Ragoasha M. N. auteur aut IRD Herbette S. auteur aut IRD Veitch J. auteur aut IRD Cambon Gildas auteur aut IRD Reason C. J. C. auteur aut IRD Roy Claude auteur aut IRD text journalArticle eng text/pdf born digital access A 3-km resolution regional ocean model is used to investigate the role of wind-driven coastal circulation and mesoscale variability on the inter-annual variability of transport success in the southern Benguela between Cape Point (34 degrees S) and St Helena Bay (32 degrees S) from 1992 to 2011. Lagrangian particles are released within the top 100 m of the water column along an across-shore transect off Cape Point. Transport success is given by the ratio of the number of particles that reach St Helena Bay over the total number of particles released. The analysis of transport success anomalies and their relationship with the local circulation and wind forcing reveal that there is no single driver of the inter-annual variability. The transport success variability of particles released on the shelf (depths <300 m) mainly depends on their capacity to remain embedded within the coastal Benguela Jet. Nevertheless, peaks in offshore Ekman transport and episodic occurrence of a poleward inner-shelf counter-current contribute to negative anomalies. For particles released on the outer shelf edge (depths >500 m), across-shore transports induced by mesoscale eddies are the main contributors to transport success variability. Rare passage of Agulhas rings near the shelf edge can induce strong offshore advection of particles into the open ocean. In contrast, shelf-edge cyclonic eddies favor the onshore transport of particles originating from the outer shelf edge and thus contribute to increasing transport success. specialized along-shore connectivity Benguela upwelling system fine-scale ocean circulation model interannual variability ATLANTIQUE 032 020 127 3 e2020JC017114 [25 ] 2022 2169-9275 https://www.documentation.ird.fr/hor/fdi:010084612 10.1029/2020jc017114 2169-9275 [F B010084612] https://www.documentation.ird.fr/hor/fdi:010084612 https://www.documentation.ird.fr/intranet/publi/2022-05/010084612.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2022-05-04 2025-02-24 fdi:010084612 fre