CH-FRU FP2020 (2005-2019)

Contents

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

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.

Description

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

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 2005

2005-2019: R350-IRGA75

USED FLUX VERSIONS

2005 R350-IRGA75_FF-201606 / Level-1_ID2016-06-30T213909
2006 R350-IRGA75_FF-201606 / Level-1_ID2016-06-30T213921
2007 R350-IRGA75_FF-201606 / Level-1_ID2016-06-30T213928
2008 R350-IRGA75_FF-201606 / Level-1_ID2016-06-30T213932
2009 R350-IRGA75_FF-201606 / Level-1_ID2016-06-30T213938
2010 R350-IRGA75_FF-201606 / Level-1_ID2016-06-30T213944
2011 R350-IRGA75_FF-201606 / Level-1_ID2016-06-30T213950
2012 R350-IRGA75_FF-201606 / Level-1_ID2016-07-02T110901
2013 R350-IRGA75_FF-201606 / Level-1_ID2016-07-02T110910
2014 R350-IRGA75_FF-201606 / Level-1_ID2016-07-02T110920
2015 R350-IRGA75_FF-201606 / Level-1_ID2016-07-02T110929
2016 R350-IRGA75_FF-201902 / Level-1_ID2019-03-03T030144
2017 R350-IRGA75_FF-201902 / Level-1_ID2019-03-03T030355
2018 R350-IRGA75_FF-202005 / Level-1_ID2020-05-29T103526
2019 R350-IRGA75_FF-202005 / Level-1_ID2020-05-31T135334

Known Issues

References

Last Updated on 18 Feb 2024 21:59