Horizon 1 1 17 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES Journal of Geophysical Research : Oceans 6312-6329 submesoscale stirring tropical Atlantic meoscale eddy glider measurements OMZ ATLANTIQUE SENEGAL ZONE TROPICALE CAP VERT PENNSULE CAP VERT ILES 2018 fdi:010074167 ENG Journal of Geophysical Research : Oceans 2169-9275 ISI:000447552600017 9 10.1029/2018jc014135 https://www.documentation.ird.fr/hor/fdi:010074167 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2021-06/010074167.pdf 123 Horizon (IRD) Glider measurements acquired along four transects between Cap-Vert Peninsula and the Cape Verde archipelago in the eastern tropical North Atlantic during March-April 2014 were used to investigate fine-scale stirring in an anticyclonic eddy. The anticyclone was formed near 12 degrees N off the continental shelf and propagated northwest toward the Cape Verde islands. At depth, between 100 and -400m, the isolated anticyclone core contained relatively oxygenated, low-salinity South Atlantic Central Water, while the surrounding water masses were saltier and poorly oxygenated. The dynamical and thermohaline subsurface environment favored the generation of fine-scale horizontal and vertical temperature and salinity structures in and around the core of the anticyclone. These features exhibited horizontal scales of O(10-30km) relatively small with respect to the eddy radius of O(150km). The vertical scales of O(5-100m) were associated to density-compensated gradient. Spectra of salinity and oxygen along isopycnals revealed a slope of around k(-2) in the 10- to 100-km horizontal scale range. Further analyses suggest that the fine-scale structures are likely related to tracer stirring processes. Such mesoscale anticyclonic eddies and the embedded fine-scale tracers in and around them could play a major role in the transport of South Atlantic Central Water masses and ventilation of the North Atlantic Oxygen Minimum Zone. 032 UR182 / UR254 / UR065 Sénégal