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International Agrophysics

The Journal of Institute of Agrophysics of Polish Academy of Sciences

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Biases in methane chamber measurements in peatlands

R. Juszczak
  • Corresponding author
  • Meteorology Department, Poznań University of Life Sciences, Piątkowska 94, 60-649 Poznań, Poland
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Published Online: 2013-04-20 | DOI: https://doi.org/10.2478/v10247-012-0081-z


The paper presents results of CH4 emission measurements at peatland with the application of the dynamic chamber technique. The measurements were conducted in two types of chambers differing in shape, height, volume and technology used to assure their tightness. The study tested how the following factors: 1) forced chamber headspace mixing or its absence, 2) mistakes of the person conducting measurements, 3) improper application of linear technique for calculating CH4 fluxes, and 4) simulated air sampling typical for static chambers, influence the significance of errors and the underestimation rate of CH4 fluxes measured in situ. It was indicated that chamber headspace mixing allows estimating methane fluxes with a smaller error than in the case of measurements conducted without mixing, and CH4 fluxes in such conditions can be 47 to 58% higher (depending on the chamber type) than in a chamber without fans. Using dynamic chambers and a fast analyzer to measure methane fluxes allows shortening the methane measurement process to a few minutes. On the other hand, using static chambers for methane flux measurements may lead to 70% underestimation of the calculated flux.

Keywords: chamber measurements; methane; flux calculation method; biases in chamber measurements

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About the article

Published Online: 2013-04-20

Published in Print: 2013-03-01

Citation Information: International Agrophysics, Volume 27, Issue 2, Pages 159–168, ISSN (Print) 0236-8722, DOI: https://doi.org/10.2478/v10247-012-0081-z.

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