@article{fdi:010062146,
  title = {{Z}onal structure and variability of the {W}estern {P}acific dynamic warm pool edge in {CMIP}5},
  author = {{B}rown, {J}.{N}. and {L}anglais, {C}. and {M}aes, {C}hristophe},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he equatorial edge of the {W}estern {P}acific {W}arm {P}ool is operationally identified by one isotherm ranging between 28° and 29 °{C}, chosen to align with the interannual variability of strong zonal salinity gradients and the convergence of zonal ocean currents. {T}he simulation of this edge is examined in 19 models from the {W}orld {C}limate {R}esearch {P}rogram {C}oupled {M}odel {I}ntercomparison {P}roject {P}hase 5 ({CMIP}5), over the historical period from 1950 to 2000. {T}he dynamic warm pool edge ({DWPE}), where the zonal currents converge, is difficult to determine from limited observations and biased models. {A} new analysis technique is introduced where a proxy for {DWPE} is determined by the isotherm that most closely correlates with the movements of the strong salinity gradient. {I}t can therefore be a different isotherm in each model. {T}he {DWPE} is simulated much closer to observations than if a direct temperature-only comparison is made. {A}spects of the {DWPE} remain difficult for coupled models to simulate including the mean longitude, the interannual excursions, and the zonal convergence of ocean currents. {S}ome models have only very weak salinity gradients trapped to the western side of the basin making it difficult to even identify a {DWPE}. {T}he model’s {DWPE} are generally 1–2 °{C} cooler than observed. {I}n line with theory, the magnitude of the zonal migrations of the {DWPE} are strongly related to the amplitudes of the {N}ino3.4 {SST} index. {N}evertheless, a better simulation of the mean location of the {DWPE} does not necessarily improve the amplitude of a model’s {ENSO}. {I}t is also found that in a few models ({CSIROM}k3.6, inmcm and inmcm4-esm) the warm pool displacements result from a net heating or cooling rather than a zonal advection of warm water. {T}he simulation of the {DWPE} has implications for {ENSO} dynamics when considering {ENSO} paradigms such as the delayed action oscillator mechanism, the {A}dvective-{R}eflective oscillator, and the zonal-advective feedback. {T}hese are also discussed in the context of the {CMIP}5 simulations.},
  keywords = {{INTERACTION} {OCEAN} {ATMOSPHERE} ; {CIRCULATION} {OCEANIQUE} ; {COURANT} {EQUATORIAL} ; {MASSE} {D}'{EAU} ; {THERMOCLINE} ; {TEMPERATURE} {DE} {SURFACE} ; {SALINITE} ; {MODELISATION} ; {VARIATION} {INTERANNUELLE} ; {PACIFIQUE} ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{C}limate {D}ynamics},
  volume = {42},
  numero = {11-12},
  pages = {3061--3076},
  ISSN = {0930-7575},
  year = {2014},
  DOI = {10.1007/s00382-013-1931-5},
  URL = {https://www.documentation.ird.fr/hor/fdi:010062146},
}