Anthropogenic emission is the main contributor to the rise of atmospheric methane during 1993-2017.

ABSTRACT: Atmospheric methane (CH₄) concentrations have shown a puzzling resumption in growth since 2007 following a period of stabilization from 2000 to 2006. Multiple hypotheses have been proposed to explain the temporal variations in CH₄ growth, and attribute the rise of atmospheric CH₄ either to increases in emissions from fossil fuel activities, agriculture and natural wetlands, or to a decrease in the atmospheric chemical sink. Here, we use a comprehensive ensemble of CH₄ source estimates and isotopic δ¹³C-CH₄ source signature data to show that the resumption of CH₄ growth is most likely due to increased anthropogenic emissions. Our emission scenarios that have the fewest biases with respect to isotopic composition su

SUBMITTER: Zhang Z 

PROVIDER: S-EPMC9084358 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature