@article{fdi:010070464,
  title = {{R}ole of interannual {K}elvin wave propagations in the equatorial {A}tlantic on the {A}ngola {B}enguela current system},
  author = {{I}mbol {K}oungue, {R}.{A}. and {I}llig, {S}erena and {R}ouault, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he link between equatorial {A}tlantic {O}cean variability and the coastal region of {A}ngola-{N}amibia is investigated at interannual time scales from 1998 to 2012. {A}n index of equatorial {K}elvin wave activity is defined based on {P}rediction and {R}esearch {M}oored {A}rray in the {T}ropical {A}tlantic ({PIRATA}). {A}long the equator, results show a significant correlation between interannual {PIRATA} monthly dynamic height anomalies, altimetric monthly {S}ea {S}urface {H}eight {A}nomalies ({SSHA}), and {SSHA} calculated with an {O}cean {L}inear {M}odel. {T}his allows us to interpret {PIRATA} records in terms of equatorial {K}elvin waves. {E}stimated phase speed of eastward propagations from {PIRATA} equatorial mooring remains in agreement with the linear theory, emphasizing the dominance of the second baroclinic mode. {S}ystematic analysis of all strong interannual equatorial {SSHA} shows that they precede by 1–2 months extreme interannual {S}ea {S}urface {T}emperature {A}nomalies along the {A}frican coast, which confirms the hypothesis that major warm and cold events in the {A}ngola-{B}enguela current system are remotely forced by ocean atmosphere interactions in the equatorial {A}tlantic. {E}quatorial wave dynamics is at the origin of their developments. {W}ind anomalies in the {W}estern {E}quatorial {A}tlantic force equatorial downwelling and upwelling {K}elvin waves that propagate eastward along the equator and then poleward along the {A}frican coast triggering extreme warm and cold events, respectively. {A} proxy index based on linear ocean dynamics appears to be significantly more correlated with coastal variability than an index based on wind variability. {R}esults show a seasonal phasing, with significantly higher correlations between our equatorial index and coastal {SSTA} in {O}ctober–{A}pril season.},
  keywords = {{ATLANTIQUE} ; {ZONE} {EQUATORIALE} ; {ANGOLA}},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {O}ceans},
  volume = {122},
  numero = {6},
  pages = {4685--4703},
  year = {2017},
  DOI = {10.1002/2016{JC}012463},
  URL = {https://www.documentation.ird.fr/hor/fdi:010070464},
}