Towards a standardized processing of net ecosystem exchange measured with eddy covariance technique : algorithms and uncertainly estimation

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http://hdl.handle.net/10138/162839

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Papale , D , Reichstein , M , Aubinet , M , Canfora , E , Bernhofer , C & Vesala , T 2006 , ' Towards a standardized processing of net ecosystem exchange measured with eddy covariance technique : algorithms and uncertainly estimation ' Biogeosciences , vol. 3 , no. 4 , pp. 571-583 . DOI: 10.5194/bg-3-571-2006

Julkaisun nimi: Towards a standardized processing of net ecosystem exchange measured with eddy covariance technique : algorithms and uncertainly estimation
Tekijä: Papale, D; Reichstein, M; Aubinet, M; Canfora, E; Bernhofer, C; Vesala, Timo
Muu tekijä: University of Helsinki, Ecosystem processes/ Jaana Bäck
Päiväys: 2006
Kieli: eng
Sivumäärä: 13
Kuuluu julkaisusarjaan: Biogeosciences
ISSN: 1726-4170
URI: http://hdl.handle.net/10138/162839
Tiivistelmä: Eddy covariance technique to measure CO2, water and energy fluxes between biosphere and atmosphere is widely spread and used in various regional networks. Currently more than 250 eddy covariance sites are active around the world measuring carbon exchange at high temporal resolution for different biomes and climatic conditions. In this paper a new standardized set of corrections is introduced and the uncertainties associated with these corrections are assessed for eight different forest sites in Europe with a total of 12 yearly datasets. The uncertainties introduced on the two components GPP (Gross Primary Production) and TER (Terrestrial Ecosystem Respiration) are also discussed and a quantitative analysis presented. Through a factorial analysis we find that generally, uncertainties by different corrections are additive without interactions and that the heuristic u(*)-correction introduces the largest uncertainty. The results show that a standardized data processing is needed for an effective comparison across biomes and for underpinning interannual variability. The methodology presented in this paper has also been integrated in the European database of the eddy covariance measurements.
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