Ria Oelerich, University of Bremen, Institue of Environmental Physics, Bremen, Germany, Lucas Merckelbach, Helmholtz-Zentrum hereon, Institute of Coastal Ocean Dynamics, Geesthacht, Germany, Maren Walter, University of Bremen, Institute of Environmental Physics, MARUM, Bremen, Germany and Ralf Bachmayer, MARUM - University of Bremen, Center for Marine Environmental Sciences, Bremen, Germany