Comparaisons des systèmes productifs de l'Atlantique tropical est : dômes thermiques, upwellings côtiers et upwelling équatorial The Canary student : studies of an upwelling system Voituriez, B. /Herbland, Alain COURANT EQUATORIAL CONTRECOURANT UPWELLING COURANT GEOSTROPHIQUE PRODUCTION PRIMAIRE All the high-productive systems of the Eastern tropical Atlantic between 20°N and 15°S - coastal upwelling, equatorial upwelling, and thermal domes-are partly controlled by the subsuperficial equatorial countercurrent system, which feeds all of them with Southern Atlantic Central Water. However, the enrichment processes in the systems are quite different, and thus the structures differ from one another. Two types have to be considered : 1) the quasi geostrophic ones which are two-layered systems belonging to the "typical tropical situations", where the primary production is controlled by the depth of the nitraciline; 2) the systems including coastal upwelling and equatorial divergence in summer, where the warm nitrate-depleted mixed layer is absent. (D'après résumé d'auteur) CIEM 1982 text https://www.documentation.ird.fr/hor/fdi:42794 fdi:42794 Voituriez B., Herbland Alain. Comparaisons des systèmes productifs de l'Atlantique tropical est : dômes thermiques, upwellings côtiers et upwelling équatorial. In : . The Canary student : studies of an upwelling system CIEM, ). 1982, 180, 107-123 Symposium on the Canary Student : Studies of an Upwelling System, Las Palmas (ESP), 1978/03/11-14 FR GOLFE DE GUINEE ATLANTIQUE TROPICAL