Cited by 3Oceanographic and Atmospheric ProcessesClimate variability and modelsMarine and coastal ecosystems

Relationship between the Guinea Current and the Coastal Upwelling in Northern of Gulf of Guinea

Open access
Djakouré, Sandrine, Konaté, Youssouf, Koné, Vamara, Bosson, Kouacou, Koné, Mamadou, Kouadio, Kouassi Yves·2024·Open Journal of Marine Science

Abstract

The variability of ocean circulation and sea surface temperature (SST) in the tropical Atlantic, especially in the Gulf of Guinea (GG), defines this region as exceptionally rich from an oceanographic perspective. The Guinea Current (GC), as the major surface current, plays a significant role in marine productivity and coastal upwelling in the GG. This coastal upwelling is known to influence the climate of the surrounding region, primary productivity and local fisheries. Studies on GC variability and its impact on this coastal upwelling have highlighted that the upwelling downstream of Cape Palmas is influenced by GC detachment, topographic variations and advective processes leading to significant vertical mixing. This study aims to analyze the interannual variability of the GC and its impact on coastal upwelling using the Coastal and Regional Ocean COmmunity model (CROCO). The model’s evaluation is conducted using observational data, specifically Geostrophic and EKman Current Observatory (GEKCO) and Ocean Surface Current Analysis (OSCAR) for currents, and Air-sea Fluxes for the global Tropic ocean-description (TROPFLUX) and Optimum Interpolation-Sea Surface Temperature (OI-SST) for temperature. Thus, the model evaluation indicates that it accurately replicates ocean circulation and SST patterns in the tropical Atlantic and the GG. The joint analysis of upwelling indices (surface and intensity) and the position of the GC core allowed us to conclude that the displacement of the GC core does indeed influence the upwelling indices in the northern part of GG. However, other oceanic and atmospheric mechanisms such as vertical diffusion and horizontal advection as proposed by previous studies may also affect the year-by-year variability of coastal upwelling in the northern GG.

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Registry

Crossref · 10.4236/ojms.2024.144004

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Research works printed but not linked: 4

  1. Picaut, J. (1983) Sur Les Mécanismes Des Variations Thermiques Dans Le Golfe de Guinée (Du Semi-Diurne à l’interannuel). Ph.D. Thesis, Université de Bretagne Occidentale.
  2. Kolodziejczyk, N. (2008) Analyse de La Circulation de Subsurface et de Sa Variabilité Dans Le Golfe de Guinée. Ph.D. Thesis, Université de Bretagne Occidentale.
  3. 10.1175/1520-0442(2004)017<3364:seavaw>2.0.co;2 · DOI
  4. Sandrine, D. (2015) Analyse numérique de la circulation océanique de la région Nord du Golfe de Guinée. Ph.D. Thesis, Université d’Abomey-Calavi.

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Authors
Djakouré, S., Konaté, Y., Koné, V., Bosson, K., Koné, M., & Kouadio, K. Y.
Venue
Open Journal of Marine Science
Published
2024
Volume
14
Issue
04
Pages
63-77
ISSN
  • 2161-7384 (ISSN-L)
  • 2161-7392
OpenAlex
W4402997171
Cited by
3
References
35
Citations by year
2026: 2 · 2025: 1
FWCI
0.67
Type
journal article
Language
en
Open access
Locations
Open Journal of Marine Science (publishedVersion, cc-by)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Oceanography › Oceanographic and Atmospheric Processes
  • Physical Sciences › Environmental Science › Global and Planetary Change › Climate variability and models
  • Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal ecosystems
Keywords
Guinea Current, coastal upwelling, Gulf of Guinea, interannual variability, sea surface temperature, ocean circulation, vertical mixing, advection, tropical Atlantic

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