Articles | Volume 14, issue 5
Research article
10 Sep 2018
Research article |  | 10 Sep 2018

A model perspective on the dynamics of the shadow zone of the eastern tropical North Atlantic – Part 1: the poleward slope currents along West Africa

Lala Kounta, Xavier Capet, Julien Jouanno, Nicolas Kolodziejczyk, Bamol Sow, and Amadou Thierno Gaye

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Cited articles

Alpers, W., Brandt, P., Lazar, A., Dagorne, D., Sow, B., Faye, S., Hansen, M. W., Rubino, A., Poulain, P.-M., and Brehmer, P.: A small-scale oceanic eddy off the coast of West Africa studied by multi-sensor satellite and surface drifter data, Remote Sens. Environ., 129, 132–143, 2013. a
Anderson, D. L. and Gill, A.: Spin-up of a stratified ocean, with applications to upwelling, Deep-Sea Res., 22, 583–596, 1975. a, b
Bakun, A. and Nelson, C. S.: The seasonal cycle of wind-stress curl in subtropical eastern boundary current regions, J. Phys. Oceanogr., 21, 1815–1834, 1991. a
Barton, E.: The poleward undercurrent on the eastern boundary of the subtropical North Atlantic, in: Poleward Flows Along Eastern Ocean Boundaries, Springer, New York, NY, 82–92, 1989. a, b, c
Barton, E. D.: Eastern boundary of the North Atlantic: Northwest Africa and Iberia, Coastal segment (18, E), in: The sea: The Global Coastal Ocean, edited by: Robinson, A. R. and Brink, K. H., 11, 633–657, 1998. a
Short summary
The currents along the West African seaboard are poorly known. Based on a carefully evaluated numerical simulation the present study describes these currents in the sector 8–20°N and the physical processes that drive them. Prevailing northward flow with two intensification periods per year is identified. Both local and distant coastal winds (blowing as far as thousands of kilometers away in the Gulf of Guinea) contribute to the circulation in this sector.