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| Barbosa Aguiar, Ana; Peliz, A.; Neves, F.; Bashmachnikov, I.; Carton, Xavier. |
| We use cross-slope sections of direct current observations together with a high resolution numerical simulation to revisit estimates of transports and entrainment in the Gulf of Cadiz. We provide a three dimensional picture of the outflow from the Mediterranean into the intermediate layers of the Atlantic. In the model, the time-averaged Mediterranean Undercurrent is characterised by two cores of zonal velocity at 8°30′8°30′W: one at 500 m (in the σ1σ1 interval 31.6-31.831.6-31.8 kg m-3) and another around 1100 m (∼32.2∼32.2 kg m-3) with maximum westward velocity of 0.36 m s-1. A single well defined vein of saltier and warmer water (salinity maximum ∼36.9∼36.9 psu, 1 psu = 1 kg salt/1000 kg seawater) is found attached to the slope, centred at 1300 m... |
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| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00238/34908/33221.pdf |
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| Ciani, Daniele; Carton, Xavier; Aguiar, A. C. Barbosa; Peliz, A.; Bashmachnikov, I.; Ienna, F.; Chapron, Bertrand; Santoleri, R.. |
| 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... |
| Tipo: Text |
Palavras-chave: Subsurface Anticyclones; Mediterranean water eddies; Satellite detection. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00405/51672/52220.pdf |
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| Santos, Amp; Nieblas, Anne-elise; Verley, P.; Teles-machado, A.; Bonhommeau, Sylvain; Lett, C.; Garrido, S.; Peliz, A.. |
| The European sardine (Sardina pilchardus) is the most important small pelagic fishery of the Western Iberia Upwelling Ecosystem (WIUE). Recently, recruitment of this species has declined due to changing environmental conditions. Furthermore, controversies exist regarding its population structure with barriers thought to exist between the Atlantic-Iberian Peninsula, Northern Africa, and the Mediterranean. Few studies have investigated the transport and dispersal of sardine eggs and larvae off Iberia and the subsequent impact on larval recruitment variability. Here, we examine these issues using a Regional Ocean Modeling System climatology (1989-2008) coupled to the Lagrangian transport model, Ichthyop. Using biological parameters from the literature, we... |
| Tipo: Text |
Palavras-chave: Iberian Peninsula; Sardina pilchardus; Larval dispersal; Lagrangian transport; Ichthyop; Regional Ocean Modeling System. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00427/53814/54784.pdf |
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