TY - JOUR T1 - Subsurface fine scale patterns in an anticyclonic eddy off Cap-Vert peninsula observed from glider measurements A1 - Kolodziejczyk,Nicolas A1 - Testor,Pierre A1 - Lazar,Alban A1 - Echevin,Vincent A1 - Krahmann,Gerd A1 - Chaigneau,Alexis A1 - Gourcuff,Claire A1 - Wade,Malick A1 - Faye,Saliou A1 - Estrade,Philippe A1 - Capet,Xavier A1 - Mortier,Laurent A1 - Brehmer,Patrice A1 - Schuette,Florian A1 - Karstensen,Johannes AD - Univ Paris 06, Sorbonne Univ UPMC, CNRS, IRD,MNHN,LOCEAN Lab, Paris, France. AD - Univ Brest, LOPS Lab, CNRS, IRD,Ifremer,IUEM, Rue Dumont dUrville, Plouzane, France. AD - Helmholtz Ctr Ocean Res Kiel GEOMAR, Kiel, Germany. AD - Univ Toulouse, LEGOS, CNRS, CNES,IRD,UPS, Toulouse, France. AD - Univ Gaston Berger, Lab Sci Atmosphere & Ocean, St Louis, Senegal. AD - Ctr Rech Oceanog Dakar Thiaroye, Inst Senegalais Rech Agr, Dakar, Senegal. AD - UCAD, LPAOSF, IRD, Dakar, Senegal. AD - Inst Rech Dev, Dakar, Senegal. UR - https://archimer.ifremer.fr/doc/00450/56162/ DO - 10.1029/2018JC014135 KW - submesoscale KW - stirring KW - tropical Atlantic KW - meoscale eddy KW - glider measurements KW - OMZ N2 - Glider measurements acquired along 4 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°N off the continental shelf and propagated north‐west towards the Cape Verde islands. At depth, between 100‐400 m, 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(10‐30 km) relatively small with respect to the eddy radius of O(150 km). The vertical scales of O(5‐100 m) were associated to density‐compensated gradient. Spectra of salinity and oxygen along isopycnals revealed a slope of around k‐2 in the 10‐100 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. Y1 - 2018/09 PB - Amer Geophysical Union JF - Journal Of Geophysical Research-oceans SN - 2169-9275 VL - 123 IS - 9 SP - 6312 EP - 6329 ID - 56162 ER -