Fig. 3: Bottom-up and top-down estimates of global methane emissions from fossil fuel exploitation. | Nature Communications

Fig. 3: Bottom-up and top-down estimates of global methane emissions from fossil fuel exploitation.

From: National quantifications of methane emissions from fuel exploitation using high resolution inversions of satellite observations

Fig. 3: Bottom-up and top-down estimates of global methane emissions from fossil fuel exploitation.

Results from our work (thick black segment) are compared to bottom-up inventories and to other top-down estimates for different years. Bottom-up inventories include GFEI v25 and GFEI v141, which are based on UNFCCC national estimates, EDGARv6.042, CEDS v202155, ECLIPSE version 6b56, EDGAR v4.3.243, and US EPA 201257. Top-down estimates include Zhang et al.16, Lu et al.15, Qu et al.25, Maasakkers et al.12, Saunois et al.3,6, Turner et al.9, and Fraser et al.58. Isotopic studies include Schwietzke et al.59 and Chandra et al.60. (a) is for the total emissions from all fuel exploitation sectors. Fewer studies separate oil-gas and coal, shown in panels (b) and (c). Note differences in scales between panels. Top-down error estimates are either not reported or unrealistically low (<5%) (except Saunois et al.3,6 and Fraser et al.58), which can be found in Supplementary Table 3 for more details.

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