Natural and anthropogenic methane fluxes in Eurasia: a mesoscale quantification by generalized atmospheric inversion

摘要: Abstract. Eight surface observation sites providing quasi-continuous measurements of atmospheric methane mixing ratios have been operated since the mid-2000's in Siberia. For first time a single work, we assimilate 1 year these situ observations an inversion. Our objective is to quantify fluxes from anthropogenic and wetland sources at mesoscale Siberian lowlands for 2010. To do so, inquire about way inversion uses are constrained by sites. As inversions suffer mis-quantified uncertainties, follow recent innovations techniques use new approach which quantifies uncertainties more objectively than previous systems. We find that, due errors representation transport redundant pieces information, only one every few days found valuable The remaining high-resolution signal representative very local emission patterns difficult analyse with system. An analysis information also reveals that constrain emissions within radius 500 km. More ones currently operation then necessary whole lowlands. Still, areas quantified objectified uncertainties. Finally, tolerance intervals posterior roughly 20 % (resp. 50 %) wetland) sources. About 50–70 on average annual basis. Extrapolating figures lowlands, regional budget 5–28 TgCH4 2010, i.e. 1–5 global emissions. available region interest, total columns Greenhouse Gas Observing SATellite (GOSAT) tentatively used evaluation results, but they exhibit marginal interest.