Fig. 1.

A conceptual depiction of the emissions scaling protocol used to produce GCP-GridFED as described in section 2.2. Descriptions of the input datasets are provided in section 2.1. This figure does not depict the procedure used to calculate emissions uncertainty or O₂ combustion; however, the figure indicates the stages at which these additional outputs are produced within the CO₂ emissions scaling protocol (marked as ‘*’ and ‘#’, respectively). Uncertainties in CO₂ concentration are calculated for the EDGAR dataset in the year 2010 and scaled using the same factors as the central estimates for CO₂ emission. O₂ combustion estimates are calculated using oxidative ratios applied to the CO₂ emissions from fuel combustion, prior to the final step of the protocol. Full details of the procedure used to produce gridded CO₂ uncertainties and O₂ combustion estimates can be found in sections 2.3 and 2.4, respectively.