Aquatic methane concentrations in Lough Feeagh and the Burrishoole catchment 2019.

These data resulted from a 6-month study aimed at examining CH4 transport from the peatland-dominated catchment of Lough Feeagh, a dystrophic lake in Western Ireland. CH4 enrichment of the lower catchment river resulted in elevated surface CH4 levels near the lake inflow. Concentrations declined along a transect to the lake's deepest point, a phenomenon which was especially pronounced during dry periods with low stream discharge. Incubation experiments and flux modeling revealed CH4 loss was driven by oxidation and atmospheric emissions. Methodologies are described in Hansson et al (in prep).