Per O J Hall¹, Nils Ekeroth¹, Mikhail Y. Kononets¹, Stefano Bonaglia², Volker Bruchert³ and Anders Tengberg⁴, (1)University of Gothenburg, Department of Marine Sciences, Gothenburg, Sweden, (2)Stockholm University, Department of Ecology, Environment and Plant Sciences, Stockholm, Sweden, (3)Stockholm University, Geological Sciences and Bolin Centre for Climate Research, Stockholm, Sweden, (4)Chalmers University of Techonology, Shipping and Marine Technology, Gothenburg, Sweden