Regeneration of Silicate in the Ocean:I. The Japan Sea as a Model of Closed System

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Regeneration of silicate in the Japan Sea, an example of semi-closed sea, was studied. In the Japan Sea Proper Water the apparent regenerative ratio of the nutrients was determined to be:ΔO:ΔC:ΔN:ΔP:ΔSi=-289:(116): 14.3: 1: 81.<BR>It was assumed that the dissolved silicate present in sea water is grouped into three fractions; 1) preformed silicate of conservative nature, 2) oxidative silicate which dissolves in oxidation process of organisms with consumption of oxygen, and 3) non-oxidative silicate which dissolves without oxygen consumption. The dissolution rate of non-oxidative silicate in the Japan Sea Proper Water was estimated to be 0.07μg-at. Si/l/yr from the data of ΔAOU values and assumed rates of oxygen consumption. This dissolution rate of <I>non-oxidative</I> silicate agreed with that obtained in the deep Pacific by the vertical advection diffusion model by KIDO and NISHIMURA (1972).
日本海洋学会の論文