Importance of the Webb, Pearman, and Leuning (WPL) correction for the measurement of small CO2 fluxes


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katharina.jentzsch [ at ] awi.de

Abstract

The WPL (Webb, Pearman, and Leuning) correction is fully accepted to correct trace gas fluxes like CO2 for density fluctuations due to water vapour and temperature fluctuations for open-path gas analysers. It is known that this additive correction can be on the order of magnitude of the actual flux. However, this is hardly ever included in the analysis of data quality. An example from the Arctic shows the problems, because the size of the correction is a multiple of the actual flux. As a general result, we examined and tabulated the magnitude of the WPL correction for carbon dioxide flux as a function of sensible and latent heat flux. Furthermore, we propose a parameter to better estimate possible deficits in data quality and recommend integrating the quality flag derived with this parameter into the general study of small carbon dioxide fluxes.



Item Type
Article
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Helmholtz Cross Cutting Activity (2021-2027)
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Peer revision
Peer-reviewed, Web of Science / Scopus
Publication Status
Published
Eprint ID
54992
DOI 10.5194/amt-14-7291-2021

Cite as
Jentzsch, K. , Boike, J. and Foken, T. (2021): Importance of the Webb, Pearman, and Leuning (WPL) correction for the measurement of small CO2 fluxes , Atmospheric Measurement Techniques, 14 (11), pp. 7291-7296 . doi: 10.5194/amt-14-7291-2021


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Arctic Land Expeditions > NO-Land_2009_Bayelva
Arctic Land Expeditions > NO-Land_2010_Bayelva
Arctic Land Expeditions > NO-Land_2011_Bayelva
Arctic Land Expeditions > NO-Land_2012_Bayelva
Arctic Land Expeditions > NO-Land_2013_Bayelva
Arctic Land Expeditions > NO-Land_2014_Bayelva
Arctic Land Expeditions > NO-Land_2015_Bayelva
Arctic Land Expeditions > NO-Land_2016_Bayelva
Arctic Land Expeditions > NO-Land_2017_Bayelva


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