[ Caractéristiques des hauteurs significatives et des périodes de retour des houles de tempêtes dans le Golfe de Guinée ]
Volume 35, Issue 2, January 2022, Pages 294–301
Yao Kouadio Salomon1, Anoumou René Tano2, Malé Gbegbe3, Mondé Sylvain4, and Jacques Abe5
1 Centre de Recherches Océanologiques, Laboratoire de Physique et de Géologie Marine (PHYGEM), Côte d'Ivoire
2 Laboratoire de Physique Fondamentale et appliquée, UFR Sciences Sciences Fondamentales et Appliquées (UFR-SFA) Université Nangui Abrogoua, Abidjan, Côte d’Ivoire
3 Laboratoire de Géologie, Ressources Minérales et Energétiques UFR Sciences de la Terre et des Ressources Minières (UFR-STRM), Université Félix Houphouët-Boigny, Abidjan, Côte d’Ivoire
4 Département de Géosciences Marines, UFR des Sciences de la Terre et des Ressources Minières, Université Félix Houphouët Boigny, Côte d’Ivoire
5 Laboratoire de Physique et de Géologie Marine, Centre de Recherches Océanologiques, Abidjan, Côte d’Ivoire
Original language: French
Copyright © 2022 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The statistical analysis of 58 years of observation of waves data from the ERA-40 and ERA-Interim programs, covering the period 1958-2015, were used to understand significant storm swells heights and recurrence periods charasteristics in the Gulf of Guinea. Results show that the storm swells recorded in the Gulf of Guinea have significant heights between 2.10 and 3.10 m, while their periods are between 7 and 16 s. As for the main directions of origin, they are South and South-South-West on the West African coasts; South-South-West and South-West on the Cameroon coast in Central Africa. the application of Gumbel's theory reveals that the recurrence periods of storm swells are between 2 and 5 years, 5 and 10 years, 10 and 20 years, 20 and 40 years then between 40 and 60 years. These recurrence periods change from coast to coast. as do the estimated significant heights for different recurrence periods. in the last case, these heights also vary over time. the estimated significant storm swells heights of 100 years are of the order of 2.78 m in Côte d'Ivoire, 3.13 m in Ghana, 3.25 m in Togo, 3.22 m in Benin, 3.08 m in Nigeria and 2.91m in Cameroon.
Author Keywords: Analysis, statistics, swell, storm, Gulf, Guinea.
Volume 35, Issue 2, January 2022, Pages 294–301
Yao Kouadio Salomon1, Anoumou René Tano2, Malé Gbegbe3, Mondé Sylvain4, and Jacques Abe5
1 Centre de Recherches Océanologiques, Laboratoire de Physique et de Géologie Marine (PHYGEM), Côte d'Ivoire
2 Laboratoire de Physique Fondamentale et appliquée, UFR Sciences Sciences Fondamentales et Appliquées (UFR-SFA) Université Nangui Abrogoua, Abidjan, Côte d’Ivoire
3 Laboratoire de Géologie, Ressources Minérales et Energétiques UFR Sciences de la Terre et des Ressources Minières (UFR-STRM), Université Félix Houphouët-Boigny, Abidjan, Côte d’Ivoire
4 Département de Géosciences Marines, UFR des Sciences de la Terre et des Ressources Minières, Université Félix Houphouët Boigny, Côte d’Ivoire
5 Laboratoire de Physique et de Géologie Marine, Centre de Recherches Océanologiques, Abidjan, Côte d’Ivoire
Original language: French
Copyright © 2022 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
The statistical analysis of 58 years of observation of waves data from the ERA-40 and ERA-Interim programs, covering the period 1958-2015, were used to understand significant storm swells heights and recurrence periods charasteristics in the Gulf of Guinea. Results show that the storm swells recorded in the Gulf of Guinea have significant heights between 2.10 and 3.10 m, while their periods are between 7 and 16 s. As for the main directions of origin, they are South and South-South-West on the West African coasts; South-South-West and South-West on the Cameroon coast in Central Africa. the application of Gumbel's theory reveals that the recurrence periods of storm swells are between 2 and 5 years, 5 and 10 years, 10 and 20 years, 20 and 40 years then between 40 and 60 years. These recurrence periods change from coast to coast. as do the estimated significant heights for different recurrence periods. in the last case, these heights also vary over time. the estimated significant storm swells heights of 100 years are of the order of 2.78 m in Côte d'Ivoire, 3.13 m in Ghana, 3.25 m in Togo, 3.22 m in Benin, 3.08 m in Nigeria and 2.91m in Cameroon.
Author Keywords: Analysis, statistics, swell, storm, Gulf, Guinea.
Abstract: (french)
L’analyse statistique de 58 années d’observation des données de houles des programmes ERA-40 et ERA-Intérim, couvrant la période 1958-2015, a permis d'appréhender les caractéristiques des hauteurs significatives et des périodes de retour des houles de tempêtes dans le Golfe de Guinée. Elle révèle que les houles de tempêtes enregistrées dans le Golfe de Guinée ont des hauteurs significatives comprises entre 2,10 et 3,10 m, alors que leurs périodes de pic se situent entre 7 et 16 s. Quant aux directions de provenance principale, elles sont Sud et Sud-sud-ouest sur les côtes ouest africaines; Sud-sud-ouest et Sud-ouest sur la côte Camerounaise en Afrique centrale. Il ressort de l'application de la loi de Gumbel que les périodes de retour des houles de tempêtes sont comprises entre 2 et 5 ans, 5 et10 ans, 10 et 20 ans, 20 et 40 ans puis entre 40 et 60 ans. Ces périodes de retour varient d’une côte à l’autre, tout comme les hauteurs significatives estimées pour différentes périodes de retour. Dans ce dernier cas, ces hauteurs varient également dans le temps. Les valeurs centennales sont de l'ordre de 2,78 m en Côte d’Ivoire, 3,13 m au Ghana, 3,25 m au Togo, 3,22 m au Bénin, 3,08 m au Nigéria et 2,91m au Cameroun.
Author Keywords: Analyse, statistique, houle, tempête, Golfe, Guinée.
How to Cite this Article
Yao Kouadio Salomon, Anoumou René Tano, Malé Gbegbe, Mondé Sylvain, and Jacques Abe, “Significant storm swells heights and recurrence periods characteristics in the Gulf of Guinea,” International Journal of Innovation and Applied Studies, vol. 35, no. 2, pp. 294–301, January 2022.
