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- W4311532434 abstract "Abstract. We have constructed an atmospheric inversion framework based on TM5-4DVAR to jointly assimilate measurements of methane and δ13C of methane in order to estimate source-specific methane emissions. Here we present global emission estimates from this framework for the period 1999–2016. We assimilate a newly constructed, multi-agency database of CH4 and δ13C measurements. We find that traditional CH4-only atmospheric inversions are unlikely to estimate emissions consistent with atmospheric δ13C data, and assimilating δ13C data is necessary to derive emissions consistent with both measurements. Our framework attributes ca. 85 % of the post-2007 growth in atmospheric methane to microbial sources, with about half of that coming from the tropics between 23.5∘ N and 23.5∘ S. This contradicts the attribution of the recent growth in the methane budget of the Global Carbon Project (GCP). We find that the GCP attribution is only consistent with our top-down estimate in the absence of δ13C data. We find that at global and continental scales, δ13C data can separate microbial from fossil methane emissions much better than CH4 data alone, and at smaller scales this ability is limited by the current δ13C measurement coverage. Finally, we find that the largest uncertainty in using δ13C data to separate different methane source types comes from our knowledge of atmospheric chemistry, specifically the distribution of tropospheric chlorine and the isotopic discrimination of the methane sink." @default.
- W4311532434 created "2022-12-26" @default.
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- W4311532434 date "2022-12-05" @default.
- W4311532434 modified "2023-10-18" @default.
- W4311532434 title "Estimating emissions of methane consistent with atmospheric measurements of methane and <i>δ</i><sup>13</sup>C of methane" @default.
- W4311532434 cites W138271575 @default.
- W4311532434 cites W1493509693 @default.
- W4311532434 cites W1505655419 @default.
- W4311532434 cites W1888540468 @default.
- W4311532434 cites W1901718912 @default.
- W4311532434 cites W1930957548 @default.
- W4311532434 cites W1966877204 @default.
- W4311532434 cites W1970576121 @default.
- W4311532434 cites W1986256308 @default.
- W4311532434 cites W1991391147 @default.
- W4311532434 cites W1997397718 @default.
- W4311532434 cites W1997468834 @default.
- W4311532434 cites W1998515817 @default.
- W4311532434 cites W2001442432 @default.
- W4311532434 cites W2004277964 @default.
- W4311532434 cites W2013562114 @default.
- W4311532434 cites W2015565958 @default.
- W4311532434 cites W2017616744 @default.
- W4311532434 cites W2022065127 @default.
- W4311532434 cites W2028718228 @default.
- W4311532434 cites W2028938077 @default.
- W4311532434 cites W2039731403 @default.
- W4311532434 cites W2052259821 @default.
- W4311532434 cites W2056589942 @default.
- W4311532434 cites W2059849751 @default.
- W4311532434 cites W2063196965 @default.
- W4311532434 cites W2068676456 @default.
- W4311532434 cites W2070093285 @default.
- W4311532434 cites W2071843144 @default.
- W4311532434 cites W2080352613 @default.
- W4311532434 cites W2082665463 @default.
- W4311532434 cites W2095425067 @default.
- W4311532434 cites W2097441736 @default.
- W4311532434 cites W2098366116 @default.
- W4311532434 cites W2099161036 @default.
- W4311532434 cites W2099743344 @default.
- W4311532434 cites W2100256561 @default.
- W4311532434 cites W2104355414 @default.
- W4311532434 cites W2110795813 @default.
- W4311532434 cites W2116091765 @default.
- W4311532434 cites W2117686912 @default.
- W4311532434 cites W2124421428 @default.
- W4311532434 cites W2125387407 @default.
- W4311532434 cites W2131491776 @default.
- W4311532434 cites W2134198306 @default.
- W4311532434 cites W2135073935 @default.
- W4311532434 cites W2144257125 @default.
- W4311532434 cites W2151005471 @default.
- W4311532434 cites W2167000970 @default.
- W4311532434 cites W2169275263 @default.
- W4311532434 cites W2169825433 @default.
- W4311532434 cites W2189992044 @default.
- W4311532434 cites W2302060977 @default.
- W4311532434 cites W2325510615 @default.
- W4311532434 cites W2521005534 @default.
- W4311532434 cites W2522099617 @default.
- W4311532434 cites W2524578103 @default.
- W4311532434 cites W2528367698 @default.
- W4311532434 cites W2551689139 @default.
- W4311532434 cites W2573821892 @default.
- W4311532434 cites W2605478487 @default.
- W4311532434 cites W2605885815 @default.
- W4311532434 cites W2625255878 @default.
- W4311532434 cites W2749447601 @default.
- W4311532434 cites W2774881380 @default.
- W4311532434 cites W2788396641 @default.
- W4311532434 cites W2793748751 @default.
- W4311532434 cites W2794985864 @default.
- W4311532434 cites W2807135495 @default.
- W4311532434 cites W2810386197 @default.
- W4311532434 cites W2886946511 @default.
- W4311532434 cites W2887319925 @default.
- W4311532434 cites W2889974037 @default.
- W4311532434 cites W2897061907 @default.