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AMT | Articles | Volume 12, issue 2
Atmos. Meas. Tech., 12, 971–976, 2019
https://doi.org/10.5194/amt-12-971-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Meas. Tech., 12, 971–976, 2019
https://doi.org/10.5194/amt-12-971-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 13 Feb 2019

Research article | 13 Feb 2019

Possible errors in flux measurements due to limited digitalization

Thomas Foken et al.
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Cited articles  
Babel, W., Lüers, J., Hübner, J., Rebmann, C., Wichura, B., Thomas, C. K., Serafimovich, A., and Foken, T.: Long-term carbon and water vapour fluxes, in: Energy and Matter Fluxes of a Spruce Forest Ecosystem, Ecological Studies, Vol. 229, edited by: Foken, T., Springer, Cham, 73–96, https://doi.org/10.1007/978-3-319-49389-3_4, 2017. 
Baldocchi, D.: `Breathing' of the terrestrial biosphere: lessons learned from a global network of carbon dioxide flux measurement systems, Aust. J. Botany, 56, 1–26, https://doi.org/10.1071/BT07151, 2008. 
Baldocchi, D., Ryu, Y., and Keenan, T.: Terrestrial Carbon Cycle Variability [version 1; referees: 2 approved], F1000Research, 5(F1000 Faculty Rev), 2371, https://doi.org/10.12688/f1000research.8962.1, 2016. 
Foken, T.: Energy and Matter Fluxes of a Spruce Forest Ecosystem, Ecological Studies, Vol. 229, Springer Cham, XV, 532 pp., https://doi.org/10.1007/978-3-319-49389-3, 2017a. 
Foken, T.: Micrometeorology, 2nd ed., Springer, Berlin, Heidelberg, 362 pp., https://doi.org/10.1007/978-3-642-25440-6, 2017b. 
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Recently reported trends of carbon dioxide uptake pose the question of whether trends may be the result of the limited digitalization of gas analysers and sonic anemometers used in the 1990s. Modifying a 12 bit digitalization and the instrument error reported for the R2 and R3 sonic anemometers found elsewhere, the influence of these deficits in comparison to the now commonly used 16 bit digitalization were quantified. Both issues have an effect only on trace gas fluxes of small magnitude.
Recently reported trends of carbon dioxide uptake pose the question of whether trends may be the...
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