@article{fdi:010066799,
  title = {{S}patial and seasonal patterns of fine-scale to mesoscale upper ocean dynamics in an {E}astern {B}oundary {C}urrent {S}ystem},
  author = {{G}rados, {D}. and {B}ertrand, {A}rnaud and {C}olas, {F}ran{\c{c}}ois and {E}chevin, {V}incent and {C}haigneau, {A}lexis and {G}utierrez, {D}. and {V}argas, {G}. and {F}ablet, {R}onan},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he physical forcing of the ocean surface includes a variety of energetic processes, ranging from internal wave ({IW}) to submesoscale and mesoscale, associated with characteristic horizontal scales. {W}hile the description of mesoscale ocean dynamics has greatly benefited from the availability of satellite data, observations of finer scale patterns remain scarce. {R}ecent studies showed that the vertical displacements of the oxycline depth, which separates the well-mixed oxygenated surface layer from the less oxygenated deeper ocean, estimated by acoustics, provide a robust proxy of isopycnal displacements over a wide range of horizontal scales. {U}sing a high-resolution and wide-range acoustic data set in the {N}orthern {H}umboldt {C}urrent {S}ystem ({NHCS}) off {P}eru, the spatial and temporal patterns of fine-scale-tomesoscale upper ocean dynamics are investigated. {T}he spectral content of oxycline/pycnocline profiles presents patterns characteristic of turbulent flows, from the mesoscale to the fine scale, and an energization at the {IW} scale (2 km-200 m). {O}n the basis of a typology performed on 35,000 structures we characterized six classes of physical structures according to their shape and scale range. {T}he analysis reveals the existence of distinct features for the fine-scale range below similar to 2-3 km, and clearly indicates the existence of intense {IW} and submesoscale activity over the entire {NHCS} region. {S}tructures at scales smaller than 2 km were more numerous and energetic in spring than in summer. {T}heir spatiotemporal variability supports the interpretation that these processes likely relate to {IW} generation by interactions between tidal flows, stratification and the continental slope. {G}iven the impact of the physical forcing on the biogeochemical and ecological dynamics in {EBUS}, these processes should be further considered in future ecosystem studies based on observations and models. {T}he intensification of upper ocean stratification resulting from climate change makes such high-resolution analyses even more critical.},
  keywords = {{PEROU} ; {PACIFIQUE}},
  booktitle = {},
  journal = {{P}rogress in {O}ceanography},
  volume = {142},
  numero = {},
  pages = {105--116},
  ISSN = {0079-6611},
  year = {2016},
  DOI = {10.1016/j.pocean.2016.02.002},
  URL = {https://www.documentation.ird.fr/hor/fdi:010066799},
}