Fig. 2 Comparison of results with previous site-level studies. a Comparison of this study ’ s aggregate estimate of United States 2015 CH 4 emissions from the oil and natural gas production-segment (mean of Monte Carlo uncertainty realizations) with site-level results of Alvarez et al. (see Table S3 in 13 minus contributions from offshore platforms and abandoned wells) and the Greenhouse Gas Inventory 25 including fraction estimated from super-emitters (top 5% of sources). Error bars re fl ect the 95% con fi dence interval based on the 2.5 and 97.5 percentile values extracted from the empirical distributions. We also compare probability distributions of our component-level simulations (red lines), aggregated into site-level emissions, with site-level results of Omara (blue line): b Cumulative distribution plot (CDF) describing the fraction of well-sites with emissions below a given amount, and ( c ) probability distribution of emissions rate per well-site with the mean ( fi lled square), median (x), and 95% con fi dence intervals shown above the plots. Results of this study are presented using 100 Monte Carlo simulations. Because of the large number of sampled sites, the Monte Carlo simulations all converge toward the same size distribution in panels ( b ) and ( c