IRON DISTRIBUTIONS IN SURFACE WATERS OF THE SOUTH-ATLANTIC

Total dissolvable iron in surface waters of the south Atlantic was mea sured using a flow injection analytical system with chemiluminescent d etection and preconcentration onto 8-hydroxyquinoline resin. Surface w ater iron concentrations range from less than 0.5 nM to 10 nM. Results indicate that very high iron concentrations in the surface seawater a re possible due to high atmospheric input and upwelling. The dual inpu t mechanism is supported by correlations with Al, particulate matter a nd nutrients.