Measuring landfills CH4 emission with aircraft, eddy covariance and chambers tecniques

We report on the combination of multiple techniques (aircraft, eddy covariance and chambers) to assess CH4 emissions of several landfills in Italy. Chambers were able to characterize the spatial variability of the continuum of the landfill but not the presence of preferred localized fugitive emissions. The deploying of light aircraft and payloads in remote access areas to characterize large-scale emissions with the presence of multiple sources supported measures in areas not covered by the eddy covariance tower footprint. Landfills emissions where biogas extraction was present were on average an order smaller than landfill without any extraction, demonstrating the benefit of biogas extraction not only in terms of energy production but also of avoided GHGs emissions.