Methane Emissions in a Chemistry-Climate Model: Feedbacks and Climate Response.

ABSTRACT: Understanding the past, present, and future evolution of methane remains a grand challenge. Here we have used a hierarchy of models, ranging from simple box models to a chemistry-climate model (CCM), UM-UKCA, to assess the contemporary and possible future atmospheric methane burden. We assess two emission data sets for the year 2000 deployed in UM-UKCA against key observational constraints. We explore the impact of the treatment of model boundary conditions for methane and show that, depending on other factors, such as CO emissions, satisfactory agreement may be obtained with either of the CH₄ emission data sets, highlighting the difficulty in unambiguous choice of model emissions in a coupled chemistry model with strong feedbacks. The feedbacks in the CH₄-CO-OH syste

SUBMITTER: Heimann I 

PROVIDER: S-EPMC7685116 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature