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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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Hanna Post on behalf of the Authors (31 Oct 2014)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (03 Dec 2014) by Anna Michalak
RR by Ankur Desai (10 Dec 2014)
RR by Anonymous Referee #2 (10 Jan 2015)
ED: Publish subject to technical corrections (29 Jan 2015) by Anna Michalak
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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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