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

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Sabbatini Simone, Mammarella Ivan, Arriga Nicola, Fratini Gerardo, Graf Alexander, Hörtnagl Lukas, Ibrom Andreas, Longdoz Bernard, Mauder Matthias, Merbold Lutz, Metzger Stefan, Montagnani Leonardo, Pitacco Andrea, Rebmann Corinna, Sedlák Pavel, Šigut Ladislav, Vitale Domenico, Papale Dario,
Project ICOS-CH Phase 2
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Original article (peer-reviewed)

Journal International Agrophysics
Volume (Issue) 32(4)
Page(s) 495 - 515
Title of proceedings International Agrophysics
DOI 10.1515/intag-2017-0043

Open Access

URL http://doi.org/10.1515/intag-2017-0043
Type of Open Access Publisher (Gold Open Access)

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 CO 2 , 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 CO 2 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.
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