@article{fdi:010073802,
  title = {{I}mpact of intraseasonal wind bursts on sea surface temperature variability in the far eastern tropical {A}tlantic {O}cean during boreal spring 2005 and 2006 : focus on the mid-{M}ay 2005 event},
  author = {{H}erbert, {G}a{\¨e}lle and {B}ourl{\`e}s, {B}ernard},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he impact of boreal spring intraseasonal wind bursts on sea surface temperature variability in the eastern tropical {A}tlantic {O}cean in 2005 and 2006 is investigated using numerical simulation and observations. {W}e especially focus on the coastal region east of 5 degrees {E} and between the {E}quator and 7 degrees {S} that has not been studied in detail so far. {F}or both years, the southerly wind anomalies induced cooling episodes through (i) upwelling processes, (ii) vertical mixing due to the vertical shear of the current, and for some particular events (iii) a decrease in incoming surface shortwave radiation. {T}he strength of the cooling episodes was modulated by subsurface conditions affected by the arrival of {K}elvin waves from the west influencing the depth of the thermocline. {O}nce impinging the eastern boundary, the {K}elvin waves excited westward-propagating {R}ossby waves, which combined with the effect of enhanced westward surface currents contributed to the westward extension of the cold water. {A} particularly strong wind event occurred in mid-{M}ay 2005 and caused an anomalous strong cooling off {C}ape {L}opez and in the whole eastern tropical {A}tlantic {O}cean. {F}rom the analysis of oceanic and atmospheric conditions during this particular event, it appears that anomalously strong boreal spring wind strengthening associated with anomalously strong {H}adley cell activity prematurely triggered the onset of coastal rainfall in the northern {G}ulf of {G}uinea, making it the earliest over the 1998-2008 period. {N}o similar atmospheric conditions were observed in {M}ay over the 1998-2008 period. {I}t is also found that the anomalous oceanic and atmospheric conditions associated with the event exerted a strong influence on rainfall off northeast {B}razil. {T}his study highlights the different processes through which the wind power from the {S}outh {A}tlantic is brought to the ocean in the {G}ulf of {G}uinea and emphasizes the need to further document and monitor the {S}outh {A}tlantic region.},
  keywords = {{ATLANTIQUE} {EST} ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{O}cean {S}cience},
  volume = {14},
  numero = {4},
  pages = {849--869},
  ISSN = {1812-0784},
  year = {2018},
  DOI = {10.5194/os-14-849-2018},
  URL = {https://www.documentation.ird.fr/hor/fdi:010073802},
}