Journal article

On-farm beef cattle methane emissions measured with tracer-ratio and inverse-dispersion modelling techniques

Mei Bai, José I Velazco, Trevor W Coates, Frances A Phillips, Thomas K Flesch, Julian Hill, David G Mayer, Nigel W Tomkins, Roger S Hegarty, Deli Chen

Copernicus GmbH


Abstract. The development and validation of management practices to mitigate greenhouse gas (GHG) emissions from livestock requires accurate emission measurements. This study assessed the accuracy of a practical inverse dispersion (IDM) micrometeorological technique to quantify methane (CH4) emitted from a small cattle herd (16 animals) confined to a 63 × 60 m pen. The IDM technique calculates emissions from the increase in CH4 concentration measured downwind of the animals. Two types of open-path (OP) gas sensors were used to measure concentration in the IDM calculation: a Fourier transform infrared spectrometer (IDM-FTIR) or a CH4 Laser (IDM-Laser). The actual cattle emission rate was give..

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