Upwelling in the Gulf of Guinea: results of a mathematical model
Bah, A. (1981). Upwelling in the Gulf of Guinea: results of a mathematical model, in: Nihoul, J.C.J. (Ed.) Ecohydrodynamics: proceedings of the 12th International Liège Colloquium on Ocean Hydrodynamics. Elsevier Oceanography Series, 32: pp. 99-140. dx.doi.org/10.1016/S0422-9894(08)70406-9
In: Nihoul, J.C.J. (Ed.) (1981). Ecohydrodynamics: Proceedings of the 12th International Liège colloquium on ocean hydrodynamics. Elsevier Oceanography Series, 32. Elsevier Scientific Publishing Company: Amsterdam/London/New York. ISBN 0-444-41969-1; e-ISBN 978-0-444-41969-9. XII, 359 pp., more
In: Elsevier Oceanography Series. Elsevier: Oxford; New york; Amsterdam. ISSN 0422-9894, more
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Document type: Conference paper
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| Abstract |
A numerical simulation of the oceanic response of an x-y-t two-layer model on the ß-plane to an increase of the wind stress is discussed in the case of the tropical Atlantic Ocean. It is shown first that the method of mass transport is more suitable for the present study than the method of mean velocity, especially in the case of non-linearity. The results indicate that upwelling in the oceanic equatorial region is due to the eastward propagating equatorially trapped Kelvin wave, and that in the coastal region upwelling is due to the westward propagating reflected Rossby waves and to the poleward propagating Kelvin wave. The amplification due to non-linearity can be about 25 % in a month. The role of the non-rectilinear coast is clearly shown by the coastal upwelling which is more intense east than west of the three main capes of the Gulf of Guinea; furthermore, by day 90 after the wind's onset, the maximum of upwelling is located east of Cape Three Points, in good agreement with observations. |
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