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| Kersale, Marion; Lamont, Tarron; Speich, Sabrina; Terre, Thierry; Laxenaire, Remi; Roberts, Mike J.; Van Den Berg, Marcel A.; Ansorge, Isabelle J.. |
| The eastern side of the South Atlantic Meridional overturning circulation Basin-wide Array (SAMBA) along 34.5 degrees S is used to assess the nonlinear, mesoscale dynamics of the Cape Basin. This array presently consists of current meter moorings and bottom mounted Current and Pressure recording Inverted Echo Sounders (CPIES) deployed across the continental slope. These data, available from September 2014 to December 2015, combined with satellite altimetry allow us to investigate the characteristics and the impact of mesoscale dynamics on local water mass distribution and cross-validate the different data sets. We demonstrate that the moorings are affected by the complex dynamics of the Cape Basin involving Agulhas rings, cyclonic eddies and anticyclonic... |
| Tipo: Text |
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| Ano: 2018 |
URL: http://archimer.ifremer.fr/doc/00456/56806/58671.pdf |
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| Capuano, Tonia Astrid; Speich, Sabrina; Carton, Xavier; Laxenaire, Remi. |
| This study evaluates the capability of eddy-permitting regional ocean models to reproduce the interocean exchange south of Africa. In this highly turbulent region, we show that the vertical structure of the horizontal flows need to be appropriately resolved to realistically advect thermocline water masses into the South Atlantic. Our results point out that a grid-spacing of 1/24 degrees on the horizontal and 50 m on the vertical homogeneously distributed are required to account for a correct transport of surface and subsurface water masses properties and their in-route transformation by mixing. Preliminary Lagrangian analyses highlight the primary role of the upper-ocean mesoscale eddies on water masses transport and fate, with a particular emphasis on... |
| Tipo: Text |
Palavras-chave: Eddy dynamics; Indo-Atlantic exchange; AAIW. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00600/71245/69616.pdf |
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