Trace Elements in Seawater and Marine Productivity

Research Project , Research Report 2002

Yoshiyuki NOZAKI The Ocean Research Institute, Univ. of Tokyo
Dia Sotto ALIBO Graduate School of Science, Univ. of Tokyo
Hajime OBATA The Ocean Research Institute, Univ. of Tokyo(Research Partners)
Edward A. BOYLE Department of Earth, Atmospheric, and Planetary Sciences, MIT, USA


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