Marwa Baloza¹, Sandra Maier^2,3, Claudia Hanfland¹, Susann Henkel^1,4, Sabine Kasten^5,6, Claudio Richter^1,7 and Moritz Holtappels^4,8, (1)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (2)Royal Netherlands Institute for Sea Research, Department of Estuarine and Delta Systems, Yerseke, Netherlands, (3)Greenland Institute of Natural Resources, Greenland Climate Research Centre, Nuuk, Greenland, (4)MARUM - University of Bremen, Bremen, Germany, (5)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Marine Geochemistry, Bremerhaven, Germany, (6)University of Bremen, Faculty of Geosciences, Bremen, Germany, (7)University of Bremen, Faculty 2 Biology /Chemistry, Bremen, Germany, (8)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research, Benthic Ecology, Bremerhaven, Germany