Abstract
Results of recent research on the physical and biological aspects of the Ghanaian coastal upwelling are presented. This upwelling is unusual in that its occurrence and intensity do not correlate with variations in the local wind. During the upwelling the strong stratification over the shelf breaks down as cold saline water comes to the surface, initiating a period of high biological productivity. Surf ace current records and hydrographic sections taken in 19 74 both suggest an offshore displacement in the surface layer, but this and the change in the sea level do not correlate with the surface wind. The upwelling does not appear to be driven by changes in the circulation on the shelf. The observation of low frequency waves over the shelf and on the equator in the Gulf of Guinea suggest that they may provide a nonlocal driving mechanism for this coastal upwelling.
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References
Düing, W., Hisard, P., Katz, E., Meincke, J., Miller, L., Moroshkin, K.V., Philander, G., Ribinikov, A.A., Voigt, K., Weisbert, R.: Meanders and long waves in the Equatorial Atlantic. Nature (London) 257, 280–284 (1975)
Gill, A.E., Clarke, A.J.: Wind induced upwelling, coastal currents and sea level changes. Deep-Sea Res. 21, 325–345 (1974)
Glover, R.S.: The Hardy Plankton Indicator and Sampler: a description of the various models in use. Bull. Marine Ecol. 4, 7–20 (1953)
Houghton, R.W., Beer, T.: Wave propagation during the Ghana Upwelling. J. Geophys. Res. 81, 24, 4423–4429 (1976)
Hsueh, Y., O’Brien, J.J.: Steady coastal upwelling induced by an alongshore current. J. Phys. Oceanog. 1, 180–186 (1971)
Kwei, E.A.: Migration of Sardinella aurita (Val. et Cuv.). Ghana J. Sci. 4 (1), 34–43 (1964)
Longhurst, A.R.: A review of the oceanography of the Gulf of Guinea. Bull. IFAN A24, 633–663 (1962)
Mensah, M.A.: The occurrence of the marine copepod Calanoides carinatus (Krøyer) in Ghanaian waters. Ghana J. Sci. 14 (2), 147–166 (1974a)
Mensah, M.A.: The reproduction and feeding of the marine copepod Calanoides carinatus (Krjøyer) in Ghanaian waters. Ghana J. Sci. 14 (2), 167–192 (1974b)
Morlière, A., Rebert, J.P.: Étude hydrologique du plateau continental ivoirien. Doc. Scient. Centre Rech. Oceanog. Abidjan 3 (2), 1–30 (1972)
Morlière, A., Hisard, Ph., Citeau, J.: Le courant de Lomonosov dans le fond du Gulf de Guinee Moi 1973. Doc. Scient. Centre Rech. Oceanog. Abidjan 5 (1–2), 85–102 (1974)
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© 1978 Springer-Verlag Berlin Heidelberg
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Houghton, R.W., Mensah, M.A. (1978). Physical Aspects and Biological Consequences of Ghanaian Coastal Upwelling. In: Boje, R., Tomczak, M. (eds) Upwelling Ecosystems. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-66985-9_14
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DOI: https://doi.org/10.1007/978-3-642-66985-9_14
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-08822-6
Online ISBN: 978-3-642-66985-9
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