@article{fdi:010049457,
  title = {{I}ntraseasonal variability of the ocean - atmosphere coupling in the {G}ulf of {G}uinea during boreal spring and summer},
  author = {{C}oetlogon de, {G}. and {J}anicot, {S}erge and {L}azar, {A}lban},
  editor = {},
  language = {{ENG}},
  abstract = {{S}tatistical analyses of the satellite {TMI} sea-surface temperature ({SST}) and {Q}uik{SCAT} surface winds in boreal spring and summer are performed to investigate the intraseasonal variability of air sea interactions in die {G}ulf of {G}uinea {T}here, empirical orthogonal function decomposition shows the existence of peaks around {IS} days. and their lagged cross-correlation the signature of an expected 5-day lag wind forcing and 3-day lag strong negative {SST} feedback {L}agged linear regressions are performed onto a reference {SST} index of the cold tongue northern front in the {G}ulf of {G}uinea. {A} cold {SST} anomaly covering the equatorial and coastal upwelling is forced after about one week by stronger-than-usual south-easterlies linked to the {S}i {H}elena anticyclone. suggesting that intraseasonal variability in the {G}ull of {G}uinea is connected to large-scale fluctuations in the {S}outh {A}tlantic {W}ithin about 5 degrees {S} and 5 degrees {N}, two retroactions between {SST} and surface wind appear to dominate near-surface atmosphere conditions {W}hen the wind leads the {SST}. stronger monsoonal winds north of 2 degrees {N} are partly sustained by die developing {SST} anomaly and bring more humidity and rainfall toward the continent {W}hen the {SST} leads {L}ie wind, a reversal of anomalous winds is observed mainly south of 2 degrees {N}. closing a negative feedback loop with a biweekly periodicity {E}ventually. further in with an ocean model emphasizes the contribution of the horizontal advection in shaping these intraseasonal {SST} signals {T}he contribution of vertical processes may also be important but was more difficult to estimate {C}opyright ({C}) 2010 {R}oyal {M}eteorological {S}ociety},
  keywords = {air-sea interactions ; statistical analysis},
  booktitle = {},
  journal = {{Q}uarterly {J}ournal of the {R}oyal {M}eteorological {S}ociety},
  volume = {136},
  numero = {s1},
  pages = {426--441},
  ISSN = {0035-9009},
  year = {2010},
  DOI = {10.1002/qj.554},
  URL = {https://www.documentation.ird.fr/hor/fdi:010049457},
}