@article{fdi:010062922,
  title = {{T}he central {P}acific {E}l {N}ino intraseasonal {K}elvin wave},
  author = {{M}osquera-{V}asquez, {K}. and {D}ewitte, {B}oris and {I}llig, {S}erena},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n this study, we document and interpret the characteristics of the {I}ntra-seasonal {K}elvin wave ({ISK}w) in the {P}acific over the 1989–2011 period, based on observations, a linear model, and the outputs of an {O}cean {G}eneral {C}irculation {M}odel ({OGCM}). {W}e focus on the wave activity during the {C}entral {P}acific ({CP}) {E}l {N}iño events contrasting with the extraordinary {E}l {N}iño of 1997/1998. {W}e find that the {ISK}w activity is enhanced in {A}ustral summer (spring) in the central {P}acific (west of ∼120°{W}) during {CP} {E}l {N}iño events. {T}he linear model experiment indicates that the {A}ustral summer peak is wind-forced, while the {A}ustral spring peak is not and consequently results from nonlinear processes. {I}n addition, a strong dissipation of the {ISK}ws is observed east of 120°{W} which cannot be accounted for by a linear model using a {R}ayleigh friction. {A} vertical and horizontal mode decomposition of the {OGCM} simulation further confirms the sharp changes in characteristics of the {ISK}ws as well as the reflection of the latter into first-meridional {R}ossby wave at the longitude where the maximum zonal gradient of the thermocline is found (∼120°{W}). {O}ur analysis suggests that the confinement of {CP} {E}l {N}iño warming in the central {P}acific may result from the reinforcement of the zonal gradient in stratification associated with the {L}a {N}iña-like conditions since the late of the 1990s, leading to scattering of the energy of the {ISK}ws in the eastern {P}acific.},
  keywords = {{EL} {NINO} ; {CIRCULATION} {OCEANIQUE} ; {HYDRODYNAMIQUE} ; {TEMPERATURE} {DE} {SURFACE} ; {THERMOCLINE} ; {FORCING} ; {VARIATION} {INTERANNUELLE} ; {MODELISATION} ; {PACIFIQUE}},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch},
  volume = {119},
  numero = {10},
  pages = {6605–6621},
  year = {2014},
  DOI = {10.1002/2014{JC}010044},
  URL = {https://www.documentation.ird.fr/hor/fdi:010062922},
}