This dataset contains the fluxes measured using a Licor LI-7810 trace gas analyzer and associated environmental data. Each row of data is one measurement using the static chamber method. The data are group by site and measurement year as follows: Evo 2020: fluxdat_EV20.csv Kiviniemi, Leppävirta 2023: fluxdat_LV23.csv Kiviniemi, Leppävirta 2024: fluxdat_LV24.csv Kiviniemi, Leppävirta 2025: fluxdat_LV25.csv Ruunaa, Lieksa 2022: fluxdat_RU22.csv Ruunaa, Lieksa 2023: fluxdat_RU23.csv Ruunaa, Lieksa 2024: fluxdat_RU24.csv A file containing all the methane fluxes from all years and sites is also included: allch4.csv The metadata to define of all the variables(containing units) are described in: variable_names_glossary.txt The metadata for the location of each plot is listed in the file: plot_locations.csv