I contacted ML and he immediately found the problem: the calibration was done using a cubic calibration function (UniBe1) instead of a linear one (UniBe2). This resulted in approx 12 ppm difference. Considering the “wrong” air matrix of the synthetic air (only 20% O2, no Ar), the EMPA measurements are roughly 1 ppm underestimated. This leads to a difference of approx 1.5 ppm between EMPA and UniBe2.

Conclusion: UniBe2 are the correct concentrations; we calibrated with the wrong concentrations (UniBe1) at the dates in the table below

Erroneous flasks

Flask

EMPA

UniBe1

Diff

Factor

UniBe2

Factor

10748329

447.19

461.195

14.005

1.0313

449.064

0.974

10754002

447.54

461.791

14.251

1.0318

449.607

0.974

10692738

444.83

458.434

13.604

1.0306

446.597

0.974

Calibrations with the wrong standards

Date

Instr

SN

Flask

Meas

Comment

11 Jan 2017

LI-7500

75H-0639

10748329

EC

calibration file found

15 Mar 2017

LI-7500

EC

replacement instrument from CH-OE2, was calibrated before with correct calibration gas

14 Apr 2017

LI-7500

EC

again change of analyzer, was calibrated before with correct calibration gas

30 Apr 2019

LI-7500

75H-0639

EC

calibrated with correct calibration gas

  • Affected time period: all IRGA75 CO2 concentrations between 2017011114.C57 and 2017031507.C00.

  • Due to the replacement of in 15 Mar 2017, only a short time period of approx. 2 months is affected by the wrong calibration gas.

  • Affected time periods are also shown in EC Raw Binary Format (CH-CHA).

FF-202407 (IRGA75)#

FF-202407 (QCL)#

  • Final Flux Version: R350-QCL_FF-202407

  • Level-1: Level-1_FR-20240812-120855, Level-1_FR-20240809-162135

  • Level-4 ID(s): in progress

  • Setup: Setup since 2005

  • Instruments: R350, QCL

  • Scripts: bico v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9)

  • FLUXNET Upload: -

  • Notes:

Deprecated versions#

  • FF-202108 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-202108 | Level-1: Level-1_FR-20210809-112924 | Level-4 ID(s): Level-3-4_PI_dataset_2005-2020 | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: FR 0.5.0 with EddyPro 7.0.6, DIIVE v0.21.0, BICO 0.5.0 (binary conversion) | FLUXNET Upload: - | Notes: Differences to previous version: calculated with angle-of-attack correction

  • FF-202008 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-202008 | Level-1: Level-1_ID2020-08-06T141401 | Level-4 ID(s): Level-3-4_FLUXNET-WW2020_RELEASE-2022-1_FN-20220209 | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: FCT v0.9.6 (Level-1 calcs), FQC v2.1.2 (Level-2 QC), Amp v0.16.0 | FLUXNET Upload: ICOS Winter 2020 Initiative (original upload 9 Aug 2020) | Notes: Fluxes 2017 were re-calculated because of the Wrong Calibration Gas 2017; For more info, see here: CH-CHA / FF-202008.

  • FF-201902 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-201902 | Level-1: Level-1_ID2019-02-27T155352 / conversion in ID2019-02-12T172700 | Level-4 ID(s): Level-3-4_FLUXNET2015-FN-20190606-beta-3 | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: FCT 0.86, EP 6.2.0 (Level-1), FM 0.91 (Level-1 merging), FQC 1.04 (Level-2) | FLUXNET Upload: European Drought Study 2018 (upload 29 Mar 2019) | Notes: Known issues: Fluxes have not been corrected for the Wrong Calibration Gas 2017 issue (unknown at the time). See here for affected time periods: Setup since 2005. Affected time period: all IRGA75 CO2 concentrations between 2017011114.C57 and 2017031507.C00 (approx. 2 months).

2016#

General notes#

  • During this year, there was a major problem with the sonic starting in March and lasting throughout April. The exact time period is: remove fluxes between 2016-03-18 12:30:00 and 2016-05-03 07:00:00. During this time period, The sensible heat fluxes are off and are lost due to the spike flag during Level-2 quality control. Still, the IRGA75 provided continuous measurements throughout April, but the fluxes look noisy with large deviations. The spectral correction factors for CO2 (FC_SCF) during this period within range, although they have less spikes than the rest of the year. However, to be more on the safe side, the recommendation is to use the spectral assessment file of 2017, which has a similar setup, and to remove the time period detailed above.

FF-202407 (IRGA75)#

  • Final Flux Version: R350-IRGA75_FF-202407

  • Level-1: Level-1_FR-20240730-112320, Level-1_FR-20240730-112331

  • Level-4 ID(s): in progress

  • Setup: Setup since 2005

  • Instruments: R350, IRGA75

  • Scripts: bico v1.6.3 and v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9)

  • FLUXNET Upload: -

  • Notes:

FF-202407 (QCL)#

  • Final Flux Version: R350-QCL_FF-202407

  • Level-1: Level-1_FR-20240809-162135, Level-1_FR-20240812-122540

  • Level-4 ID(s): in progress

  • Setup: Setup since 2005

  • Instruments: R350, QCL

  • Scripts: bico v1.6.3 and v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9)

  • FLUXNET Upload: -

  • Notes:

Deprecated versions#

  • FF-201902 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-201902 | Level-1: Level-1_ID2019-03-01T193757 / merged from: 2016_1-3: ID2019-02-27T154133, 2016_2: ID2019-02-27T154512 / separate conversions: 2016_1, 2016_3 in ID2019-02-12T172410; 2016_2 in ID2019-02-12T172532 | Level-4 ID(s): Level-3-4_PI_dataset_2005-2020; Level-3-4_FLUXNET-WW2020_RELEASE-2022-1_FN-20220209; Level-3-4_FLUXNET2015-FN-20190606-beta-3 | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: FCT 0.86, EP 6.2.0 (Level-1), FM 0.91 (Level-1 merging), FQC 1.04 (Level-2) | FLUXNET Upload: European Drought Study 2018 (upload 29 Mar 2019) | Notes: For QC-20190310-130244, I leave the CO2 fluxes for April in the data, with the flag as provided by the default Level-2 QC check, but the fluxes during this time period need to be used (and if needed re-checked) with care, since I can see reasons to remove all fluxes for most of March and all of April. – LH

  • FF-XXXXXX (QCL, deprecated) | Final Flux Version: R350-QCL_FF-XXXXXX (vX) | Level-1: XXX | Level-4 ID(s): Level-3-4_FLUXNET-CH4-2020_V1_2012-2016 | Setup: Setup since 2005 | Instruments: R350, QCL | Scripts: FCT 0.74, EP 6.1.0 (Level-1), FM (Level-1 merging), FQC (Level-2) | FLUXNET Upload: FLUXNET-CH4 Community Product (upload X 2019) | Notes: data were shared with FLUXNET, but unclear which version

2015#

Fig. 13 Photo of the CH-CHA research site on 30 Jun 2015. Photo: Grassland Sciences Group, ETH Zurich#

FF-202407 (IRGA75)#

  • Final Flux Version: R350-IRGA75_FF-202407

  • Level-1: Level-1_FR-20240727-210058, Level-1_FR-20240727-210122

  • Level-4 ID(s): in progress

  • Setup: Setup since 2005

  • Instruments: R350, IRGA75

  • Scripts: bico v1.6.3 and v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9)

  • FLUXNET Upload: -

  • Notes:

FF-202407 (QCL)#

  • Final Flux Version: R350-QCL_FF-202407

  • Level-1: Level-1_FR-20240809-195140, Level-1_FR-20240809-195142

  • Level-4 ID(s): in progress

  • Setup: Setup since 2005

  • Instruments: R350, QCL

  • Scripts: bico v1.6.3 and v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9)

  • FLUXNET Upload: -

  • Notes:

Deprecated versions#

  • FF-201605 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-201605 (v2016-05) | Level-1: Level-1_ID2016-05-24T165022 / merged from: 2015_1: ID2016-05-23T124232, 2015_2: ID2016-05-22T000117 | Level-4 ID(s): Level-3-4_PI_dataset_2005-2020; Level-3-4_FLUXNET-WW2020_RELEASE-2022-1_FN-20220209; Level-3-4_FLUXNET2015-FN-20190606-beta-3 | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: FCT 0.74, EP 6.1.0 (Level-1), FM (Level-1 merging), FQC (Level-2) | FLUXNET Upload: FLUXNET2015 dataset (upload 4 Jun 2016) (a) | Notes: Although these fluxes were prepared for the original FLUXNET2015 release in 2016, they were not included in the dataset. Data were later included for the FLUXNET2015 Drought Study 2018. May 2016: [2005-2015] v2016-05 calculated with EddyPro 610, FluxCalc 0.74, Anaconda3 (Python) by LH. This run used the final meteo data, as checked by PK and KF. All EddyPro .processing files were newly setup for this run, to avoid legacy paths in the processing files that might mess with our results (e.g. there were spectral problems because EP could not find the spectral files). Run used slightly different settings: sonic height 2.41m, sonic north offset 7°

  • FF-201605 (QCL, deprecated) | Final Flux Version: R350-QCL_FF-201605 (v2016-05) | Level-1: Level-1_ID2016-06-07T103201 / merged from: 2015_1: ID2016-06-05T010130, 2015_2: ID2016-06-06T094455 | Level-4 ID(s): Level-3-4_FLUXNET-CH4-2020_V1_2012-2016 | Setup: Setup since 2005 | Instruments: R350, QCL | Scripts: FCT 0.74, EP 6.1.0 (Level-1), FM (Level-1 merging), FQC (Level-2) | FLUXNET Upload: FLUXNET-CH4 Community Product (upload 5 May 2019) | Notes: -

2014#

Fig. 14 Photo of the CH-CHA research site in April 2014. Photo: Lukas Hörtnagl, Grassland Sciences Group, ETH Zurich#

FF-202407 (IRGA75)#

FF-202407 (QCL)#

Deprecated versions#

  • FF-201605 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-201605 (v2016-05) | Level-1: Level-1_ID2016-05-22T000255 | Level-4 ID(s): Level-3-4_PI_dataset_2005-2020; Level-3-4_FLUXNET-WW2020_RELEASE-2022-1_FN-20220209; Level-3-4_FLUXNET2015-FN-20190606-beta-3; Level-3-4_FLUXNET2015-FN-20161021 | Setup: Setup since 2005| Instruments: R350, IRGA75 | Scripts: FCT 0.74, EP 6.1.0 (Level-1), FM (Level-1 merging), FQC (Level-2) | FLUXNET Upload: FLUXNET2015 dataset (upload 4 Jun 2016) | Notes: May 2016: [2005-2015] v2016-05 calculated with EddyPro 610, FluxCalc 0.74, Anaconda3 (Python) by LH. This run used the final meteo data, as checked by PK and KF. All EddyPro .processing files were newly setup for this run, to avoid legacy paths in the processing files that might mess with our results (e.g. there were spectral problems because EP could not find the spectral files). Run used slightly different settings: sonic height 2.41m, sonic north offset 7°

  • FF-201605 (QCL, deprecated) | Final Flux Version: R350-QCL_FF-201605 (v2016-05) | Level-1: Level-1_ID2016-06-05T010121 | Level-4 ID(s): Level-3-4_FLUXNET-CH4-2020_V1_2012-2016 | Setup: Setup since 2005 | Instruments: R350, QCL | Scripts: FCT 0.74, EP 6.1.0 (Level-1), FM (Level-1 merging), FQC (Level-2) | FLUXNET Upload: FLUXNET-CH4 Community Product (upload 5 May 2019) | Notes: -

2013#

Fig. 15 Photo of the CH-CHA research site on 7 Jun 2013. Photo: Grassland Sciences Group, ETH Zurich#

FF-202407 (IRGA75)#

FF-202407 (QCL)#

Deprecated versions#

  • FF-201605 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-201605 (v2016-05) | Level-1: Level-1_ID2016-05-22T000412 | Level-4 ID(s): Level-3-4_PI_dataset_2005-2020; Level-3-4_FLUXNET-WW2020_RELEASE-2022-1_FN-20220209; Level-3-4_FLUXNET2015-FN-20190606-beta-3; Level-3-4_FLUXNET2015-FN-20161021 | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: FCT 0.74, EP 6.1.0 (Level-1), FM (Level-1 merging), FQC (Level-2) | FLUXNET Upload: FLUXNET2015 dataset (upload 4 Jun 2016) | Notes: May 2016: [2005-2015] v2016-05 calculated with EddyPro 610, FluxCalc 0.74, Anaconda3 (Python) by LH. this run used the final meteo data, as checked by PK and KF. all EddyPro .processing files were newly setup for this run, to avoid legacy paths in the processing files that might mess with our results (e.g. there were spectral problems because EP could not find the spectral files). run used slightly different settings: sonic height 2.41m, sonic north offset 7°

  • FF-201605 (QCL, deprecated) | Final Flux Version: R350-QCL_FF-201605 (v2016-05) | Level-1: Level-1_ID2016-06-05T010109 | Level-4 ID(s): Level-3-4_FLUXNET-CH4-2020_V1_2012-2016 | Setup: Setup since 2005 | Instruments: R350, QCL | Scripts: FCT 0.74, EP 6.1.0 (Level-1), FM (Level-1 merging), FQC (Level-2) | FLUXNET Upload: FLUXNET-CH4 Community Product (upload 5 May 2019) | Notes: -

2012#

Fig. 16 Photo of the CH-CHA research site on 26 Jul 2012. Photo: Grassland Sciences Group, ETH Zurich#

General notes#

Erroneous data between 27 Feb 2012 08:00 and 16 Mar 2012 18:00: I checked the eddy covariance raw data plots (20Hz) and found:

  • 2012022702.b00 is the last complete raw data file before the gap, N2O and CH4 look good

  • 2012022708.b00 is the last complete raw data file before the gap, but N2O and CH4 measurements by the QCL are already faulty

  • 2012022714.b00 is the first incomplete raw data file already during the gap (N2O and CH4 completely missing)

  • 2012031602.b00 is the last incomplete raw data file already during the gap (N2O and CH4 completely missing)

  • 2012031614.b00 is the first complete raw data file after the gap, N2O and CH4 look good again after approx. 18:00h

  • 2012031620.b00 is the first complete raw data file after the gap, N2O and CH4 look good again

FF-202407 (IRGA75)#

  • Final Flux Version: R350-IRGA75_FF-202407

  • Level-1: Level-1_FR-20240728-190409, Level-1_FR-20240730-112342

  • Level-4 ID(s): in progress

  • Setup: Setup since 2005

  • Instruments: R350, IRGA75

  • Scripts: bico v1.6.3 and v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9)

  • FLUXNET Upload: -

  • Notes:

FF-202407 (QCL)#

  • Final Flux Version: R350-QCL_FF-202407

  • Level-1: Level-1_FR-20240731-175623

  • Level-4 ID(s): in progress

  • Setup: Setup since 2005

  • Instruments: R350, QCL

  • Scripts: bico v1.6.3 and v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9)

  • FLUXNET Upload: -

  • Notes:

Deprecated versions#

  • FF-201605 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-201605 (v2016-05) | Level-1: Level-1_ID2016-05-23T201124 / merged results from: 2012_1: ID2016-05-22T000702, 2012_2: ID2016-05-22T000537 | Level-4 ID(s): Level-3-4_PI_dataset_2005-2020; Level-3-4_FLUXNET-WW2020_RELEASE-2022-1_FN-20220209; Level-3-4_FLUXNET2015-FN-20190606-beta-3; Level-3-4_FLUXNET2015-FN-20161021 | Setup: Setup since 2005| Instruments: R350, IRGA75 | Scripts: FCT 0.74, EP 6.1.0 (Level-1), FM (Level-1 merging), FQC (Level-2) | FLUXNET Upload: FLUXNET2015 dataset (upload 4 Jun 2016) | Notes: May 2016: [2005-2015] v2016-05 calculated with EddyPro 610, FluxCalc 0.74, Anaconda3 (Python) by LH. this run used the final meteo data, as checked by PK and KF. all EddyPro .processing files were newly setup for this run, to avoid legacy paths in the processing files that might mess with our results (e.g. there were spectral problems because EP could not find the spectral files). run used slightly different settings: sonic height 2.41m, sonic north offset 7°

  • FF-201605 (QCL, deprecated) | Final Flux Version: R350-QCL_FF-201605 (v2016-05) | Level-1: Level-1_ID2016-05-26T115356 | Level-4 ID(s): Level-3-4_FLUXNET-CH4-2020_V1_2012-2016 | Setup: Setup since 2005 | Instruments: R350, QCL | Scripts: FCT 0.74, EP 6.1.0 (Level-1), FM (Level-1 merging), FQC (Level-2) | FLUXNET Upload: FLUXNET-CH4 Community Product (upload 5 May 2019) | Notes: -

2011#

FF-202407 (IRGA75)#

Deprecated versions#

  • FF-201605 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-201605 (v2016-05) | Level-1: Level-1_ID2016-05-23T145001 | Level-4 ID(s): Level-3-4_PI_dataset_2005-2020 | Level-3-4_FLUXNET-WW2020_RELEASE-2022-1_FN-20220209 | Level-3-4_FLUXNET2015-FN-20190606-beta-3 | Level-3-4_FLUXNET2015-FN-20161021 | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: FCT 0.74, EP 6.1.0 (Level-1), FM (Level-1 merging), FQC (Level-2) | FLUXNET Upload: FLUXNET2015 dataset (upload 4 Jun 2016) | Notes: May 2016: [2005-2015] v2016-05 calculated with EddyPro 610, FluxCalc 0.74, Anaconda3 (Python) by LH. this run used the final meteo data, as checked by PK and KF. all EddyPro .processing files were newly setup for this run, to avoid legacy paths in the processing files that might mess with our results (e.g. there were spectral problems because EP could not find the spectral files). run used slightly different settings: sonic height 2.41m, sonic north offset 7°

2010#

Fig. 17 Photo of the CH-CHA research site on 22 Sep 2010. Photo: Grassland Sciences Group, ETH Zurich#

FF-202407 (IRGA75)#

  • Final Flux Version: R350-IRGA75_FF-202407

  • Level-1: Level-1_FR-20240728-190324, Level-1_FR-20240730-112352

  • Level-4 ID(s): in progress

  • Setup: Setup since 2005

  • Instruments: R350, IRGA75

  • Scripts: bico v1.6.3 and v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9)

  • FLUXNET Upload: -

  • Notes:

Deprecated versions#

  • FF-201605 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-201605 (v2016-05) | Level-1: Level-1_ID2016-05-23T135737 / merged results from: 2010_1 and 2010_3: ID2016-05-22T001209, 2010_2: ID2016-05-22T001000 | Level-4 ID(s): Level-3-4_PI_dataset_2005-2020; Level-3-4_FLUXNET-WW2020_RELEASE-2022-1_FN-20220209; Level-3-4_FLUXNET2015-FN-20190606-beta-3; Level-3-4_FLUXNET2015-FN-20161021 | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: FCT 0.74, EP 6.1.0 (Level-1), FM (Level-1 merging), FQC (Level-2) | FLUXNET Upload: FLUXNET2015 dataset (upload 4 Jun 2016) | Notes: May 2016: [2005-2015] v2016-05 calculated with EddyPro 610, FluxCalc 0.74, Anaconda3 (Python) by LH. this run used the final meteo data, as checked by PK and KF. all EddyPro .processing files were newly setup for this run, to avoid legacy paths in the processing files that might mess with our results (e.g. there were spectral problems because EP could not find the spectral files). run used slightly different settings: sonic height 2.41m, sonic north offset 7°

2009#

General notes#

  • In 2008 and 2009, the sonic anemometer had problems, this can clearly be seen in the spectra of sonic T. There is something strange going on at high frequencies.

FF-202407 (IRGA75)#

  • Final Flux Version: R350-IRGA75_FF-202407

  • Level-1: Level-1_CH-CHA_FR-20240919-144235, Level-1_CH-CHA_FR-20240919-144503

  • Level-4 ID(s): in progress

  • Setup: Setup since 2005

  • Instruments: R350, IRGA75

  • Scripts: bico v1.6.5, fluxrun v1.4.1 (EddyPro v7.0.9)

  • FLUXNET Upload: -

  • Notes:

Deprecated versions#

  • FF-201605 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-201605 (v2016-05) | Level-1: Level-1_ID2016-06-04T135915 / merged results from: 2009_1 and 2009_3: ID2016-06-03T121445, 2009_2: ID2016-06-03T121522 | Level-4 ID(s): Level-3-4_PI_dataset_2005-2020; Level-3-4_FLUXNET-WW2020_RELEASE-2022-1_FN-20220209; Level-3-4_FLUXNET2015-FN-20190606-beta-3; Level-3-4_FLUXNET2015-FN-20161021 | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: FCT 0.74, EP 6.1.0 (Level-1), FM (Level-1 merging), FQC (Level-2) | FLUXNET Upload: FLUXNET2015 dataset (upload 4 Jun 2016) | Notes: May 2016: [2005-2015] v2016-05 calculated with EddyPro 610, FluxCalc 0.74, Anaconda3 (Python) by LH. this run used the final meteo data, as checked by PK and KF. all EddyPro .processing files were newly setup for this run, to avoid legacy paths in the processing files that might mess with our results (e.g. there were spectral problems because EP could not find the spectral files). run used slightly different settings: sonic height 2.41m, sonic north offset 7°. For this run, the spectral assessment file for 2011 was used to calculate fluxes for 2008 and 2009. This should give a more reliable result.

2008#

Fig. 18 Photo of the CH-CHA research site on 27 Jun 2008. Photo: Grassland Sciences Group, ETH Zurich#

General notes#

  • In 2008 and 2009, the sonic anemometer had problems, this can clearly be seen in the spectra of sonic T. There is something strange going on at high frequencies.

FF-202407 (IRGA75)#

Deprecated versions#

  • FF-201605 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-201605 (v2016-05) | Level-1: Level-1_ID2016-06-03T121335 | Level-4 ID(s): Level-3-4_PI_dataset_2005-2020; Level-3-4_FLUXNET-WW2020_RELEASE-2022-1_FN-20220209; Level-3-4_FLUXNET2015-FN-20190606-beta-3; Level-3-4_FLUXNET2015-FN-20161021 | Setup: Setup since 2005| Instruments: R350, IRGA75 | Scripts: FCT 0.74, EP 6.1.0 (Level-1), FQC (Level-2) | FLUXNET Upload: FLUXNET2015 dataset (upload 4 Jun 2016) | Notes: May 2016: [2005-2015] v2016-05 calculated with EddyPro 610, FluxCalc 0.74, Anaconda3 (Python) by LH. this run used the final meteo data, as checked by PK and KF. all EddyPro .processing files were newly setup for this run, to avoid legacy paths in the processing files that might mess with our results (e.g. there were spectral problems because EP could not find the spectral files). run used slightly different settings: sonic height 2.41m, sonic north offset 7°. For this run, the spectral assessment file for 2011 was used to calculate fluxes for 2008 and 2009. This should give a more reliable result.

2007#

FF-202407 (IRGA75)#

Deprecated versions#

  • FF-201605 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-201605 (v2016-05) | Level-1: Level-1_ID2016-05-23T194748 | Level-4 ID(s): Level-3-4_PI_dataset_2005-2020; Level-3-4_FLUXNET-WW2020_RELEASE-2022-1_FN-20220209; Level-3-4_FLUXNET2015-FN-20190606-beta-3; Level-3-4_FLUXNET2015-FN-20161021 | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: FCT 0.74, EP 6.1.0 (Level-1), FQC (Level-2) | FLUXNET Upload: FLUXNET2015 dataset (upload 4 Jun 2016) | Notes: May 2016: [2005-2015] v2016-05 calculated with EddyPro 610, FluxCalc 0.74, Anaconda3 (Python) by LH. this run used the final meteo data, as checked by PK and KF. all EddyPro .processing files were newly setup for this run, to avoid legacy paths in the processing files that might mess with our results (e.g. there were spectral problems because EP could not find the spectral files). run used slightly different settings: sonic height 2.41m, sonic north offset 7°

2006#

FF-202407 (IRGA75)#

Deprecated versions#

  • FF-201605 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-201605 (v2016-05) | Level-1: Level-1_ID2016-05-24T165540 | Level-4 ID(s): Level-3-4_PI_dataset_2005-2020; Level-3-4_FLUXNET-WW2020_RELEASE-2022-1_FN-20220209; Level-3-4_FLUXNET2015-FN-20190606-beta-3; Level-3-4_FLUXNET2015-FN-20161021 | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: FCT 0.74, EP 6.1.0 (Level-1), FQC (Level-2) | FLUXNET Upload: FLUXNET2015 dataset (upload 4 Jun 2016) | Notes: May 2016: [2005-2015] v2016-05 calculated with EddyPro 610, FluxCalc 0.74, Anaconda3 (Python) by LH. this run used the final meteo data, as checked by PK and KF. all EddyPro .processing files were newly setup for this run, to avoid legacy paths in the processing files that might mess with our results (e.g. there were spectral problems because EP could not find the spectral files). run used slightly different settings: sonic height 2.41m, sonic north offset 7°

2005#

FF-202407 (IRGA75)#

Deprecated versions#

  • FF-201605 (IRGA75, deprecated) | Final Flux Version: R350-IRGA75_FF-201605 (v2016-05) | Level-1: Level-1_ID2016-05-24T234642 | Level-4 ID(s): Level-3-4_PI_dataset_2005-2020; Level-3-4_FLUXNET-WW2020_RELEASE-2022-1_FN-20220209; Level-3-4_FLUXNET2015-FN-20190606-beta-3; Level-3-4_FLUXNET2015-FN-20161021 | Setup: Setup since 2005 | Instruments: R350, IRGA75 | Scripts: FCT 0.74, EP 6.1.0 (Level-1), FQC (Level-2) | FLUXNET Upload: FLUXNET2015 dataset (upload 4 Jun 2016) | Notes: May 2016: [2005-2015] v2016-05 calculated with EddyPro 610, FluxCalc 0.74, Anaconda3 (Python) by LH. this run used the final meteo data, as checked by PK and KF. all EddyPro .processing files were newly setup for this run, to avoid legacy paths in the processing files that might mess with our results (e.g. there were spectral problems because EP could not find the spectral files). run used slightly different settings: sonic height 2.41m, sonic north offset 7°

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