@article{fdi:010060752,
  title = {{I}ntraseasonal modulation of the surface cooling in the {G}ulf of {G}uinea},
  author = {{J}ouanno, {J}. and {M}arin, {F}r{\'e}d{\'e}ric and {P}enhoat, {Y}ves du and {M}olines, {J}.{M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A} regional numerical model of the tropical {A}tlantic {O}cean and observations are analyzed to investigate the intraseasonal fluctuations of the sea surface temperature at the equator in the {G}ulf of {G}uinea. {R}esults indicate that the seasonal cooling in this region is significantly shaped by short-duration cooling events caused by wind-forced equatorial waves: mixed {R}ossby- gravity waves within the 12-20-day period band, inertia gravity waves with periods below 11 days, and equatorially trapped {K}elvin waves with periods between 25 and 40 days. {I}n these different ranges of frequencies, it is shown that the wave-induced horizontal oscillations of the northern front of the mean cold tongue dominate the variations of mixed layer temperature near the equator. {B}ut the model mixed layer heat budget also shows that the equatorial waves make a significant contribution to the mixed layer heat budget through modulation of the turbulent cooling, especially above the core of the {E}quatorial {U}ndercurrent ({EUC}). {T}he turbulent cooling variability is found to be mainly controlled by the intraseasonal modulation of the vertical shear in the upper ocean. {T}his mechanism is maximum during periods of seasonal cooling, especially in boreal summer, when the surface {S}outh {E}quatorial {C}urrent is strongest and between 2 degrees {S} and the equator, where the presence of the {EUC} provides a background vertical shear in the upper ocean. {I}t applies for the three types of intraseasonal waves. {I}nertia-gravity waves also modulate the turbulent heat flux at the equator through vertical displacement of the core of the {EUC} in response to equatorial divergence and convergence.},
  keywords = {{GOLFE} {DE} {GUINEE}},
  booktitle = {},
  journal = {{J}ournal of {P}hysical {O}ceanography},
  volume = {43},
  numero = {2},
  pages = {382--401},
  ISSN = {0022-3670},
  year = {2013},
  DOI = {10.1175/jpo-d-12-053.1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010060752},
}