Horizon / Plein textes La base de ressources documentaires de l'IRD



Publications des scientifiques de l'IRD

Veitch J. A., Penven Pierrick. (2017). The role of the Agulhas in the Benguela Current system : a numerical modeling approach. Journal of Geophysical Research : Oceans, 122 (4), 3375-3393. ISSN 2169-9275

Accès réservé (Intranet IRD) Demander le PDF

Lien direct chez l'éditeur doi:10.1002/2016jc012247

The role of the Agulhas in the Benguela Current system : a numerical modeling approach
Année de publication2017
Type de documentArticle référencé dans le Web of Science WOS:000402139900041
AuteursVeitch J. A., Penven Pierrick.
SourceJournal of Geophysical Research : Oceans, 2017, 122 (4), p. 3375-3393. ISSN 2169-9275
RésuméA modeling approach is used to investigate the influence of the Agulhas on the southern Benguela system. Two climatological ROMS simulations are run that are identical except that in one of them the effect of the Agulhas is removed. Comparing their outputs allows for a clear indication of the role of the Agulhas on both the large-scale and shelf dynamics. About 15 Sv of the mean transport of the Benguela Current is shown to be contributed by Agulhas influx, with the most intense flow being associated with extreme turbulence and its meandering nature is a reflection of the passage of Agulhas Rings. The injection of warm water is particularly evident beyond the shelf-edge, producing a perennially intense cross-shelf density front that is enhanced during upwelling season. This gradient drives a jet that is fastest at the shelf-edge but that extends from the midshelf to at least 100 km beyond it and is associated with dynamic uplift via vortex squashing. Similarly generated is the Good Hope Jet that extends northwestward from the western Agulhas Bank. Turbulence associated with Agulhas leakage increases rapidly beyond the shelf-edge causing the upwelling front in the southern Benguela to be subject to intense mixing, leaving a relatively uniform front there. Locally generated regions of high turbulence exist in the vicinity of the shelf-edge jets as well as further north in association with the large filaments that originate from the perennial Luderitz upwelling cell, with or without the influence of the Agulhas.
Plan de classementLimnologie physique / Océanographie physique [032] ; Sciences fondamentales / Techniques d'analyse et de recherche [020]
LocalisationFonds IRD [F B010070094]
Identifiant IRDfdi:010070094
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010070094

Export des données

Disponibilité des documents

Télechargment fichier PDF téléchargeable

Lien sur le Web lien chez l'éditeur

Accès réservé en accès réservé

HAL en libre accès sur HAL

Accès aux documents originaux :

Le FDI est labellisé CollEx

Accès direct

Bureau du chercheur

Site de la documentation

Espace intranet IST (accès réservé)

Suivi des publications IRD (accès réservé)

Mentions légales

Services Horizon

Poser une question

Consulter l'aide en ligne

Déposer une publication (accès réservé)

S'abonner au flux RSS

Voir les tableaux chronologiques et thématiques

Centres de documentation


Montpellier (centre IRD)

Montpellier (MSE)









La Paz