Keywords: Absorption coefficient, 230 nm; Absorption coefficient, 254 nm; Absorption coefficient, 275 nm; Absorption coefficient, 295 nm; Absorption coefficient, 300 nm; Absorption coefficient, 350 nm; Absorption coefficient, 355 nm; Absorption coefficient, 375 nm; Absorption coefficient, 400 nm; Absorption coefficient, 440 nm; Aluminium, dissolved; Ammonium; Automated analysis following alkaline persulfate oxidation; Bacteria; Carbon, organic, dissolved; DATE/TIME; Depth, description; Depth of Secchi Disk; Event label; Fluorescence, peak A; Fluorescence, peak C; Fluorescence, peak M; Fluorescence, peak T; Fluorescence index; High nucleic acid bacteria; ICP-OES; Iron, dissolved; Kyronjoki_00; Kyronjoki_01; Kyronjoki_02; Kyronjoki_03; Kyronjoki_04; Kyronjoki_XX; Lachat QuickChem 8000 flow injection autoanalyzer; LATITUDE; Leucine incorporation rate; LONGITUDE; Low nucleic acid bacteria; Manganese, dissolved; Manually after Grasshoff et al. (1983); Molecular mass; MULT; Multiple investigations; Nitrate; Nitrite; Nitrogen, inorganic, dissolved; Nitrogen, organic, dissolved; Nitrogen, total; Nitrogen, total dissolved; PDZ Europa ANCA-GSL elemental analyser; Ratio; Salinity; Sample ID; SEC analyser; Silicate; Specific ultraviolet absorbance normalized to DOC; Spectral slope, 275-295 nm; Spectral slope, 300-650 nm; Spectral slope, 350-400 nm; Spectrophotometer UV/VIS (PerkinElmer Lambda 650); Subtracting combined inorganic nitrogen from total dissolved nitrogen; Temperature, water; Thymidine incorporation rate; TOC analyser, MQ1000; Varian Cary Eclipse fluorometer (Agilent); δ13C, dissolved inorganic carbon; δ15N, total dissolved nitrogen