Articles | Volume 12, issue 4
https://doi.org/10.5194/bg-12-1205-2015
https://doi.org/10.5194/bg-12-1205-2015
Research article
 | 
25 Feb 2015
Research article |  | 25 Feb 2015

Uncertainty analysis of eddy covariance CO2 flux measurements for different EC tower distances using an extended two-tower approach

H. Post, H. J. Hendricks Franssen, A. Graf, M. Schmidt, and H. Vereecken

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Short summary
This study introduces an extension of the classical two-tower approach for uncertainty estimation of measured net CO2 fluxes (NEE). Because land surface properties cannot be assumed identical at two eddy covariance towers, a correction for systematic flux differences is proposed to be added to the classical weather filter. With this extension, the overestimation of NEE uncertainty due to systematic flux differences (which are assumed to increase with tower distance) can considerably be reduced.
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