Articles | Volume 15, issue 17
Biogeosciences, 15, 5473–5487, 2018
Biogeosciences, 15, 5473–5487, 2018
Research article
14 Sep 2018
Research article | 14 Sep 2018

Eddy covariance flux errors due to random and systematic timing errors during data acquisition

Gerardo Fratini et al.

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Cited articles

Aubinet, M., Vesala, T., and Papale, D.: Eddy Covariance: A Practical Guide to Measurement and Data Analysis, Springer, Dordrecht, the Netherlands, Heidelberg, Germany, London, UK, New York, USA, 460 pp., 2012. 
Baldocchi, D., Falge, E., Gu, L., Olson, R., Hollinger, D., Running, S., Anthoni, P., Bernhofer, C., Davis, K., Evans, R., Fuentes, J., Goldstein, A., Katul, G., Law, B., Lee, X., Malhi, Y., Meyers, T., Munger, W., Oechel, W., Paw U, K. T., Pilegaard, K., Schmid, H. P., Valentini, R., Verma, S., Vesala, T., Wilson, K., and Wofsy, S.: FLUXNET: A New Tool to Study the Temporal and Spatial Variability of Ecosystem-Scale Carbon Dioxide, Water Vapor, and Energy Flux Densities, B. Am. Meteorol. Soc., 82, 2415–2434,<2415:FANTTS>2.3.CO;2, 2001. 
Barnes, J. R.: Electronic System Design: Interference and Noise Control Techniques, Prentice-Hall Inc., Upper Saddle River, New Jersey, USA, 1987. 
Cheng, Y., Sayde, C., Li, Q., Basara, J., Selker, J., Tanner, E., and Gentine, P.: Failure of Taylor's hypothesis in the atmospheric surface layer and its correction for eddy-covariance measurements, Geophys. Res. Lett., 44, 4287–4295, 2017. 
Short summary
Using a simulation study and field data, we quantify the biases that can be introduced in fluxes measured by eddy covariance (EC) if the raw high-frequency data are affected by random and systematic timing misalignments. Our study was motivated by the increasingly widespread adoption of fully digital EC systems potentially subject to such timing errors. We found biases as large as 10 %. We further propose a test to evaluate EC data logging systems for their time synchronization capabilities.
Final-revised paper