@article{fdi:010066258,
  title = {{I}nterannual variability in the {S}outh-{E}ast {A}tlantic {O}cean, focusing on the {B}enguela {U}pwelling {S}ystem : remote versus local forcing},
  author = {{B}achelery, {M}. {L}. and {I}llig, {S}erena and {D}adou, {I}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e investigate the respective roles of equatorial remote ({E}quatorial {K}elvin {W}aves) and local atmospheric (wind, heat fluxes) forcing on coastal variability in the {S}outh-{E}ast {A}tlantic {O}cean extending up to the {B}enguela {U}pwelling {S}ystem ({BUS}) over the 2000-2008 period. {W}e carried out a set of six numerical experiments based on a regional ocean model, that differ only by the prescribed forcing (climatological or total) at surface and lateral boundaries. {R}esults show that at subseasonal timescales (<100 days), the coastal oceanic variability (currents, thermocline, and sea level) is mainly driven by local forcing, while at interannual timescales it is dominated by remote equatorial forcing. {A}t interannual timescales (13-20 months), remotely forced {C}oastal-{T}rapped {W}aves ({CTW}) propagate poleward along the {A}frican southwest coast up to the northern part of the {BUS} at 24 degrees {S}, with phase speeds ranging from 0.8 to 1.1 m.s(-1). {W}e show that two triggering mechanisms limit the southward propagation of {CTW}: interannual variability of the equatorward {B}enguela {C}urrent prescribed at the model's southern boundary (30 degrees {S}) and variability of local atmospheric forcing that modulates the magnitude of observed coastal interannual events. {W}hen local wind stress forcing is in (out) of phase, the magnitude of the interannual event increases (decreases). {F}inally, dynamical processes associated with {CTW} propagations are further investigated using heat budget for two intense interannual events in 2001 and 2003. {R}esults show that significant temperature anomalies (2 degrees {C}), that are mostly found in the subsurface, are primarily driven by alongshore and vertical advection processes.},
  keywords = {{B}enguela {U}pwelling {S}ystem ; interannual variability model ; experimentation ; coastal-trapped waves ; local atmospheric forcing ; equatorial connexion ; {ATLANTIQUE} {SUD} {EST} ; {BENGUELA} ; {AFRIQUE} {SUBSAHARIENNE}},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {O}ceans},
  volume = {121},
  numero = {1},
  pages = {284--310},
  ISSN = {2169-9275},
  year = {2016},
  DOI = {10.1002/2015jc011168},
  URL = {https://www.documentation.ird.fr/hor/fdi:010066258},
}