FN Archimer Export Format PT J TI Seasonal and inter-annual ONSET Sea Surface Temperature variability along the northern coast of the Gulf of Guinea BT AF Sohou, Z. Koné, V. Da-Allada, Y.C. Djakouré, S. Bourlès, Bernard Racape, Virginie Degbe, G. Adje, C. AS 1:1,2;2:3;3:1,4,5;4:6;5:7;6:8;7:1;8:1; FF 1:;2:;3:;4:;5:;6:;7:;8:; C1 Institut de Recherches Halieutiques et Océanologiques du Bénin (IRHOB/CBRSI), Benin Département Zoologie, Faculté des Sciences et Techniques (FAST/UAC), Benin Centre de Recherches Océanologiques de Côte-d’Ivoire (CRO), 29, Rue des Pêcheurs, BPV 18, Abidjan, Cote d’Ivoire ENSTP/UNSTIM, Abomey, Benin ICPMA-UNESCO Chair/UAC, Cotonou, Benin Laboratoire de Physique de l’Atmosphère et de Mécanique des Fluides (LAPA-MF), UFR SSMT, Université Félix Houphouët-Boigny, Abidjan, Cote d’Ivoire IRD/IMAGO, Centre IRD de Bretagne, Technopole Pointe du Diable, Plouzané, France CNRS/CORIOLIS, Plouzané, France C2 IRHOB, BENIN UNIV ABOMEY CALAVI, BENIN CRO, COTE IVOIRE ENSTP, BENIN UNESCO, BENIN UNIV FELIX HOUPHOUET BOIGNY, COTE IVOIRE IRD, FRANCE CORIOLIS, FRANCE IF 1.624 TC 10 UR https://archimer.ifremer.fr/doc/00607/71885/70583.pdf LA English DT Article DE ;Sea Surface Temperature;ONSET data;Gulf of Guinea;Coastal upwelling;Seasonal variability;Inter-annual variability AB The aim of this study is to characterize the coastal upwelling variability at seasonal and inter-annual time scales in the northern Gulf of Guinea (NGoG) using Sea Surface Temperature (SST) collected with autonomous “ONSET” thermometers. Results show that the ONSET SST data are suitable for numerical model evaluation, and provide relevant information in addition to satellite and reanalysis data at seasonal cycle. The minor and major coastal upwellings are present in all the products. The inter-annual SST variability is more pronounced in the western part of the region (Côte d’Ivoire and Ghana) than in the eastern part (Benin and Nigeria). The pattern differences between the west and the east of the region highlight a large spatial variability of the SST in the NGoG. Indeed, the signal of the minor upwelling season is visible only in the west of the basin, namely between Cape Palmas and Cape Three Points. We also observe a well-established thermal gradient between the western and eastern parts of the basin. This gradient is increasing from west to east during the major upwelling season, and decreasing from east to west during the rest of the year. The coastal ONSET data allow to evidence higher SST anomalies than those deduced from satellite and reanalysis products. Although the cold or warm events observed in 2008, 2010 and 2012 are well detected by all products, only the ONSET data set reveal the strong negative SST anomaly observed in 2009 along the coast of Ghana and Côte d’Ivoire. PY 2020 PD MAR SO Regional Studies In Marine Science SN 2352-4855 PU Elsevier BV VL 35 UT 000525758600016 DI 10.1016/j.rsma.2020.101129 ID 71885 ER EF