The data provided at the https://saaristomeri.utu.fi website is licenced with The Creative Commons Attribution 4.0 International license (CC BY 4.0). This means that you must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
Examples how to cite the data:
Water quality buoy: “Seili Environmental monitoring programme, Odas profiling buoy datasets. YEAR. Turku University/ Turku University of Applied sciences, Turku. https://saaristomeri.utu.fi/odas_en/”.
Weather station: “Seili Environmental monitoring programme, Weather station datasets. YEAR. Turku University, Turku. https://saaristomeri.utu.fi/weather/”.