Mr. Jaromir Jakacki, PhD¹, Jacek Bełdowski², Christian Frølund Damgaard³, Patrik Fauser⁴, Lærke Ina Krogaard Hansen⁴, Peter Borgen Sørensen³ and Hans Sanderson⁴, (1)Institute of Oceanology Polish Academy of Sciences, Physical Oceanography Department, Sopot, Poland, (2)Institute of Oceanology Polish Academy of Sciences, Marine Chemistry and Biochemistry Department, Sopot, Poland, (3)Aarhus University, Department of Ecoscience, Aarhus C, Denmark, (4)Aarhus University, Department of Environmental Science, Aarhus C, Denmark