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ICOS eddy covariance flux-station site setup: a review

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Rebmann Corinna, Aubinet Marc, Schmid HaPe, Arriga Nicola, Aurela Mika, Burba George, Clement Robert, De Ligne Anne, Fratini Gerardo, Gielen Bert, Grace John, Graf Alexander, Gross Patrick, Haapanala Sami, Herbst Mathias, Hörtnagl Lukas, Ibrom Andreas, Joly Lilian, Kljun Natascha, Kolle Olaf, Kowalski Andrew, Lindroth Anders, Loustau Denis, Mammarella Ivan, et al. ,
Project ICOS-CH Phase 2
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Original article (peer-reviewed)

Journal International Agrophysics
Volume (Issue) 32(4)
Page(s) 471 - 494
Title of proceedings International Agrophysics
DOI 10.1515/intag-2017-0044

Open Access

URL http://doi.org/10.1515/intag-2017-0044
Type of Open Access Publisher (Gold Open Access)

Abstract

AbstractThe Integrated Carbon Observation System Research Infrastructure aims to provide long-term, continuous observations of sources and sinks of greenhouse gases such as carbon dioxide, methane, nitrous oxide, and water vapour. At ICOS ecosystem stations, the principal technique for measurements of ecosystem-atmosphere exchange of GHGs is the eddy-covariance technique. The establishment and setup of an eddy-covariance tower have to be carefully reasoned to ensure high quality flux measurements being representative of the investigated ecosystem and comparable to measurements at other stations. To fulfill the requirements needed for flux determination with the eddy-covariance technique, variations in GHG concentrations have to be measured at high frequency, simultaneously with the wind velocity, in order to fully capture turbulent fluctuations. This requires the use of high-frequency gas analysers and ultrasonic anemometers. In addition, to analyse flux data with respect to environmental conditions but also to enable corrections in the post-processing procedures, it is necessary to measure additional abiotic variables in close vicinity to the flux measurements. Here we describe the standards the ICOS ecosystem station network has adopted for GHG flux measurements with respect to the setup of instrumentation on towers to maximize measurement precision and accuracy while allowing for flexibility in order to observe specific ecosystem features.
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