@article{fdi:010066218,
  title = {{I}ntraseasonal variability of tropical {A}tlantic sea-surface temperature : air-sea interaction over upwelling fronts},
  author = {{D}iakhate, {M}. and de {C}oetlogon, {G}. and {L}azar, {A}lban and {W}ade, {M}. and {G}aye, {A}. {T}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}ropical {A}tlantic sea-surface temperatures ({SST}s) maximum intraseasonal variability ({ISV}) and their interaction with local surface winds are investigated, applying statistical analysis to observations and to a recent coupled reanalysis over the 2000-2009 decade. {F}ive cores of strong {ISV} emerge, with standard deviation reaching about 1 degrees {C} in frontal areas of the three main upwelling systems: equatorial, {A}ngola-{B}enguela and {S}enegal-{M}auritania (the southern side of the {C}anary upwelling). {W}est of 10 degrees {W} along the {E}quator, a 20-60-day peak caused by tropical instability waves is shown to generate surface wind anomalies through the adjustment of the horizontal surface pressure gradient in addition to the modification of near-surface atmospheric stratification. {E}ast of 10 degrees {W} along the {E}quator, an intense biweekly oscillation increases the ocean and atmosphere {ISV}. {I}n the two coastal upwelling fronts, intraseasonal {SST} anomalies resemble each other. {T}hey are shown to be influenced by coastal {K}elvin waves in addition to large-scale wind forcing. {O}ver the {A}ngola-{B}enguela upwelling, coastal wind bursts controlling the {SST} {ISV} are associated with anomalously strong pressure patterns related to the {M}adden-{J}ulian {O}scillation, the {S}t {H}elena anticyclone and the {A}ntarctic {O}scillation. {I}n the {S}enegal-{M}auritania upwelling, the wind anomalies mainly linked to the {A}zores anticyclone in the southern front during {N}ovember to {M}ay appear to be connected to the {S}aharan heat-low in the northern front from {J}une to {S}eptember. {I}n all five regions and as expected for such upwelling regimes, vertical oceanic mixing represents the dominant term in the mixed-layer heat budget. {I}n the equatorial band, as found in previous studies, horizontal advection is equally important, while it appears surprisingly weak in coastal fronts. {F}inally, a striking result is the general lack of surface wind signal related to the {SST} {ISV} in the coastal upwellings.},
  keywords = {tropical {A}tlantic ; intraseasonal variability ; air-sea interaction ; {ATLANTIQUE} ; {SENEGAL} ; {MAURITANIE} ; {ANGOLA} ; {NAMIBIE} ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{Q}uarterly {J}ournal of the {R}oyal {M}eteorological {S}ociety},
  volume = {142},
  numero = {694},
  pages = {372--386},
  ISSN = {0035-9009},
  year = {2016},
  DOI = {10.1002/qj.2657},
  URL = {https://www.documentation.ird.fr/hor/fdi:010066218},
}