Vianello P., Ternon Jean-François, Demarcq Hervé, Herbette Steven, Roberts M. J. (2020). Ocean currents and gradients of surface layer properties in the vicinity of the Madagascar Ridge (including seamounts) in the South West Indian Ocean. In :
Payne A. (ed.), Roberts M. (ed.), Marsac Francis (ed.), Noyon M. (ed.), Ternon Jean-François (ed.). Bio-physical coupling around three shallow seamounts in the South Western Indian Ocean, with regional comparisons based on modelling, remote sensing and observational studies. Deep-Sea Research Part II : Topical Studies in Oceanography, 176 (No spécial), art. 104816 [13 p.]. ISSN 0967-0645.
Titre du document
Ocean currents and gradients of surface layer properties in the vicinity of the Madagascar Ridge (including seamounts) in the South West Indian Ocean
Année de publication
2020
Auteurs
Vianello P., Ternon Jean-François, Demarcq Hervé, Herbette Steven, Roberts M. J.
In
Payne A. (ed.), Roberts M. (ed.), Marsac Francis (ed.), Noyon M. (ed.), Ternon Jean-François (ed.) Bio-physical coupling around three shallow seamounts in the South Western Indian Ocean, with regional comparisons based on modelling, remote sensing and observational studies
Source
Deep-Sea Research Part II : Topical Studies in Oceanography, 2020,
176 (No spécial), art. 104816 [13 p.] ISSN 0967-0645
This work is part of the MADRidge Project special issue which aims to describe pelagic ecosystems in the vicinity of three prominent shallow seamounts in the South West Indian Ocean: one here named MAD-Ridge (240 m below the surface) plus Walters Shoal (18 m) on the Madagascar Ridge, and La Perouse (60 m) on the abyssal plain east of Madagascar. The three span latitudes 20 degrees S and 33 degrees S, some 1500 km. The study provides the background oceanography for the once-off, multidisciplinary snapshot cruise studies around the seamounts. As life on seamounts is determined by factors such as summit depth, proximity to the light layers of the ocean, and the ambient circulation, a first description of regional spatial-field climatologies (16-22 years) and monthly along-ridge gradients of surface wind (driving force), water column properties of sea surface temperature, mixed layer depth, chlorophyll-a and eddy kinetic energy, plus ocean currents is provided. Being relevant to many applications in the study domain, these properties in particular reveal contrasting environments along the Madagascar Ridge and between the three seamounts that should drive biological differences. Relative to the other two seamounts, MAD-Ridge is in the more extreme situation, being at the end of the East Madagascar Current, where it experiences sturdy, albeit variable, currents and the frequent passing of mesoscale eddies.
Plan de classement
Limnologie / Océanographie : généralités [030]
;
Limnologie physique / Océanographie physique [032]
;
Limnologie biologique / Océanographie biologique [034]
Description Géographique
OCEAN INDIEN
Localisation
Fonds IRD [F B010079450]
Identifiant IRD
fdi:010079450
