Tracing sources of atmospheric methane using clumped isotopes.

ABSTRACT: We apply a recently developed measurement technique for methane (CH₄) isotopologues^* (isotopic variants of CH₄-¹³CH₄, ¹²CH₃D, ¹³CH₃D, and ¹²CH₂D₂) to identify contributions to the atmospheric burden from fossil fuel and microbial sources. The aim of this study is to constrain factors that ultimately control the concentration of this potent greenhouse gas on global, regional, and local levels. While predictions of atmospheric methane isotopologues have been modeled, we present direct measurements that point to a different atmospheric methane composition and to a microbial flux with less clumping (greater deficits relative to stochastic) in both

SUBMITTER: Haghnegahdar MA 

PROVIDER: S-EPMC10666091 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature