@article{PAR00010410,
  title = {{A}ir-sea interaction in the {G}ulf of {G}uinea at intraseasonal time-scales : wind bursts and coastal precipitation in boreal spring},
  author = {{L}educ-{L}eballeur, {M}. and de {C}oetlogon, {G}. and {E}ymard, {L}aurence},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he role of airsea interaction in the boreal spring precipitation of the {W}est {A}frican monsoon is explored through the wind variability in the {G}ulf of {G}uinea. {L}inear regressions are performed in {M}ay{J}une during the decade 20002009 to investigate the origin and effect of the surface wind strengthening north of the {E}quator. {I}t appears that the equatorial sea-surface temperature cooling intensifies a surface-wind equatorial divergence/coastal convergence circulation, and generates a cross-equatorial pressure gradient, which both strengthen the southerlies north of the {E}quator. {T}his increases subsidence above the ocean and convection in the northern {G}ulf of {G}uinea. {I}n addition, an abrupt change is observed in the surface wind pattern in the eastern equatorial {A}tlantic ({EEA}) between {A}pril and {J}uly. {T}o investigate the transition mechanisms, a reference date is defined as the date when the surface wind north of the {E}quator becomes and remains stronger than south of the {E}quator. {T}hus the maintenance of strong southerlies north of the {E}quator is linked to a coincident installation of a deep circulation on the whole troposphere and a northward shift of the low atmospheric local circulation. {T}he resulting sharp seasonal transition coincides each year with a southeasterly wind burst, suggesting that the equatorial {SST} cooling plays a role in the precipitation along the {A}frican coast during boreal spring.},
  keywords = {{W}est {A}frican monsoon ; tropical {A}tlantic ; {GOLFE} {DE} {GUINEE}},
  booktitle = {},
  journal = {{Q}uarterly {J}ournal of the {R}oyal {M}eteorological {S}ociety},
  volume = {139},
  numero = {671},
  pages = {387--400},
  ISSN = {0035-9009},
  year = {2013},
  DOI = {10.1002/qj.1981},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00010410},
}