Influence of underwater light fields on pigment characteristics in the Baltic Sea – results of statistical analysis**This work was carried out within the framework of the SatBałtyk project funded by the European Union through the European Regional Development Fund, (contract No. POIG.01.01.02-22-011/09 entitled ‘The Satellite Monitoring of the Baltic Sea Environment’), research project NN 304 275235 and also as part of IO PAS’s statutory research.