Abstract
The long-term variation of water properties in the upper portion of the Japan Sea Proper Water (UJSPW) is examined on the basis of hydrographic data at PM10, located on the northwestern Japan Sea, and at PM05, in the Yamato Basin, taken from 1965 through 1982. At PM10, located at the southern boundary of the UJSPW formation region, dissolved oxygen fluctuations on the UJSPW core showed negative correlation with phosphate variations, but showed no signficant correlation with salinity variations. At PM05 water properties fluctuated with smaller amplitudes than those at PM10 except for salinity. Dissolved oxygen variations at PM10 lead those at PM05 by 12–15 months, suggesting that the UJSPW near PM10 circulates into the Yamato Basin spending 12–15 months. Increases of dissolved oxygen contents in summer on relevant isopycnal surfaces at PM10 occurred after cold and/or windy winters except for two of eight; this suggests that larger volume of the UJSPW is formed in severa winter. Rough estimations of the formation rate and existing volume of the UJSPW are made on the basis of a climatological dataset; 1.5×104 km3 yr−1 and 27.3×104 km3, respectively. The ventilation time of the UJSPW, 18.2 years, is about one tenth or less of residence time for the entire Japan Sea Proper Water. This indicates that the UJSPW is renewed about ten times as quick as the deeper water.
Similar content being viewed by others
References
Clarke, R. A. and J.-C. Gascard (1983): The formation of Labrador Sea Water. Part I: Large-scale processes.J. Phys. Oceanogr.,13, 1764–1778.
Gamo, T. and Y. Horibe (1983): Abyssal circulation in the Japan Sea.J. Oceanogr. Soc. Japan,39, 220–230.
Harada, K. and S. Tsunogai (1986):226Ra in the Japan Sea and the residence time of the Japan Sea water.Earth Planet. Sci. Lett.,77, 236–244.
Jenkins, W. J. (1980): Tritium and3He in the Sargasso Sea.J. Mar. Res.,38, 533–569.
Kitani, K. (1987): Direct current measurement of the Japan Sea Proper Water.Nihonkai-ku Suisan Shiken Kenkyuu Renraku News, Japan Sea National Fisheries Research Institute,341, 1–6 (in Japanese).
Lazier, J. N. R. (1980): Oceanographic conditions at Ocean Weather ShipBravo, 1964–1974.Atmos.-Ocean,18, 227–238.
Senjyu, T. and H. Sudo (1993): Water characteristics and circulation of the upper portion of the Japan Sea Proper Water.J. Mar. Sys. 4, 349–362.
Senjyu, T. and H. Sudo (1994): The upper portion of the Japan Sea Proper Water; its source and circulation as deduced from isopycnal analysis.J. Oceanogr.,50, 663–690.
Senjyu, T., M. Matsuyama, H. Sudo, H. Yamada, J. Yoshida and Y. Kurita (1992): The topographic effect on the density structure in upper part of the Japan Sea Proper Water near the Yamato Rise.Umi to Sora (Sea and Sky),68, 1–12 (in Japanese with English abstract).
Seung, Y. H. and J.-H. Yoon (1995): Some features of winter convection in the Japan Sea.J. Oceanogr.,51, 61–73.
Stommel, H. (1972): Deep winter-time convection in the western Mediterranean Sea. p. 207–218. InStudies in Physical Oceanography: A Tribute to Georg. Wüst. on his 80th Birthday,2, ed. by A. L. Gordon, Gordon and Breach, New York.
Sudo, H. (1986): A note on the Japan Sea Proper Water.Prog. Oceanogr.,17, 313–336.
Suga, T., K. Hanawa and Y. Toba (1989): Subtropical Mode Water in the 137°E section.J. Phys. Oceanogr.,19, 1605–1618.
Talley, L. D. and M. S. McCartney (1982): Distribution and circulation of Labrador Sea Water.J. Phys. Oceanogr.,12, 1189–1205.
Tsunogai, S., Y. W. Watanabe, K. Harada, S. Watanabe, S. Saito and M. Nakajima (1993): Dynamics of the Japan Sea deep water studied with chemical and radiochemical tracers. p. 105–119. InDeep Ocean Circulation, Physical and Chemical Aspects, ed. by T. Teramoto, Elsevier Oceanography Series 59, Elsevier Science Publishers, Amsterdam.
Uda, M. (1934): The results of simultaneous oceanographical investigations in the Japan Sea and its adjacent waters in May and June, 1932.J. Imp. Fish. Exp. Sta.,5, 57–190 (in Japanese with English abstract).
Watanabe, Y. W., S. Watanabe and S. Tsunogai (1991): Tritium in the Japan Sea and the renewal time of the Japan Sea deep water.Mar. Chem.,34, 97–108.
Worthington, L. V. (1981): The water masses of the world ocean: Some results of a fine-scale census. p. 42–69. InEvolution of Physical Oceanography, ed. by B. A. Warren and C. Wunsch, M.I.T. Press, Cambridge.
Wyrtki, K. (1962): The oxygen minima in relation to ocean circulation.Deep-Sea Res.,9, 11–23.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Senjyu, T., Sudo, H. Interannual variation of the upper portion of the Japan Sea Proper Water and its probable cause. J Oceanogr 52, 27–42 (1996). https://doi.org/10.1007/BF02236531
Received:
Revised:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02236531