This dataset contains data from measurements of 1) atmospheric trace gas concentrations (O3, NO, NO2, SO2, CO) and 2) meteorology, solar and terrestrial radiation, and 3) aerosols done at SMEAR III research station at Kumpula campus, Helsinki, during years 2005–2021. The data were exported from SMEAR database on the dataset release date. Most recent version of the data are available at https://smear.avaa.csc.fi/.

2022