天然放射性核種と希土類元素による海洋物質循環の研究(1998年度日本海洋学会学会賞受賞記念講演)

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I have currently worked on the chemistry and geochemistry of the ocean with special focus on seawater for which the Prize of the Oceanographic Society of Japan was awarded in 1998. Coincidentally, during the last few decades, my work is closely followed by the world-wide development of new analytical and sampling techniques that enabled us to establish the oceanic distributions of almost all the elements existing in seawater. It seems that a long desire of world chemical oceanographers is now going to be achieved. Nevertheless, kinetics that govern the present-day elemental composition and distribution are not well understood as yet, because fluxes to and out of the ocean are poorly quantified for most elements. Exceptions are natural radionuclides that have served as useful tracers to determine how the elements behave in the ocean (Nozaki, 1991). By coupling knowledge from the natural radionuclides and those of elements with similar chemical reactivities, for example, ^227Ac versus lanthanide, the dynamic aspects of geochemical cycling in the ocean will be better elucidated. This is an aspect described in this article.
日本海洋学会の論文
1998-12-05