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The Japan Sea: A Changing Pacific Asian Marginal Sea

  • Tomoharu SenjyuEmail author
Conference paper
  • 37 Downloads

Abstract

The Japan Sea includes its own deep-water formation mechanics and a thermohaline circulation system similar to those of the Mediterranean Sea. Long-term trends of warming and decreasing oxygen concentration owing to global warming have been reported in the deep water of the Japan Sea. Although the minimum oxygen decrease rate of about 1000 m suggests a relatively active supply of new deep water to the depths, the overall deep-water formation has been stagnant since the 1970s throughout the water column. In addition to the gradual linear trends, interdecadal variation occurs in the temperature and oxygen concentration of the abyssal Japan Sea. The correlation between the interdecadal variation and the Arctic oscillation index indicates that the deep-water formation in the Japan Sea is modulated by Arctic oscillation via sea surface temperature in the East China Sea. This is an example of a teleconnection system on the marginal seas scale. For these reasons, we propose a collective name for this system: the Pacific Asian marginal seas system.

Keywords

Marginal seas Deep-water formation Warming trend Decreasing oxygen concentration Global warming Climate change Decadal-scale variations Arctic oscillation Teleconnection Winter monsoon 

Notes

Acknowledgements

The author would like to thank the members of the local organizing committee of the Coast Bordeaux 2017 and the 17th French–Japanese Oceanography Symposium. Part of this study was supported by the Environment Research and Technology Development Fund of Ministry of the Environment, Japan (2-1604) and JSPS KAKENHI Grant Number 18H03741.

References

  1. Bindoff NL, Willebrand J, Artale V, Cazenave A, Gregory J, Gulev S, Hanawa K, Le Quéré C, Levitus S, Nojiri Y, Shum CK, Talley LD, Unnikrishnan A (2007) Observations: oceanic climate change and sea level. In: Climate change 2007: the physical science basis. Contribution of working group I to the fourth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge, pp 385–432Google Scholar
  2. Cui Y, Senjyu T (2010) Interdecadal oscillations in the Japan Sea proper water related to the arctic oscillation. J Oceanogr 66:337–348.  https://doi.org/10.1007/s10872-010-0030-zCrossRefGoogle Scholar
  3. Cui Y, Senjyu T (2012) Has the upper portion of the Japan Sea proper water formation really been enhancing? J Oceanogr 68:593.  https://doi.org/10.1007/s10872-012-0115-yCrossRefGoogle Scholar
  4. Gamo T (1999) Global warming may have slowed down the deep conveyor belt of a marginal sea of the northwestern Pacific: Japan Sea. Geophys Res Lett 26:3137–3140CrossRefGoogle Scholar
  5. Gamo T, Nozaki Y, Sakai H, Nakai T, Tsubota H (1986) Spatial and temporal variations of water characteristics in the Japan Sea bottom water. J Mar Res 44:781–793CrossRefGoogle Scholar
  6. Gamo T, Momoshima N, Tolmachyov S (2001) Recent upward shift of the deep convection system in the Japan Sea, as inferred from the geochemical tracers tritium, oxygen, and nutrients. Geophys Res Lett 28:4143–4146CrossRefGoogle Scholar
  7. Isobe A, Beardsley RC (2007) Atmosphere and marginal-sea interaction leading to an interannual variation in cold-air outbreak activity over the Japan Sea. J Climate 20:5707–5714CrossRefGoogle Scholar
  8. Kawamura H, Wu P (1998) Formation mechanism of Japan Sea proper water in the flux center off Vladivostok. J Geophys Res 103:21611–21622CrossRefGoogle Scholar
  9. Kim K, Kim KR, Min DH, Vlokov Y, Yoon JH, Takematsu M (2001) Warming and structural changes in the East (Japan) Sea: a clue to future changes in global oceans? Geophys Res Lett 28:3293–3296CrossRefGoogle Scholar
  10. MEDOC Group (1970) Observation of formation of deep water in the Mediterranean Sea. Nature 227:1037–1040CrossRefGoogle Scholar
  11. Minami H, Kano Y, Ogawa K (1999) Long-term variations of potential temperature and dissolved oxygen of the Japan Sea proper water. J Oceanogr 55:197–205CrossRefGoogle Scholar
  12. Senjyu T, Sudo H (1993) Water characteristics and circulation of the upper portion of the Japan Sea proper water. J Mar Syst 4:349–362CrossRefGoogle Scholar
  13. Senjyu T, Sudo H (1994) The upper portion of the Japan Sea proper water; its source and circulation as deduced from isopycnal analysis. J Oceanogr 50:663–690CrossRefGoogle Scholar
  14. Senjyu T, Aramaki T, Otosaka S, Togawa O, Danchenkov M, Karasev E, Volkov Y (2002) Renewal of the bottom water after the winter 2000–2001 may spin-up the thermohaline circulation in the Japan Sea. Geophys Res Lett 29(7).  https://doi.org/10.1029/2001gl014093
  15. Seung YH, Yoon JH (1995) Some features of winter convection in the Japan Sea. J Oceanogr 51:61–73CrossRefGoogle Scholar
  16. Sudo H (1986) A note on the Japan Sea proper water. Prog Oceanogr 17:313–336CrossRefGoogle Scholar
  17. Thompson DWJ, Wallace JM (1998) The Arctic Oscillation signature in the wintertime geopotential height and temperature fields. Geophys Res Lett 25(9):1297–1300CrossRefGoogle Scholar
  18. Uda M (1934) The results of simultaneous oceanographical investigations in the Japan Sea and its adjacent waters in May and June. J Imp Fish Exp Sta 5:57–190Google Scholar
  19. Watanabe YW, Wakita M, Maeda N, Ono T, Gamo T (2003) Synchronous bidecadal periodic changes of oxygen, phosphate and temperature between the Japan Sea deep water and the North Pacific intermediate water. Geophys Res Lett 30:2273.  https://doi.org/10.1029/2003GL018338CrossRefGoogle Scholar
  20. Worthington LV (1981) The water masses of the world ocean: some results of a fine-scale census. In: Evolution of physical oceanography. MIT Press, Cambridge, pp 42–69Google Scholar
  21. Yasui M, Yasuoka T, Tanioka K, Shiota O (1967) Oceanographic studies of the Japan Sea (1)–water characteristics. Oceanogr Mag 19:177–192Google Scholar

Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.Research Institute for Applied MechanicsKyushu UniversityKasuga City, FukuokaJapan

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