better understand the risks and opportunities resulting from geo-engineering, (ii) ocean acidification and (iii) atmosphere-ocean-ice interaction, as both AWI and IFM-GEOMAR have expertise in this field. The [...] Mauritzen (Oslo, Norway) oceans role in climate, Arctic ocean and its global connections, meridional overturning circulation Dr. Steve Rintoul (Hobart, Australia) Southern Ocean processes, incl. CO2 Ice [...] e.g.: (i) the atmosphere-ocean-ice interaction; (ii) "biodiversity", in the meaning of unexplored marine ecosystems, food webs and environments, such as the deep polar oceans; (iii) research into the risks