Towards a standardized processing of Net Ecosystem Exchange measured with eddy covariance technique: algorithms and uncertainty estimation
Author(s)
Papale, Dario
Date Issued
2006
Type
Article
Abstract
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
Citation
PAPALE D., REICHSTEIN M, AUBINET M, CANFORA E, BERNHOFER C, LONGDOZ B, KUTSCH W, RAMBAL S, VALENTINI R, VESALA T, YAKIR D (2006). Towards a standardized processing of Net Ecosystem Exchange measured with eddy covariance technique: algorithms and uncertainty estimation. BIOGEOSCIENCES, vol. 3; p. 571-583, ISSN: 1726-4170
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