%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Kolodziejczyk, N.
%A Testor, P.
%A Lazar, A.
%A Echevin, Vincent
%A Krahmann, G.
%A Chaigneau, Alexis
%A Gourcuff, C.
%A Wade, M.
%A Faye, S.
%A Estrade, P.
%A Capet, X.
%A Mortier, L.
%A Brehmer, Patrice
%A Schutte, F.
%A Karstensen, J.
%T Subsurface fine-scale patterns in an anticyclonic eddy off Cap-Vert Peninsula observed from glider measurements
%D 2018
%L fdi:010074167
%G ENG
%J Journal of Geophysical Research : Oceans
%@ 2169-9275
%K submesoscale ; stirring ; tropical Atlantic ; meoscale eddy ; glider ; measurements ; OMZ
%K ATLANTIQUE ; SENEGAL ; ZONE TROPICALE
%K CAP VERT PENNSULE ; CAP VERT ILES
%M ISI:000447552600017
%N 9
%P 6312-6329
%R 10.1029/2018jc014135
%U https://www.documentation.ird.fr/hor/fdi:010074167
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2021-06/010074167.pdf
%V 123
%W Horizon (IRD)
%X 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