Standardisation of eddy-covariance flux measurements of methane and nitrous oxide

Nemitz, E.; Mammarella, I.; Ibrom, A.; Aurela, M.; Burba, G. G.; Dengel, S.; Gielen, B.; Grelle, A.; Heinesch, Bernard; Herbst, M.; Hörtnagl, L.; Klemedtsson, L.; Lindroth, A.; Lohila, A.; McDermitt, D. K.; Meier, P.; Merbold, L.; Nelson, D.; Nicolini, G.; Nilsson, M. B.; Peltola, O.; Rinne, J.; Zahniser, M.

doi:10.1515/intag-2017-0042

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Standardisation of eddy-covariance flux measurements of methane and nitrous oxide

Nemitz, E.; Mammarella, I.; Ibrom, A. et al.

2018 • In International Agrophysics, 32 (4), p. 517-549

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10.1515/intag-2017-0042

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[en] Commercially available fast-response analysers for methane (CH4) and nitrous oxide (N2O) have recently become more sensitive, more robust and easier to operate. This has made their application for long-Term flux measurements with the eddy-covariance method more feasible. Unlike for carbon dioxide (CO2) and water vapour (H2O), there have so far been no guidelines on how to optimise and standardise the measurements. This paper reviews the state-of-The-Art of the various steps of the measurements and discusses aspects such as instrument selection, setup and maintenance, data processing as well as the additional measurements needed to aid interpretation and gap-filling. It presents the methodological protocol for eddy covariance measurements of CH4 and N2O fluxes as agreed for the ecosystem station network of the pan-European Research Infrastructure Integrated Carbon Observation System and provides a first international standard that is suggested to be adopted more widely. Fluxes can be episodic and the processes controlling the fluxes are complex, preventing simple mechanistic gap-filling strategies. Fluxes are often near or below the detection limit, requiring additional care during data processing. The protocol sets out the best practice for these conditions to avoid biasing the results and long-Term budgets. It summarises the current approach to gap-filling. © 2018 Eiko Nemitz et al., published by Sciendo 2018.

Disciplines :

Agriculture & agronomy

Author, co-author :

Nemitz, E.; Centre for Ecology and Hydrology, Bush Estate, Penicuik, EH26 0QB, United Kingdom

Mammarella, I.; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 68FI-00014, Finland

Ibrom, A.; Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet, Lyngby, 2800, Denmark

Aurela, M.; Finnish Meteorological Institute, P.O. Box 503, Helsinki, 00101, Finland

Burba, G. G.; RandD, LI-COR Biosciences, Lincoln, Nebraska, NE 68504, United States, Bio-Atmospheric Sciences, University of Nebraska, Lincoln, Nebraska, NE 68508, United States

Dengel, S.; Climate Sciences, Lawrence Berkeley National Laboratory, One Cyclotron Rd, Berkeley, CA 94720, United States

Gielen, B.; Research Centre of Excellence Plants and Ecosystems (PLECO), University of Antwerp, Wilrijk, Belgium

Grelle, A.; Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, SE-750 07, Sweden

Heinesch, Bernard ; Université de Liège - ULiège > Ingénierie des biosystèmes (Biose) > Biosystems Dynamics and Exchanges

Herbst, M.; Zentrum für Agrarmeteorologische Forschung Braunschweig (ZAMF), Deutscher Wetterdienst, Bundesallee 50, Braunschweig, 38116, Germany

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Language :

English

Title :

Standardisation of eddy-covariance flux measurements of methane and nitrous oxide

Publication date :

2018

Journal title :

International Agrophysics

ISSN :

0236-8722

eISSN :

2300-8725

Publisher :

Sciendo

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Issue :

Pages :

517-549

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Peer Reviewed verified by ORBi

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