@article{fdi:010077921,
  title = {{I}nterannual coastal trapped waves in the {A}ngola-{B}enguela {U}pwelling {S}ystem and {B}enguela {N}ino and {N}ina events},
  author = {{B}achelery, {M}. {L}. and {I}llig, {S}erena and {R}ouault, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e investigate the dynamics of the interannual {C}oastal {T}rapped {W}aves ({CTW}) propagations along the southwestern {A}frican coast and their role in triggering {B}enguela {N}ino and {N}ina events from 1958 to 2008. {U}sing regional ocean model sensitivity experiments, we track equatorially-forced {CTW} down to the {S}outhern {B}enguela {U}pwelling {S}ystem ({SBUS}), where they account for 70% of the coastal sea level anomalies ({SLA}), temperature, and salinity variability. {W}e then decompose the model coastal variability into individual {CTW} modal contributions and identify periods of energetic downwelling and upwelling propagations. {A} composite analysis allows for documenting and quantifying the oceanic response (circulation, temperature, and salinity) on the shelf during the passage of remotely-forced {CTW}. {R}esults reveal that {N}orth of similar to 19 degrees {S}, the coastal interannual variability is dominated by the second and third {CTW} modes. {I}n the {BUS}, their amplitudes decrease and the interannual fluctuations are largely explained ( > 70%) by the faster and weakly-dissipative first {CTW} mode. {T}his dynamic explains the peculiar propagative pattern associated with {SLA} propagations, in which equatorially-forced fluctuations in the {SBUS} peak before the waves imprint the variability at similar to 19 degrees {S}. {T}he impact of {CTW} on the temperature in the {SBUS} is drastically lower than in the {NBUS} and {A}ngolan regions. {A}t last, we show that 71% of the extreme {B}enguela {N}ino and {N}ina events, in the surface layer, are associated with remotely-forced {CTW} propagations. {T}he coherence between our {CTW} index and these extreme events increases when detecting temperature anomalies in the sub-surface rather than at the sea surface.},
  keywords = {{C}oastal {T}rapped {W}aves ; {B}enguela {N}ino-{N}ina events ; {A}ngola-{B}enguela ; {U}pwelling {S}ystem ; {E}quatorial dynamics ; {ATLANTIQUE} ; {ZONE} {EQUATORIALE} ; {ANGOLA}},
  booktitle = {},
  journal = {{J}ournal of {M}arine {S}ystems},
  volume = {203},
  numero = {},
  pages = {art. 103262 [16 p.]},
  ISSN = {0924-7963},
  year = {2020},
  DOI = {10.1016/j.jmarsys.2019.103262},
  URL = {https://www.documentation.ird.fr/hor/fdi:010077921},
}