@article{fdi:010056623,
  title = {{V}ariability of the horizontal velocity structure in the upper 1600 m of the water column on the equator at 10 degrees {W}},
  author = {{B}unge, {L}. and {P}rovost, {C}. and {L}illy, {J}.{M}. and {D}'{O}rgeville {M} and {K}artavtseff, {A}. and {M}{\'e}lice, {J}ean-{L}uc},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his paper presents initial results from new velocity observations in the eastern part of the equatorial {A}tlantic {O}cean from a moored current-meter array. {D}uring the "{EQUALANT}" program (1999-2000), a mooring array was deployed around the equator near 10 {W} that recorded one year of measurements at various depths. {H}orizontal velocities were obtained in the upper 60 m from an upward-looking acoustic {D}oppler current profiler ({ADCP}) and at 13 deeper levels from current meters between 745 and 1525 m. {T}o analyze the quasiperiodic variability observed in these records, a wavelet-based technique was used. {Q}uasiperiodic oscillations having periods between 5 and 100 days were separated into four bands: 5-10, 10-20, 20-40, and 40-100 days. {T}he variability shows (i) a strong seasonality (the first half of the series is dominated by larger periods than the second one) and (ii) a strong dependence with depth (some oscillations are present in the entire water column while others are only present at certain depths). {F}or the oscillations that are present in the entire water column the origin of the forcing can be traced to the surface, while for the others the question of their origin remains open. {P}hase shifts at different depths generate vertical shears in the horizontal velocity component with relatively short vertical scales. {T}his is especially visible in long-duration events (>100 days) of the zonal velocity component. {C}omparison with a simultaneous lowered acoustic {D}oppler current profiler ({LADCP}) section suggests that some of these flows may be identified with equatorial deep jets. {A} striking feature is a strong vertical shear lasting about 7 months between 745 and 1000 m. {T}hese deep current-meter observations would then imply a few months of duration for the jets in this region.},
  keywords = {},
  booktitle = {},
  journal = {{J}ournal of {P}hysical {O}ceanography},
  volume = {36},
  numero = {7},
  pages = {1287--1304},
  ISSN = {0022-3670},
  year = {2006},
  DOI = {10.1175/{JPO}2908.1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010056623},
}