Science China Earth Sciences

, Volume 61, Issue 4, pp 483–493 | Cite as

Subtidal variability in the Taiwan Strait induced by combined forcing of winter monsoon and topography

Research Paper
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Abstract

As an important channel connecting the East and South China Seas, circulations in the Taiwan Strait are strongly influenced by the East Asian monsoon and the topography of the strait, especially the Taiwan Bank (TWB), which is a remarkable topographic feature located at the southern entrance to the strait. Based on a series of pressure gauges deployed roughly 40 km offshore along the western Strait, subtidal sea-level variability under the combined impact of winter monsoon and topography was studied. The analyses show significant along-strait coherences of subtidal sea levels and their coherences with the large-scale monsoon wind for periods from 2 to 14 days. It is suggested that these fluctuations are mainly forced waves driven by the large-scale winds. In addition to the normal cross-shore wind setup, a sea-level setup in the along-strait direction is confirmed, which is induced by the combined forcing of the fluctuating winter monsoon and the blocking of the TWB. A southward current surge driven by a northerly wind event will cause a rising sea level over the TWB inducing a southward along-shore slope anomaly to the north of the TWB and a reversed slope anomaly to the south. The subtidal current through the channel to the west of the TWB is found to be influenced by the reversed slope anomalies generated via the along-shore setup.

Keywords

Subtidal variabilities Along-strait sea level setup Taiwan Strait Taiwan Bank 

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Notes

Acknowledgements

This work was supported by National Natural Science Foundation of China (Grant Nos. 41476005 & U1305231). The field work was supported by Chinese Offshore Physical Oceanography and Marine Meteorology Investigation and Assessment Project (Grant No. 908-ZC-I-01).

References

  1. Bendat J S, Piersol A G. 1971. Random Data: Analysis and Measurement Procedures. New York: John Wiley & SonsGoogle Scholar
  2. Chang Y, Lee K T, Lee M A, Lan K W. 2009. Satellite observation on the exceptional intrusion of cold water in the Taiwan Strait. Terr Atmos Ocean Sci, 20: 661–669CrossRefGoogle Scholar
  3. Chen C K. 1975. A study of the movement of cold fronts and associated precipitation along the coast southeast China. Atmosp Sci, 2: 9–21Google Scholar
  4. Chen D K, Su J L. 1987. Continental shelf waves study along China coast (in Chinese). Acta Oceanol Sin, 9: 1–15Google Scholar
  5. Chuang W S. 1985. Dynamics of subtidal flow in the Taiwan Strait. J Oceanogr, 41: 65–72Google Scholar
  6. Chuang W S. 1986. A note on the driving mechanisms of current in the Taiwan Strait. J Oceanogr, 42: 355–361CrossRefGoogle Scholar
  7. Ekman V W. 1905. On the influence of the earth’s rotation on ocean currents. Ark Mat Astron Fys, 2: 1–53Google Scholar
  8. Farris A, Wimbush M. 1996. Wind-induced Kuroshio intrusion into the South China Sea. J Oceanogr, 52: 771–784CrossRefGoogle Scholar
  9. Garrett C, Toulany B. 1982. Sea level variability due to meteorological forcing in the northeast Gulf of St. Lawrence. J Geophys Res, 87: 1968–1978CrossRefGoogle Scholar
  10. He Y, Cai S, Wang D, He J. 2015. A model study of Luzon cold eddies in the northern South China Sea. Deep-Sea Res Part I-Oceanogr Res Pap, 97: 107–123CrossRefGoogle Scholar
  11. Hong B, Wang D. 2006. Diagnostic analysis on the northern South China Sea winter counter-wind current. Chin Sci Bull, 51: 9–16CrossRefGoogle Scholar
  12. Hsieh H J, Hsien Y L, Jeng M S, Tsai W S, Su W C, Chen C A. 2008. Tropical fishes killed by the cold. Coral Reefs, 27: 599–599CrossRefGoogle Scholar
  13. Hu J, Kawamura H, Li C, Hong H, Jiang Y. 2010. Review on current and seawater volume transport through the Taiwan Strait. J Oceanogr, 66: 591–610CrossRefGoogle Scholar
  14. Jacobs G A, Preller R H, Riedlinger S K, Teague W J. 1998. Coastal wave generation in the Bohai Bay and propagation along the Chinese coast. Geophys Res Lett, 25: 777–780CrossRefGoogle Scholar
  15. Jan S, Wang J, Chern C S, Chao S Y. 2002. Seasonal variation of the circulation in the Taiwan Strait. J Mar Syst, 35: 249–268CrossRefGoogle Scholar
  16. Jia Y, Liu Q. 2004. Eddy shedding from the Kuroshio Bend at Luzon Strait. J Oceanogr, 60: 1063–1069CrossRefGoogle Scholar
  17. Ko D S, Preller R H, Jacobs G A, Tang T Y, Lin S F. 2003. Transport reversals at Taiwan Strait during October and November 1999. J Geophys Res, 108: 3370CrossRefGoogle Scholar
  18. Lane-Serff G F. 2004. Topographic and boundary effects on steady and unsteady flow through straits. Deep-Sea Res Part II-Top Stud Oceanogr, 51: 321–334CrossRefGoogle Scholar
  19. Lentz S J, Fewings M R. 2012. The wind-and wave-driven inner-shelf circulation. Annu Rev Mar Sci, 4: 317–343CrossRefGoogle Scholar
  20. Li L. 1989. A study of winter subtidal sea level fluctuation in the Taiwan Strait. Acta Oceanol Sin, 11: 275–283Google Scholar
  21. Li L, Wu B Y. 1989. A Kuroshio loop in South China Sea?—On circulations of the north-eastern South China Sea (in Chinese with English abstract). J Oceanogr in Taiwan Strait, 8: 89–95Google Scholar
  22. Li L. 1993. A study on winter subtidal sea level fluctuation along the northern coast of the South China Sea (in Chinese with English abstract). Tropic Oceanogr, 12: 52–60Google Scholar
  23. Li L, Nowlin Jr. W D, Jilan S. 1998. Anticyclonic rings from the Kuroshio in the South China Sea. Deep-Sea Res Part I-Oceanogr Res Pap, 45: 1469–1482CrossRefGoogle Scholar
  24. Liao E H, Jiang Y W, Li L, Hong H S, Yan X H. 2013. The cause of the 2008 cold disaster in the Taiwan Strait. Ocean Model, 62: 1–10CrossRefGoogle Scholar
  25. Lin S F, Tang T Y, Jan S, Chen C J. 2005. Taiwan strait current in winter. Cont Shelf Res, 25: 1023–1042CrossRefGoogle Scholar
  26. Oey L Y, Chang Y L, Lin Y C, Chang M C, Varlamov S, Miyazawa Y. 2014. Cross flows in the Taiwan Strait in Winter. J Phys Oceanogr, 44: 801–817CrossRefGoogle Scholar
  27. Pan A J, Wan X F, Guo X G, Jing C S. 2013. Responses of the Zhe-Min coastal current adjacent to Pingtan Island to the wintertime monsoon relaxation in 2006 and its mechanism. Sci China Earth Sci, 56: 386–396CrossRefGoogle Scholar
  28. Pratt L J, Helfrich K R, Chassignet E P. 2000. Hydraulic adjustment to an obstacle in a rotating channel. J Fluid Mech, 404: 117–149CrossRefGoogle Scholar
  29. Qiu C, Wang D, He Z, Chen C. 2012. Seasonal variability of chlorophylla fronts in the Luzon Strait based on satellite observations. Aquatic Ecosyst Health Manage, 15: 46–52CrossRefGoogle Scholar
  30. Shao H, Li Y, Li L. 2011. Sun glitter imaging of submarine sand waves on the Taiwan Banks: Determination of the relaxation rate of short waves. J Geophys Res, 116: C06024Google Scholar
  31. Shaw P T. 1989. The intrusion of water masses into the sea southwest of Taiwan. J Geophys Res, 94: 18213–18226CrossRefGoogle Scholar
  32. Shi R, Guo X, Wang D, Zeng L L, Chen J. 2015. Seasonal variability in coastal fronts and its influence on sea surface wind in the Northern South China Sea. Deep-Sea Res Part II-Top Stud Oceanogr, 119: 30–39CrossRefGoogle Scholar
  33. Shih C F, Shaw P T, Li H W. 1986. Low Frequency sea level fluctuations around Taiwan (in Chinese). Acta Oceanogr Taiwanica, 17: 18–28Google Scholar
  34. Thompson R O R Y. 1983. Low-pass filters to suppress inertial and tidal frequencies. J Phys Oceanogr, 13: 1077–1083CrossRefGoogle Scholar
  35. Trowbridge J H, Chapman D C, Candela J. 1998. Topographic effects, straits and the bottom boundary layer. In: Brink K H, Robinson A R, eds. The Sea. New York: John Wiley and Sons. 63–88Google Scholar
  36. Wang D, Liu Y, Qi Y, Shi P. 2001. Seasonal variability of thermal fronts in the northern South China Sea from satellite data. Geophys Res Lett, 28: 3963–3966CrossRefGoogle Scholar
  37. Wang D, Xu H, Lin J, Hu J. 2008. Anticyclonic eddies in the northeastern South China Sea during winter 2003/2004. J Oceanogr, 64: 925–935CrossRefGoogle Scholar
  38. Wang D, Hong B, Gan J, Xu H. 2010. Numerical investigation on propulsion of the counter-wind current in the northern South China Sea in winter. Deep-Sea Res Part I-Oceanogr Res Pap, 57: 1206–1221CrossRefGoogle Scholar
  39. Wang D, Shu Y, Xue H, Hu J, Chen J, Zhuang W, Zu T T, Xu J. 2014. Relative contributions of local wind and topography to the coastal upwelling intensity in the northern South China Sea. J Geophys Res-Oceans, 119: 2550–2567CrossRefGoogle Scholar
  40. Wang J, Chern C S. 1988. On the Kuroshio branch in the Taiwan strait during wintertime. Prog Oceanogr, 21: 469–491CrossRefGoogle Scholar
  41. Wang J, Chen C S. 1989. On cold water intrusions in the eastern Taiwan Strait during the cold season (in Chinese with English abstract). Acta Oceanogr Taiwaica, 22: 43–67Google Scholar
  42. Wang Y H, Chiao L Y, Lwiza K M M, Wang D P. 2004. Analysis of flow at the gate of Taiwan Strait. J Geophys Res, 109: C02025Google Scholar
  43. Zhao B R, Cao D M. 1987. Wintertime low frequency fluctuations of Chinese coastal sea-level in the Huanghai sea and the East China Sea. Oceanol Limnol Sin, 18: 563–574Google Scholar

Copyright information

© Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Third Institute of OceanographyState Oceanic AdministrationXiamenChina
  2. 2.State Key Laboratory of Marine Environmental ScienceXiamen UniversityXiamenChina
  3. 3.College of Earth, Ocean and EnvironmentUniversity of DelawareNewarkUSA

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