Spread of the inverse emission. Relative differences among the four inversion configurations (in % – averaged pairwise differences) representing the variability in the inverse emissions due to the transport fields, averaged over the two-month period. The assimilation of different meteorological data types impacts the inverse CO₂ emissions by up to 15% in the downtown area and around the beltway. Tower indices are similar to the site locations in Figure 8, except for Site 13 which was not operational in 2013. Note that numbers 1–12 indicate the tower locations as detailed in Figure 8 and two towers were not operational during the time period Oct 26–30. DOI: https://doi.org/10.1525/elementa.133.f11