An observation-constrained assessment of the climate sensitivity and future trajectories of wetland methane emissions.

ABSTRACT: Wetlands are a major source of methane (CH4) and contribute between 30 and 40% to the total CH4 emissions. Wetland CH4 emissions depend on temperature, water table depth, and both the quantity and quality of organic matter. Global warming will affect these three drivers of methanogenesis, raising questions about the feedbacks between natural methane production and climate change. Until present the large-scale response of wetland CH4 emissions to climate has been investigated with land-surface models that have produced contrasting results. Here, we produce a novel global estimate of wetland methane emissions based on atmospheric inverse modeling of CH4 fluxes and observed temperature and precipitation. Our data-driven model suggests that by 2100, current emissions may increase by 50% to 80%

SUBMITTER: Koffi EN 

PROVIDER: S-EPMC7148105 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature