Regeneration of silicate in the ocean |
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Authors: | Katsutoshi Kido Masakichi Nishimura |
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Institution: | (1) Department of Chemistry, Faculty of Fisheries, Hokkaido University, 040 Hakodate, Japan |
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Abstract: | 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: O ![ratio](/content/h17110218653m813/xxlarge8758.gif) C ![ratio](/content/h17110218653m813/xxlarge8758.gif) N ![ratio](/content/h17110218653m813/xxlarge8758.gif) P ![ratio](/content/h17110218653m813/xxlarge8758.gif) Si=–289 (116) 14.3 1 81.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 ofnon-oxidative silicate in the Japan Sea Proper Water was estimated to be 0.07 g-at. Si/l/yr from the data of AOU values and assumed rates of oxygen consumption. This dissolution rate ofnon-oxidative silicate agreed with that obtained in the deep Pacific by the vertical advection diffusion model byKido andNishimura (1972). |
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