Methane emissions from trees planted on a closed landfill site.

Trees have morphological adaptations that allow methane (CH) generated below ground to bypass oxidation in aerobic surface soils. This natural phenomenon however has not been measured in a landfill context where planted trees may alter the composition and magnitude of CH fluxes from the surface. To address this research gap, we measured tree stem and soil greenhouse gas (GHG) emissions (CH and CO) from a closed UK landfill and comparable natural site, using an off-axis integrated cavity output spectroscopy analyser and flux chambers.