@article{fdi:010091213,
  title = {{I}nfluence of the remote equatorial dynamics on the interannual variability along the northern coast of the {G}ulf of {G}uinea},
  author = {{I}llig, {S}erena and {D}jakour{\'e}, {S}. and {M}itchodigni, {T}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his study explores the oceanic connection between the equatorial dynamics and the coastal variability along the northern coast of the {G}ulf of {G}uinea on interannual timescales, based on experiments with a high-resolution tropical {A}tlantic {O}cean model over 1958-2015. {E}quatorial {K}elvin waves, forced by wind-stress anomalies in the west-central equatorial basin, significantly control the interannual fluctuations of the coastal sea-level and subsurface temperature near the thermocline (>70%), leaving only a marginal role for the local forcing contribution. {T}he dynamical coastal response exhibits a clear propagative nature, with poleward propagations (0.75-1.2 m.s(-1)) from {C}ameroon to {L}iberia. {B}ecause the northern coast of the {G}ulf of {G}uinea is close to the equatorial waveguide, the coastal variability is influenced by both equatorially-forced coastal trapped waves and reflected equatorial {R}ossby waves. {F}urthermore, remote equatorial forcing explains more of the surface temperature variance for the coastal systems associated with clear upwelling characteristics such as {C}{\^o}te d'{I}voire and {G}hana, where subsurface/surface coupling is more efficient. {T}he surface thermal amplitude and timing is shaped by the coastal stratification and circulation and exhibits a marked seasonal modulation, so that the timing of the {S}ea {S}urface {T}emperature ({SST}) anomalies relative to the dynamical signature lacks consistency, making {SST} a less reliable variable for tracking coastal propagations in the {G}ulf of {G}uinea. {O}ur findings open the possibility of predicting interannual changes in coastal conditions off {C}{\^o}te d'{I}voire and {G}hana a few months in advance, to anticipate impacts on fish habitats and resources, and to facilitate proactive measures for sustainable management and conservation efforts.},
  keywords = {long wave propagation ; equatorial connection ; {G}ulf of {G}uinea ; interannual variability ; coastal upwelling ; regional ocean modeling ; {GOLFE} {DE} {GUINEE} ; {COTE} {D}'{IVOIRE} ; {GHANA} ; {ZONE} {EQUATORIALE}},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {O}ceans},
  volume = {129},
  numero = {8},
  pages = {e2024{JC}021011 [20 p.]},
  ISSN = {2169-9275},
  year = {2024},
  DOI = {10.1029/2024jc021011},
  URL = {https://www.documentation.ird.fr/hor/fdi:010091213},
}