Extended Data Fig. 6: Emissions estimates for eastern mainland China using a priori emissions distributed by population.

a–c, Estimated annual emissions of CFC-11 (a), CFC-12 (b) and CCl₄ (c) for eastern mainland China using a priori emissions distributed by population in space. The black line shows the mean estimate of the four inversion frameworks and the shading shows the estimates for each inversion within their one standard deviation or 68% uncertainty. Inventory-based estimates of emissions for all four gases from eastern mainland China (determined as the total Chinese emissions scaled by the fraction of the population, 35%, that reside in that part of the domain) are shown as a dashed line (including projected inventory values¹⁷ after 2014). For CCl₄, the black symbols show additional bottom-up estimates, shown by a dotted line and black squares with the associated 95% uncertainty²¹; and by the black diamond¹⁶, also scaled by population. The derived emissions are consistent with those derived in the main text, which assume a priori emissions that are spatially uniform over land.