TY - JOUR
T1 - Evaluation of a plot-scale methane emission model using eddy covariance observations and footprint modelling
AU - Budishchev, A.
AU - Mi, Y.
AU - van Huissteden, J.
AU - Belelli-Marchesini, L.
AU - Schaepman-Strub, G.
AU - Parmentier, F.J.W.
AU - Fratini, M.
AU - Gallagher, A.
AU - Maximov, T.C.
AU - Dolman, A.J.
PY - 2014
Y1 - 2014
N2 - Most plot-scale methane emission models - of which many have been developed in the recent past - are validated using data collected with the closed-chamber technique. This method, however, suffers from a low spatial representativeness and a poor temporal resolution. Also, during a chamber-flux measurement the air within a chamber is separated from the ambient atmosphere, which negates the influence of wind on emissions. Additionally, some methane models are validated by upscaling fluxes based on the area-weighted averages of modelled fluxes, and by comparing those to the eddy covariance (EC) flux. This technique is rather inaccurate, as the area of upscaling might be different from the EC tower footprint, therefore introducing significant mismatch. In this study, we present an approach to validate plot-scale methane models with EC observations using the footprint-weighted average method. Our results show that the fluxes obtained by the footprint-weighted average method are of the same magnitude as the EC flux. More importantly, the temporal dynamics of the EC flux on a daily timescale are also captured (r
AB - Most plot-scale methane emission models - of which many have been developed in the recent past - are validated using data collected with the closed-chamber technique. This method, however, suffers from a low spatial representativeness and a poor temporal resolution. Also, during a chamber-flux measurement the air within a chamber is separated from the ambient atmosphere, which negates the influence of wind on emissions. Additionally, some methane models are validated by upscaling fluxes based on the area-weighted averages of modelled fluxes, and by comparing those to the eddy covariance (EC) flux. This technique is rather inaccurate, as the area of upscaling might be different from the EC tower footprint, therefore introducing significant mismatch. In this study, we present an approach to validate plot-scale methane models with EC observations using the footprint-weighted average method. Our results show that the fluxes obtained by the footprint-weighted average method are of the same magnitude as the EC flux. More importantly, the temporal dynamics of the EC flux on a daily timescale are also captured (r
U2 - 10.5194/bg-11-4651-2014
DO - 10.5194/bg-11-4651-2014
M3 - Article
SP - 4651
EP - 4664
JO - Biogeosciences
JF - Biogeosciences
SN - 1726-4170
IS - 11
M1 - 17
ER -
