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Circulation patterns in the Delagoa Bight, Mozambique, and the influence of deep ocean eddies

Circulation patterns in the Delagoa Bight, Mozambique, and the influence of deep ocean eddies An investigation of the circulation patterns and thermohaline structures in the Delagoa Bight, Mozambique, was undertaken during May 2004, August 2004, April 2005, and April 2006, using hydrographic surveys, surface drifters and satellite imagery. Hydrographic and satellite data during May 2004 illustrated a cyclonic eddy centred at 26° S, 34.25° E in the Bight. A surface drifter remained trapped in this eddy for six weeks between 8 May and 20 June 2004 before moving southward in the Agulhas Current. During August 2004, the core of a cyclonic eddy was located south of the Bight, while no cyclonic eddy was observed during April 2005 or in April 2006. The Delagoa Bight eddy appeared to be more transient than previously thought. Important observations were the recurrent northward current (25–30 cm s−1) occurring subsurface on the shelf, and the prominence of cooler upwelled water at various locations due to the interaction of passing eddies with the bottom topography of the Bight. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png African Journal of Marine Science Taylor & Francis

Circulation patterns in the Delagoa Bight, Mozambique, and the influence of deep ocean eddies

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Circulation patterns in the Delagoa Bight, Mozambique, and the influence of deep ocean eddies

Abstract

An investigation of the circulation patterns and thermohaline structures in the Delagoa Bight, Mozambique, was undertaken during May 2004, August 2004, April 2005, and April 2006, using hydrographic surveys, surface drifters and satellite imagery. Hydrographic and satellite data during May 2004 illustrated a cyclonic eddy centred at 26° S, 34.25° E in the Bight. A surface drifter remained trapped in this eddy for six weeks between 8 May and 20 June 2004 before moving southward in the...
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Publisher
Taylor & Francis
Copyright
Copyright Taylor & Francis Group, LLC
ISSN
1814-2338
eISSN
1814-232X
DOI
10.2989/1814232X.2010.538147
Publisher site
See Article on Publisher Site

Abstract

An investigation of the circulation patterns and thermohaline structures in the Delagoa Bight, Mozambique, was undertaken during May 2004, August 2004, April 2005, and April 2006, using hydrographic surveys, surface drifters and satellite imagery. Hydrographic and satellite data during May 2004 illustrated a cyclonic eddy centred at 26° S, 34.25° E in the Bight. A surface drifter remained trapped in this eddy for six weeks between 8 May and 20 June 2004 before moving southward in the Agulhas Current. During August 2004, the core of a cyclonic eddy was located south of the Bight, while no cyclonic eddy was observed during April 2005 or in April 2006. The Delagoa Bight eddy appeared to be more transient than previously thought. Important observations were the recurrent northward current (25–30 cm s−1) occurring subsurface on the shelf, and the prominence of cooler upwelled water at various locations due to the interaction of passing eddies with the bottom topography of the Bight.

Journal

African Journal of Marine Science – Taylor & Francis

Published: Dec 27, 2010

Keywords: coastal countercurrent; cyclonic lee eddy; Delagoa Bight; upwelling

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