@article{fdi:010061589,
  title = {{I}nfluence of recent stratification changes on {ENSO} stability in a conceptual model of the {E}quatorial {P}acific},
  author = {{T}hual, {S}. and {D}ewitte, {B}oris and {A}n, {S}.{I}. and {I}llig, {S}erena and {A}youb, {N}.},
  editor = {},
  language = {{ENG}},
  abstract = {{C}hanges in the mean circulation of the equatorial {P}acific {O}cean partly control the strong decadal modulation of {E}l {N}ino-{S}outhern {O}scillation ({ENSO}). {T}his relationship is considered from the linear stability of a conceptual recharge/discharge model with parameters tuned from the observed mean state. {W}hereas decadal changes in the mean thermocline depth alone are usually considered in conceptual {ENSO} models, here focus is given to decadal changes in the mean stratification of the entire upper ocean (e.g., the mean thermocline depth, intensity, and thickness). {T}hose stratification changes modify the projection of wind stress forcing momentum onto the gravest ocean baroclinic modes. {T}heir influence on the simulated frequency and growth rate is comparable in intensity to the one of usual thermodynamic and atmospheric feedbacks, while they have here a secondary effect on the spatial structure and propagation of {SST} anomalies. {T}his sensitivity is evidenced in particular for the climate shift of the 1970s in the {S}imple {O}cean {D}ata {A}ssimilation ({SODA}) dataset, as well as in a preindustrial simulation of the {G}eophysical {F}luid {D}ynamics {L}aboratory ({GFDL}) model showing stratification changes similar to the ones after 2000. {D}espite limitations of the linear stability approach, conclusions on the sensitivity to stratification may be extended to interpret the modulation and diversity of {ENSO} in observations and in general circulation models.},
  keywords = {{INTERACTION} {OCEAN} {ATMOSPHERE} ; {CIRCULATION} {OCEANIQUE} ; {UPWELLING} ; {TEMPERATURE} {DE} {SURFACE} ; {ANOMALIE} {DE} {TEMPERATURE} ; {THERMOCLINE} ; {MODELISATION} ; {CHANGEMENT} {CLIMATIQUE} ; {PACIFIQUE} ; {PACIFIQUE} {EQUATORIAL}},
  booktitle = {},
  journal = {{J}ournal of {C}limate},
  volume = {26},
  numero = {13},
  pages = {4790--4802},
  ISSN = {0894-8755},
  year = {2013},
  DOI = {10.1175/{JCLI}-{D}-12-00363.1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010061589},
}