Fig. 2

Time series of (left column) annual CO₂ emissions (Gt CO₂ year⁻¹) and (right column) monthly fossil CO₂ emissions (Mt CO₂ day⁻¹) as estimated by GCP-GridFED. Uncertainties in CO₂ emissions are treated as 5% for Annex I nations and global, following the GCB uncertainty assessment³. (Top row) Total global emissions are disaggregated to (other rows) the top 4 emission regions. Crosses mark input data directly from GCB-NAE^3,33.