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Journal of Oceanology and Limnology

, Volume 36, Issue 3, pp 630–640 | Cite as

Cross-shelf transport induced by coastal trapped waves along the coast of East China Sea

  • Lin Jiang (蒋琳)
  • Changming Dong (董昌明)
  • Liping Yin (尹丽萍)
Article
  • 29 Downloads

Abstract

Cross-shelf transport is important due to its role in the transport of nutrients, larvae, sediments, and pollutants. The role of coastal trapped waves (CTWs) and their contribution to the cross-shelf transport is presently unknown. The impact of wind-driven CTWs on the structure of the cross-shelf currents and transport is investigated in the East China Sea (ECS) starting from theory. The cross-shelf currents are divided into four terms: the geostrophic balance (GB) term, the second-order wave (SOW) term, the bottom friction (BF) term and Ekman (EK) term, as well as three modes: the Kelvin wave (KW) mode, the first shelf wave (SW1) mode and the second shelf wave (SW2) mode. Comparison among these decompositions shows that (1) for the four terms, the effect of the GB and EK terms is continual, while that of the BF term is confined to 60–240 km offshore, and the contribution of the SOW term can be ignored; (2) for the three modes, the KW and SW1 modes are dominant in cross-shelf transport. The results show that the total cross-shelf transport travels onshore under idealized wind stress on the order of 10-1, and it increases along the cross-shelf direction and peaks about -0.73 Sv at the continental shelf margin. With the increase of linear bottom friction coefficient, the cross-shelf transport declines with distance with the slope becoming more uniform.

Keyword

cross-shelf transport coastal trapped waves East China Sea (ECS) 

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Notes

Acknowledgement

The authors would like to thank Prof. Liang, Prof. Weber, Prof. Wang and Kenny for their kindly help in this work.

References

  1. Brink K H. 1991. Coastal-trapped waves and wind-driven currents over the continental shelf. Annual Review of Fluid Mechanics, 23 (1): 389–412.CrossRefGoogle Scholar
  2. Chapman D C. 1987. Application of wind-forced, long, coastal-trapped wave theory along the California coast. Journal of Geophysical Research: Oceans, 92 (C2): 1 798–1 816.CrossRefGoogle Scholar
  3. Chen D K, Su J L. 1987. Continental shelf waves along the coasts of China. Acta Oceanologica Sinica, 6 (3): 317–334. (in Chinese)Google Scholar
  4. Clarke A J, Brink K H. 1985. The response of stratified, frictional flow of shelf and slope waters to fluctuating large-scale, low-frequency wind forcing. Journal of Physical Oceanography, 15 (4): 439–453.CrossRefGoogle Scholar
  5. Clarke A J, Van Gorder S. 1986. A method for estimating winddriven frictional, time-dependent, stratified shelf and slope water flow. Journal of Physical Oceanography, 16 (6): 1 013–1 028.CrossRefGoogle Scholar
  6. Colas F, Capet X, Mcwilliams J C et al. 2008. 1997–199. El Niño offPeru: a numerical study. Progress in Oceanography, 79 (2–4): 138–155.CrossRefGoogle Scholar
  7. Dong L X, Guan W B, Chen Q et al. 2011. Sediment transport in the Yellow Sea and East China Sea. Estuarine, Coastal and Shelf Science, 93 (3): 248–258.CrossRefGoogle Scholar
  8. Echevin V, Albert A, Lévy M et al. 2014. Intraseasonal variability of nearshore productivity in the Northern Humboldt Current System: the role of coastal trapped waves. Continental Shelf Research, 73: 14–30.CrossRefGoogle Scholar
  9. Fewings M, Lentz S J, Fredericks J. 2011. Observations of cross-shelf flow driven by cross-shelf winds on the inner continental shelf. Journal of Physical Oceanography, 38 (11): 2 358–2 378.CrossRefGoogle Scholar
  10. Gill A E, Clarke A J. 1974. Wind-induced upwelling, coastal currents and sea-level changes. Deep Sea Research and Oceanographic Abstracts, 21 (5): 325–345.CrossRefGoogle Scholar
  11. Gill A E, Schumann E H. 1974. The generation of long shelf waves by the wind. Journal of Physical Oceanography, 4 (1): 83–90.CrossRefGoogle Scholar
  12. Hamon B V. 1962. The spectrums of mean sea level at Sydney, Coff’s Harbour, and Lord Howe Island. Journal of Geophysical Research, 67 (13): 5 147–5 155.CrossRefGoogle Scholar
  13. Hsueh Y, Pang I C. 1989. Coastally trapped long waves in the Yellow Sea. Journal of Physical Oceanography, 19 (5): 612–625.CrossRefGoogle Scholar
  14. Huthnance J M. 1995. Circulation, exchange and water masses at the ocean margin: the role of physical processes at the shelf edge. Progress in Oceanography, 35 (4): 353–431.CrossRefGoogle Scholar
  15. Li J Y, Zheng Q A, Hu J Y et al. 2015. Wavelet analysis of coastal-trapped waves along the China coast generated by winter storms in 2008. Acta Oceanologica Sinica, 34 (11): 22–31.CrossRefGoogle Scholar
  16. Liu K K, Tang T Y, Gong G C et al. 2000. Cross-shelf and along-shelf nutrient fluxes derived from flow fields and chemical hydrography observed in the southern East China Sea offnorthern Taiwan. Continental Shelf Research, 20 (4–5): 493–523.CrossRefGoogle Scholar
  17. Mitchum G T, Clarke A J. 1986. The frictional Nearshore response to forcing by synoptic scale winds. Journal of Physical Oceanography, 16 (5): 934–946.CrossRefGoogle Scholar
  18. Tilburg C E. 2003. Across-shelf transport on a continental shelf: do across-shelf winds matter? Jo urnal of Physical Oceanography, 33 (12): 2 675–2 688.CrossRefGoogle Scholar
  19. Wang J, Yuan L Y, Pan Z D. 1988. Numerical studies and analysis about continental shelf waves. Acta Oceanologica Sinica, 10 (6): 666–677. (in Chinese)Google Scholar
  20. Weber J E H, Drivdal M. 2012. Radiation stress and mean drift in continental shelf waves. Continental Shelf Research, 35: 108–116.CrossRefGoogle Scholar
  21. Xie F, Pang Y, Zhuang W et al. 2008. Study on regularity of matter transportation in the Nearshore Area of the Haizhou Bay. Advances in Marine Science, 26 (3): 347–353. (in Chinese)Google Scholar
  22. Yin L P, Qiao F L, Zheng Q A. 2014. Coastal-trapped waves in the East China Sea observed by a mooring array in winter 2006. Journal of Physical Oceanography, 44 (2): 576–590.CrossRefGoogle Scholar
  23. Yuan D L, Hsueh Y. 2010. Dynamics of the cross-shelf circulation in the Yellow and East China Seas in winter. Deep Sea Research Part II: Topical Studies in Oceanography, 57 (19-20): 1 745–1 761.CrossRefGoogle Scholar
  24. Zhang S, Alford M H, Mickett J B. 2015. Characteristics, generation and mass transport of nonlinear internal waves on the Washington continental shelf. Journal of Geophysical Research: Oceans, 120 (2): 741–758.Google Scholar

Copyright information

© Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Lin Jiang (蒋琳)
    • 1
    • 2
  • Changming Dong (董昌明)
    • 1
    • 2
    • 3
  • Liping Yin (尹丽萍)
    • 4
    • 5
  1. 1.School of Marine SciencesNanjing University of Information Science and TechnologyNanjingChina
  2. 2.Oceanic Modeling and Observation LaboratoryNanjing University of Information Science and TechnologyNanjingChina
  3. 3.Department of Atmospheric and Oceanic SciencesUniversity of CaliforniaLos AngelesUSA
  4. 4.First Institute of OceanographyState Oceanic AdministrationQingdaoChina
  5. 5.Laboratory for Regional Oceanography and Numerical ModelingQingdao National Laboratory for Marine Science and TechnologyQingdaoChina

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