CH-OE2 FP2017 (2004-2016)

Contents

1 Flux Products
2 Description
3 Key Stats
4 Dataset Production
5 Known Issues
6 References

Flux Products

FP2017
Identifier: ID20170612162243

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

CH-OE2: Fluxes NEE 2004-2016 (variable: NEEdespiked_WithUstar_f) in g C m-2.

CH-OE2: Mean fluxes of NEE 2004-2016 (variable: NEEdespiked_WithUstar_f) in g C m-2, shown in 20×20 classes of short-wave incoming radiation (SW_IN) and air temperature (TA). The plot was generated from 227952 half-hourly NEE fluxes.

Description

PI flux product (FP) of CH-OE2 ecosystem flux and meteo data over 13 years between 2004-2016, calculated for FLUXNET uploads and CE manuscripts.

Key Stats

Complete gap-filled years: 13
Available measured values: NEEdespiked_WithUstar_f: 47.8% measured / 52.2% gap-filled (after all quality checks, outlier removal, ustar threshold application and instrument failure)
Available data after gap-filling: 227952 half-hourly fluxes (NEEdespiked_WithUstar_f)
Range of ustar thresholds: seasonal thresholds ranging between 0.01 m s^-1 (2017) and 0.13 m s^-1 (winter 2013/14), mean 0.08 m s^-1 (2004-2016)
Best estimate cumulative carbon uptake (2004-2016, 13 years): 1.60 kg C m^-2 (NEEdespiked_WithUstar_f), avg. 0.123 kg C m^-2 yr^-1
Carbon source / sink behavior: The site is a sink for CO2 in 10 of 13 complete years (NEEdespiked_WithUstar_f). This calculation does not take into account C import and export due to management activities.
- Sink: Highest uptake 433 gC m^-2 (2011)
- Source: Highest emission 833 gC m^-2 (2016)

Dataset Production

Info about flux levels can be found here: Flux Levels

Software

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

Setup

Setup since 2003

2004-2016: R350-IRGA75

USED FLUX VERSIONS

2004 R350-IRGA75_FF-201607 / Level-1_ID2016-07-11T173359
2005 R350-IRGA75_FF-201607 / Level-1_ID2016-07-11T153917
2006 R350-R2-IRGA75_FF-201607 / Level-1_ID2016-07-13T121544
2007 R350-IRGA75_FF-201607 / Level-1_ID2016-07-11T153948
2008 R350-IRGA75_FF-201607 / Level-1_ID2016-07-11T154001
2009 R350-IRGA75_FF-201607 / Level-1_ID2016-07-11T173438
2010 R350-IRGA75_FF-201607 / Level-1_ID2016-07-12T123721
2011 R350-IRGA75_FF-201607 / Level-1_ID2016-07-12T093553
2012 R350-IRGA75_FF-201607 / Level-1_ID2016-07-12T093608
2013 R350-IRGA75_FF-201607 / Level-1_ID2016-07-12T093629
2014 R350-IRGA75_FF-201607 / Level-1_ID2016-07-12T093736
2015 R350-IRGA75_FF-201607 / Level-1_ID2016-07-13T215619
2016 R350-HS100-IRGA75_FF-201703 / Level-1_ID2017-03-09T183625

Known Issues

VPD 2008 has offset.

References

Emmel, C., Winkler, A., Hörtnagl, L., Revill, A., Ammann, C., D’Odorico, P., Buchmann, N., & Eugster, W. (2018). Integrated management of a Swiss cropland is not sufficient to preserve its soil carbon pool in the long term. Biogeosciences, 15(17), 5377–5393. https://doi.org/10.5194/bg-15-5377-2018

Last Updated on 19 Feb 2024 21:43