Deep water circulation and composition in the Arctic Ocean by dissolved barium, aluminium and silicate

► Profiles of dissolved Ba on ARK-XXII/2 Polarstern expedition in summer 2007. ► Different flow patterns of Ba, Al and Si in intermediate and deep waters. ► Deep shelf convection and diffusion from sediments important in the Nansen Basin. ► In the Amundsen Basin diffusion from sediments into deep water important. ► Inflow from the Canadian and overflow from the Amundsen Basin into the Makarov Basin.