@article{fdi:010077725,
  title = {{S}patio-temporal variability of the equatorial front in the eastern tropical {P}acific from remote sensing salinity data (2010-2015)},
  author = {{A}sto, {C}. and {C}haigneau, {A}lexis and {G}utierrez, {D}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n the eastern {P}acific, the {E}quatorial {F}ront ({EF}) separates the relatively cold and salty {E}quatorial {S}urface {W}ater to the {S}outh from the relatively warm and fresh {S}urface {T}ropical {W}ater to the {N}orth. {A}lthough previous studies have succinctly described the main {EF} characteristics, little is known about its spatial pattern and temporal variability beyond seasonal scale. {I}n this study, we used 5 years of remote-sensing sea surface salinity ({SSS}) data, acquired by {SMOS} in a synoptic and continuous manner, to describe the spatio-temporal variability of the haline {EF} ({HEF}). {A}fter validating the {SSS} satellite dataset with concomitant in situ data, we developed an algorithm based on maximum {SSS} gradients to automatically identify the {HEF} position on every {SMOS} {SSS} map. {T}his algorithm applied to the 4-day resolution {SMOS} {SSS} product, allows us to investigate the spatio-temporal variability of the {HEF} between 2010 and 2015. {S}easonally, west of the {G}alapagos {I}slands, the {HEF} is centered at 2 {N} and shows relatively weak meridional displacements. {I}n contrast, east of the {G}alapagos {A}rchipelago, the {HEF} varies on average between similar to 4 degrees {S} in spring and similar to 2 degrees {N} in autumn. {A}t intraseasonal scales, the {HEF} shows meridional fluctuations of +/- 1.25 degrees around its average position. {T}hese intraseasonal fluctuations are partly related to {K}elvin {W}aves, which was more noticeable since 2014. {O}ver the 5-year studied period, the {HEF} position showed a northward trend of 0.3-0.4 latitudinal degrees per year between 2010 and 2015. {H}owever, the relatively short time series does not permit to investigate whether this low-frequency trend is due to long-term variability or interdecadal fluctuations.},
  keywords = {{E}astern tropical pacific ; {E}quatorial front ; {S}ea surface salinity ; {D}etection algorithm ; {PACIFIQUE} ; {PEROU} ; {EQUATEUR} ; {ZONE} {TROPICALE} ; {ZONE} {EQUATORIALE}},
  booktitle = {},
  journal = {{D}eep-{S}ea {R}esearch {P}art {II} : {T}opical {S}tudies in {O}ceanography},
  volume = {169},
  numero = {{N}o {S}p{\'e}cial},
  pages = {art. 104640 [12 ]},
  ISSN = {0967-0645},
  year = {2019},
  DOI = {10.1016/j.dsr2.2019.104640},
  URL = {https://www.documentation.ird.fr/hor/fdi:010077725},
}