The stable carbon isotope composition of dissolved inorganic carbon (δ13
C-DIC) can be used to quantify fluxes within the marine carbon system such as the exchange between ocean and atmosphere or the amount of anthropogenic carbon in the water column. In this study, an internally consistent δ13
C-DIC dataset for the North Atlantic is presented. The data has undergone a secondary quality control during which systematic biases between the respective cruises have been quantified and adjusted.