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Eddy covariance raw data processing for CO2 and energy fluxes calculation at ICOS ecosystem stations

Authors: Sabbatini S; Mammarella I; Arriga N; Fratini G; Graf A; Hörtnagl L; Ibrom A; +11 Authors

Eddy covariance raw data processing for CO2 and energy fluxes calculation at ICOS ecosystem stations

Abstract

Abstract The eddy covariance is a powerful technique to estimate the surface-atmosphere exchange of different scalars at the ecosystem scale. The EC method is central to the ecosystem component of the Integrated Carbon Observation System, a monitoring network for greenhouse gases across the European Continent. The data processing sequence applied to the collected raw data is complex, and multiple robust options for the different steps are often available. For Integrated Carbon Observation System and similar networks, the standardisation of methods is essential to avoid methodological biases and improve comparability of the results. We introduce here the steps of the processing chain applied to the eddy covariance data of Integrated Carbon Observation System stations for the estimation of final CO2, water and energy fluxes, including the calculation of their uncertainties. The selected methods are discussed against valid alternative options in terms of suitability and respective drawbacks and advantages. The main challenge is to warrant standardised processing for all stations in spite of the large differences in e.g. ecosystem traits and site conditions. The main achievement of the Integrated Carbon Observation System eddy covariance data processing is making CO2 and energy flux results as comparable and reliable as possible, given the current micrometeorological understanding and the generally accepted state-of-the-art processing methods.

Countries
Finland, France, Switzerland, Germany, Italy, Denmark, Germany, Germany, France, Belgium
Keywords

FOOTPRINT PREDICTION, 550, FREQUENCY-RESPONSE CORRECTIONS, biosphere-atmosphere exchange, UNCERTAINTY, turbulent fluxes, 630, CARBON, ATTENUATION, ICOS; protocol; method standardisation, SONIC ANEMOMETER, greenhouse gases, protocol, EXCHANGE, Biology, PART II, info:eu-repo/classification/ddc/550, ddc:550, method standardisation, Environmental sciences, Earth sciences, climate change, ICOS, WATER-VAPOR, BALANCE, ICOS; method standardisation; biosphere-atmosphere exchange; turbulent fluxes; protocol, info:eu-repo/classification/ddc/640

  • BIP!
    Impact byBIP!
    citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    87
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 1%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Top 1%
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
87
Top 1%
Top 10%
Top 1%
Green
gold