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

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00005904
URN to cite this document: urn:nbn:de:bvb:703-epub-5904-3

Title data

Jentzsch, Katharina ; Boike, Julia ; Foken, Thomas:
Importance of the Webb, Pearman, and Leuning (WPL) correction for the measurement of small CO2 fluxes.
In: Atmospheric Measurement Techniques. Vol. 14 (19 November 2021) Issue 11 . - pp. 7291-7296.
ISSN 1867-8548
DOI der Verlagsversion: https://doi.org/10.5194/amt-14-7291-2021

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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.

Further data

Item Type: Article in a journal
Keywords: WPL-correction; CO2 flux; open-path gas analyzer
DDC Subjects: 500 Science > 500 Natural sciences
500 Science > 530 Physics
500 Science > 550 Earth sciences, geology
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors > Professor Micrometeorology - Univ.-Prof. Dr. Thomas Foken
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors
Research Institutions
Research Institutions > Research Centres
Language: English
Originates at UBT: No
URN: urn:nbn:de:bvb:703-epub-5904-3
Date Deposited: 22 Nov 2021 09:37
Last Modified: 22 Nov 2021 09:37
URI: https://epub.uni-bayreuth.de/id/eprint/5904

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