Export of Pacific carbon through the Arctic Archipelago to the North Atlantic

► Inorganic carbon data from east-west transect in Arctic Archipelago. ► Water mass composition determined with TA, S and d18O. ► Fraction of sea-ice melt water increases eastward though Archipelago. ► Non-conservative variations in DIC indicate subsurface carbon surplus. ► Eastward transport of carbon from Pacific to Atlantic estimated.