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Shelfbreak upwelling induced by alongshore currents: analytical and numerical results

  • Robert N. Miller (a1) (a2), Ricardo P. Matano (a1) and Elbio D. Palma (a3)

Abstract

Alongshore flow in the direction of propagation of coastal trapped waves can result in upwelling at the shelfbreak. The intensity of this upwelling can be comparable in magnitude to wind-driven coastal upwelling, with its associated ecological features. Recent numerical experiments by Matano & Palma indicate that this upwelling results from convergence of Ekman transport at the shelfbreak. The mechanism for this phenomenon can be understood in terms of steady solutions to the shallow water equations in the presence of Coriolis force and bottom drag. Matano & Palma interpreted their numerical results in terms of the arrested topographic wave, but did not present direct comparisons. Here we present a family of analytical solutions to the equations of the arrested topographic wave that shows striking quantitative agreement with earlier numerical results.

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Email address for correspondence: miller@coas.oregonstate.edu

References

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1. Blumberg, A. F. & Mellor, G. L. 1987 A description of a three-dimensional coastal ocean circulation model. In Three-Dimensional Coastal Ocean Models (ed. Heaps, N. ), Coastal Estuarine Science , vol. 4. pp. 116. Am. Geophys. Union.
2. Carslaw, H. S. & Jaeger, J. C. 1959 Conduction of Heat in Solids. Oxford University Press.
3. Chapman, D. C. 1986 A simple model of the formation and maintenance of the shelf/slope front in the Middle Atlantic Bight. J. Phys. Oceanogr. 16, 12731279.
4. Csanady, G. T. 1978 The arrested topographic wave. J. Phys. Oceanogr. 8, 4762.
5. Gawarkiewicz, G. & Chapman, D. C. 1991 Formation and maintenance of shelfbreak fronts in an unstratified flow. J. Phys. Oceanogr. 21, 12251239.
6. Hill, A. E. 1995 Leakage of barotropic slope current onto the continental shelf. J. Phys. Oceanogr. 25, 16171621.
7. Matano, R. P. & Palma, E. D. 2008 On the upwelling of downwelling currents. J. Phys. Oceanogr. 38, 24822500.
8. Pedlosky, J. 1979 Geophysical Fluid Dynamics. Springer.
9. Pickart, R. S. 2000 Bottom boundary layer structure and detachment in the shelfbreak jet of the Middle Atlantic Bight. J. Phys. Oceanogr. 30, 26682686.
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Shelfbreak upwelling induced by alongshore currents: analytical and numerical results

  • Robert N. Miller (a1) (a2), Ricardo P. Matano (a1) and Elbio D. Palma (a3)

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