Abstract
The water below a depth of 1,000 m in the Japan Sea was found to consist of two water masses, the upper layer (the Deep Water) and the lower layer (the Bottom Water). The boundary of these water masses is marked by discontinuity of potential temperature, dissolved oxygen and silicate at about 2,000 m depth. The mean residence time of the Bottom Water was calculated to be 300 years from analysis of carbon-14 data using a box model. By applying a one dimensional diffusion advection model to the profiles of potential temperature and dissolved oxygen, it was suggested that the upward advection in the Deep Water occurs most intensively in the basin south of the Yamato Rise. The Bottom Water seems to be formed not in the northernmost region of the Japan Sea but in the northwestern area, judging from the distributions of potential temperature and dissolved oxygen.
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Gamo, T., Horibe, Y. Abyssal circulation in the Japan Sea. Journal of the Oceanographical Society of Japan 39, 220–230 (1983). https://doi.org/10.1007/BF02070392
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DOI: https://doi.org/10.1007/BF02070392