Surface signature of Mediterranean water eddies in a long-term high-resolution simulation - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Deep Sea Research Part I: Oceanographic Research Papers Année : 2017

Surface signature of Mediterranean water eddies in a long-term high-resolution simulation

Résumé

We study the surface signatures of Mediterranean water eddies (Meddies) in the context of a regional, primitive equations model simulation (using the Regional Oceanic Modeling System, ROMS). This model simulation was previously performed to study the mean characteristics and pathways of Meddies during their evolution in the Atlantic Ocean. The advantage of our approach is to take into account different physical mechanisms acting on the evolution of Meddies and their surface signature, having full information on the 3D distribution of all physical variables of interest. The evolution of around 90 long-lived Meddies (whose lifetimes exceeded one year) was investigated. In particular, their surface signature was determined in sea-surface height, temperature and salinity. The Meddy-induced anomalies were studied as a function of the Meddy structure and of the oceanic background. We show that the Meddies can generate positive anomalies in the elevation of the oceanic free-surface and that these anomalies are principally related to the Meddies potential vorticity structure at depth (around 1000 m below the sea-surface). On the contrary, the Meddies thermohaline surface signatures proved to be mostly dominated by local surface conditions and little correlated to the Meddy structure at depth. This work essentially points out that satellite altimetry is the most suitable approach to track subsurface vortices from observations of the sea-surface.
Fichier principal
Vignette du fichier
52220.pdf (2.78 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

insu-03682728 , version 1 (18-08-2023)

Identifiants

Citer

D. Ciani, X. Carton, A. C. Barbosa Aguiar, A. Peliz, I. Bashmachnikov, et al.. Surface signature of Mediterranean water eddies in a long-term high-resolution simulation. Deep Sea Research Part I: Oceanographic Research Papers, 2017, 130, pp.12-29. ⟨10.1016/j.dsr.2017.10.001⟩. ⟨insu-03682728⟩
22 Consultations
2 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More