Source: Analysis: What does revised methane data mean for the Paris Agreement? | Carbon Brief To come up with new estimates, the research team used the same formulae as the IPCC, but used more recent data on global agricultural practices, explains Dr Ghassem Asrar, a study author and director of the Joint Global Change Research Institute at the Pacific Northwest National Laboratory. He tells Carbon Brief: “Our revised estimates of global livestock methane emissions are larger than ones made using IPCC 2006 default information, but with significant variation among global regions. Global atmospheric concentrations of CH4 have been increasing steadily since 2007. Our revisions suggest that global methane emissions by livestock explain about one-half to three-fourths of this increase.” My understanding is the change comes from more accurate metrics. Earlier data has been revised with better observations. This means addressing mitigations as part of a total effort and not narrow, less effective actions. Bob Wilson
Source for paper: Revised methane emissions factors and spatially distributed annual carbon fluxes for global livestock | Carbon Balance and Management | Full Text One interesting side effect should show up in some climate models. With an 11% increase in agriculture methane, a more accurate number, some climate models should show an increase in predictive temperature. Bob Wilson
