Trace metals, especially iron in seawater are important for oceanic productivity, which affect global carbon cycles in the ocean. Nevertheless, the factors controlling oceanic iron profile are not clear yet because intensive research for iron distributions in the ocean have not been carried out. In the Japan Sea, only a few data were reported for trace metals. The Japan Sea is a unique marginal sea, whose water can communicate with the open ocean only through four narrow straits shallower than 200 m. We present here the vertical profile of Fe and Mn in the Japan Sea and discuss the oceanographic and geochemical processes governing their distributions. The lateral transport of iron from resuspended sediments particle is an important process in the japan Sea.
trace metals, oceanic productivity, iron in seawater, manganese