Climate Sensitivity of Peatland Methane Emissions Mediated by Seasonal Hydrologic Dynamics.

ABSTRACT: Peatlands are among the largest natural sources of atmospheric methane (CH₄) worldwide. Peatland emissions are projected to increase under climate change, as rising temperatures and shifting precipitation accelerate microbial metabolic pathways favorable for CH₄ production. However, how these changing environmental factors will impact peatland emissions over the long term remains unknown. Here, we investigate a novel data set spanning an exceptionally long 11 years to analyze the influence of soil temperature and water table elevation on peatland CH₄ emissions. We show that higher water tables dampen the springtime increases in CH₄ emissions as well as their subsequent decreases during late summer to fall. These results imply that any hydroclimat

SUBMITTER: Feng X 

PROVIDER: S-EPMC7894081 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature