{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["13(1)"],"submitter":["Cheng CH"],"pubmed_abstract":["We estimate the causal contributions of spatiotemporal changes in temperature (T) and precipitation (Pr) to changes in Earth's atmospheric methane concentration (C<sub>CH4</sub>) and its isotope ratio δ<sup>13</sup>CH<sub>4</sub> over the last four decades. We identify oscillations between positive and negative feedbacks, showing that both contribute to increasing C<sub>CH4</sub>. Interannually, increased emissions via positive feedbacks (e.g. wetland emissions and wildfires) with higher land surface air temperature (LSAT) are often followed by increasing C<sub>CH4</sub> due to weakened methane sink via atmospheric <sup>•</sup>OH, via negative feedbacks with lowered sea surface temperatures (SST), especially in the tropics. Over decadal time scales, we find alternating rate-limiting factors for methane oxidation: when C<sub>CH4</sub> is limiting, positive methane-climate feedback via direct oceanic emissions dominates; when <sup>•</sup>OH is limiting, negative feedback is favoured. Incorporating the interannually increasing C<sub>CH4</sub> via negative feedbacks gives historical methane-climate feedback sensitivity ≈ 0.08 W m<sup>-2</sup> °C<sup>-1</sup>, much higher than the IPCC AR6 estimate."],"journal":["Nature communications"],"pagination":["3592"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC9226131"],"repository":["biostudies-literature"],"pubmed_title":["Impact of interannual and multidecadal trends on methane-climate feedbacks and sensitivity."],"pmcid":["PMC9226131"],"pubmed_authors":["Cheng CH","Redfern SAT"],"additional_accession":[]},"is_claimable":false,"name":"Impact of interannual and multidecadal trends on methane-climate feedbacks and sensitivity.","description":"We estimate the causal contributions of spatiotemporal changes in temperature (T) and precipitation (Pr) to changes in Earth's atmospheric methane concentration (C<sub>CH4</sub>) and its isotope ratio δ<sup>13</sup>CH<sub>4</sub> over the last four decades. We identify oscillations between positive and negative feedbacks, showing that both contribute to increasing C<sub>CH4</sub>. Interannually, increased emissions via positive feedbacks (e.g. wetland emissions and wildfires) with higher land surface air temperature (LSAT) are often followed by increasing C<sub>CH4</sub> due to weakened methane sink via atmospheric <sup>•</sup>OH, via negative feedbacks with lowered sea surface temperatures (SST), especially in the tropics. Over decadal time scales, we find alternating rate-limiting factors for methane oxidation: when C<sub>CH4</sub> is limiting, positive methane-climate feedback via direct oceanic emissions dominates; when <sup>•</sup>OH is limiting, negative feedback is favoured. Incorporating the interannually increasing C<sub>CH4</sub> via negative feedbacks gives historical methane-climate feedback sensitivity ≈ 0.08 W m<sup>-2</sup> °C<sup>-1</sup>, much higher than the IPCC AR6 estimate.","dates":{"release":"2022-01-01T00:00:00Z","publication":"2022 Jun","modification":"2024-10-16T17:32:16.534Z","creation":"2024-10-16T17:32:16.534Z"},"accession":"S-EPMC9226131","cross_references":{"pubmed":["35739128"],"doi":["10.1038/s41467-022-31345-w"]}}