@article{fdi:010061294,
  title = {{E}astern and {C}entral {P}acific {ENSO} and their relationships to the recharge/discharge oscillator paradigm},
  author = {{S}ingh, {A}. and {D}elcroix, {T}hierry},
  editor = {},
  language = {{ENG}},
  abstract = {{O}ne of the leading theories to explain the oscillatory nature of the {E}l {N}ino {S}outhern {O}scillation is the recharge-discharge oscillator paradigm, which roots on warm waters exchanged between the equatorial and off-equatorial regions. {T}his study tests the relevance of this theory to account for the {E}astern and recently mediated {C}entral {P}acific {E}l {N}ino events. {T}he recharge-discharge of the equatorial {P}acific, measured here as changes in {W}arm (> 20 degrees {C}) {W}ater {V}olume ({WWV}), is analysed using monthly 1993-2010 sea level anomaly (a proxy for {WWV}) obtained from altimetry, and a validated 1958-2007 {DRAKKAR} simulation. {A}n {A}gglomerative {H}ierarchical {C}lustering ({ARC}) technique performed on the observed and modelled {WWV} tendency shows the existence of five distinct clusters, which characterise the {E}astern {P}acific ({EP}) and {C}entral {P}acific ({CP}) {E}l {N}ino, {L}a {N}ina, after {EP} {E}l {N}ino and neutral conditions. {T}he {AHC} results, complemented with an analysis of lagged-regression analysis, and 3-month averages of typical {EP} and {CP} {E}l {N}ino events, indicate that the equatorial band {WWV} discharge during {CP} is not as pronounced as during {EP} {E}l {N}ino. {T}o understand the differences, we analysed the balance of horizontal mass transports accounting for changes in {WWV} tendency. {T}he analysis indicates an overall poleward transport during {EP} {E}l {N}ino, which is not the case during {CP} {E}l {N}ino. {I}nstead, a compensating effect with a poleward (equatorward) transport occurring in the western (eastern) {P}acific is evident, in line with changes in the zonal thermocline slopes occurring in the western (eastern) half of the basin. {T}he {WWV} changes are discussed with respect to the conceptual phases of the recharge-discharge oscillator paradigm.},
  keywords = {{ENSO} ; {T}ropical {P}acific ; {C}entral {P}acific {E}l {N}ino ; {R}echarge-discharge oscillator ; {S}ea level anomaly ; {W}arm water volume ; {OCEAN} {PACIFIQUE}},
  booktitle = {},
  journal = {{D}eep-{S}ea {R}esearch {P}art {I}. {O}ceanographic {R}esearch {P}apers},
  volume = {82},
  numero = {},
  pages = {32--43},
  ISSN = {0967-0637},
  year = {2013},
  DOI = {10.1016/j.dsr.2013.08.002},
  URL = {https://www.documentation.ird.fr/hor/fdi:010061294},
}