Abstract
From July to November, the thermocline which has strong temperature gradient (0.7‡C m−1) is formed in the bottom water of Beppu Bay, and it prevents the downward mixing of surface water. This has caused the bottom water of the basin to become depleted in oxygen, and in November the bottom water below about 60 m depth becomes anoxic. Accordingly manganese and iron are reduced and more soluble under the anoxic condition, those concentrations are high relative to surface water, and the maximums are 1,240Μg l−1 and 80Μg l−1. Under the anoxic condition, the flux of dissolved manganese from the sediment is about 10Μg cm−2 day−1.
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References
Calvert, S.E. andN.B. Price (1972): Diffusion and reaction profiles of dissolved manganese in the pore waters of marine sediments. Earth. Planet. Sci. Lett.,16, 245–249.
Graham, W.F., M.L. Bender andG.P. Klinkhammer (1976): Manganese in Narragansett Bay. Limnol. Oceanogr.,21, 665–673.
Riley, J.P. andR. Chester (1972): Introduction to Marine Chemistry. Academic Press, N.Y., 465 pp.
Spencer, D.W. andP.G. Brewer (1971): Vertical advection diffusion and redox potentials as controls on the distribution of manganese and other trace metals dissolved in waters of the Black Sea. J. Geophys. Res.,76, 5877–5892.
Spencer, D.W., P.G. Brewer andP.L. Sachs (1972): Aspects of the distribution and trace element composition of suspended matter in the Black Sea. Geochim. Cosmochim. Acta,36, 71–86.
(1976):25, 760–763.
(1976): 92 pp.
(1977): p. 6.
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Shiozawa, T., Kawana, K., Hoshika, A. et al. Vertical distribution of heavy metals and its seasonal variations in Beppu Bay. Journal of the Oceanographical Society of Japan 33, 350–356 (1977). https://doi.org/10.1007/BF02109582
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DOI: https://doi.org/10.1007/BF02109582