@article{fdi:010081113,
  title = {{M}esoscale variability in the boundaries of the oxygen minimum zone in the {E}astern {S}outh {P}acific : influence of intrathermocline eddies},
  author = {{A}uger, {P}ierre-{A}ma{\¨e}l and {B}ento, {J}. {P}. and {H}ormazabal, {S}. and {M}orales, {C}. {E}. and {B}ustamante, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he vertical variability in the oxygen minimum zone ({OMZ}) in the eastern {S}outh {P}acific ({ESP}; 0-40 degrees {S}) is characterized by the influence of anticyclonic intrathermocline eddies ({ITE}s), which are subsurface-intensified mesoscale features that are frequently generated in the coastal upwelling zone off {P}eru and {C}hile. {T}he unique lens-shaped signatures that {ITE}s leave on temperature, salinity, and dissolved oxygen vertical distributions are used as proxies to assess their influences on vertical {OMZ} boundaries and thickness. {D}ata from in situ profiles in the region ({W}orld {O}cean {D}atabase and {A}rgo databases) are used in correlation analyses between anomalous depths (and vertical displacements) of oxyclines and isopycnals/isotherms, together with an objective eddy detection method based on satellite altimetry to identify the location of such profiles (i.e., outside or inside cyclonic and anticyclonic eddies). {T}he results indicate that most of the vertical fluctuations in the climatological {OMZ} have a lens-shaped signature and that those at the mesoscale are largely due to {ITE}s. {ITE}s are a main driver of the upper oxycline variability in the coastal band, the coastal transition zone ({CTZ}, 3-10 degrees from the coast) and beyond at mid-latitudes (12-26 degrees {S}). {T}he influence of {ITE}s on the upper and lower oxycline variability is mostly observed within the horizontal (offshore) climatological boundary of the {OMZ}, suggesting that {ITE}s play a role in the {OMZ} offshore extension in the {ESP}. {ITE}s may produce mesoscale variations in the thickness of the surface-oxygenated layer, resulting in potential changes in prey-predator interactions and in food web functioning.},
  keywords = {{A}rgo floats ; {CTD}-{O} profiles ; fish habitat ; {OMZ} ; oxycline depth ; subsurface eddy ; {PEROU} ; {CHILI} ; {PACIFIQUE} {SUD}},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {O}ceans},
  volume = {126},
  numero = {2},
  pages = {e2019{JC}015272 [21p.]},
  ISSN = {2169-9275},
  year = {2021},
  DOI = {10.1029/2019jc015272},
  URL = {https://www.documentation.ird.fr/hor/fdi:010081113},
}