Fig. 3: Day time methane flux and atmospheric aerosol particle concentrations.

Daily median values of methane flux (μmol s−1m−2) and cluster concentrations (cm−3) during the light hours (09:00–15:00). Good correlation between the variables indicates the same source and not the causality. Color scale denotes the concentration of sulphuric acid, where no systematic features could be observed. This indicates a minor role of sulphuric acid in small particle formation over wetland. Panel a) particle size 1–1.2 nm; b) particle size 1.2–1.4 nm; c) particle size 1.4–1.7 nm; d) particle size 1.7–2.4 nm.