Measuring methane emissions from a landfill using a cost-effective micrometeorological method

Details Measuring methane emissions from a landfill using a cost-effective micrometeorological method Measuring methane emissions from a landfill using a cost-effective micrometeorological method

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3219808l&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 19, CiteID L19808

Mathematics

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Biogeosciences: Anoxic And Hypoxic Environments (4802, 4834), Biogeosciences: Instruments And Techniques, Biogeosciences: Biosphere/Atmosphere Interactions (0315), Biogeosciences: Trace Gases

Scientific paper

Landfills are one of the largest sources of methane to the atmosphere, yet their emissions are seldom measured. This results in high uncertainties in national emission estimates. We developed a Flame Ionization Detector-based micrometeorological measurement system and tested it at a large municipal landfill in Finland. The technical characteristics of the system allowed use of the eddy covariance method, enabling emission monitoring at a much lower cost than employing a Tunable Diode Laser instrument, which we used as a reference. Combining methane and carbon dioxide flux measurements we were able to estimate the methane generation rate, gas collection efficiency and oxidation rate in the landfill surface layer. We showed that the oxidation fraction may differ significantly from the default value used in the IPCC emission modelling, and that high emission rates were observed in the active deposition areas of the landfill.

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