@article{fdi:010086920,
  title = {{M}odulation of the {E}astern {E}quatorial {P}acific seasonal cycle by tropical instability waves},
  author = {{M}aillard, {L}. and {B}oucharel, {J}. and {S}tuecker, {M}. {F}. and {J}in, {F}. {F}. and {R}enault, {L}ionel},
  editor = {},
  language = {{ENG}},
  abstract = {{F}eedbacks from tropical instability waves ({TIW}s) on the seasonal cycle of the eastern {P}acific {O}cean are studied using two eddy-rich ocean simulations, with and without {TIW}s. {B}y warming the equatorial waters by up to 0.4 degrees {C} through nonlinear advection in boreal summer and fall, {TIW}s reduce the amplitude of the seasonal cycle in upper ocean temperatures. {I}n addition, {TIW}s stabilize the upper part of the {E}quatorial {U}ndercurrent ({EUC}) through enhanced barotropic energy conversion, leading to a year-round weakening by -0.15 m s(-1) and preventing an unrealistic re-intensification in boreal fall usually found in non-eddy resolving models. {A} coarser simulation at 1-degree horizontal resolution fails to reproduce the {TIW}-induced nonlinear warming of equatorial waters, but succeeds in inhibiting the {EUC} re-intensification. {T}his suggests a threshold effect in {TIW} strength, associated with the model's ability to simulate eddies, which may be responsible for long-standing biases displayed by global climate models in this region.},
  keywords = {eastern equatorial {P}acific ; tropical instability waves ; nonlinear dynamics ; rectification effects ; {PACIFIQUE} ; {ZONE} {EQUATORIALE} ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{G}eophysical {R}esearch {L}etters},
  volume = {49},
  numero = {23},
  pages = {e2022{GL}100991 [10 ]},
  ISSN = {0094-8276},
  year = {2022},
  DOI = {10.1029/2022gl100991},
  URL = {https://www.documentation.ird.fr/hor/fdi:010086920},
}