@article{fdi:010068127, title = {{S}easonal influence of the sea surface temperature on the low atmospheric circulation and precipitation in the eastern equatorial {A}tlantic}, author = {{M}eynadier, {R}. and de {C}oetlogon, {G}. and {L}educ-{L}eballeur, {M}. and {E}ymard, {L}aurence and {J}anicot, {S}erge}, editor = {}, language = {{ENG}}, abstract = {{T}he air-sea interaction in the {G}ulf of {G}uinea and its role in setting precipitation at the {G}uinean coast is investigated in the present paper. {T}his study is based on satellite observations and {WRF} simulations forced by different sea surface temperature ({SST}) patterns. {I}t shows that the seasonal cold tongue setup in the {G}ulf of {G}uinea, along with its very active northern front, tends to strongly constrain the low level atmospheric dynamics between the equator and the {G}uinean coast. {U}nderlying mechanisms including local {SST} effect on the marine boundary layer stability and hydrostatically-changed meridional pressure gradient through changes in {SST} gradient are quantified in {WRF} regarding observations and {CFSR} reanalyses. {T}heses mechanisms strongly impact moisture flux convergence near the coast, leading to the installation of the first rainy season of the {W}est {A}frican {M}onsoon ({WAM}) system. {T}he current study details the mechanisms by which the {A}tlantic {E}quatorial cold tongue plays a major role in the pre-onset of the boreal {WAM}.}, keywords = {{A}ir-sea interaction ; {E}astern equatorial {A}tlantic ; {W}ater cycle ; {R}egional climate ; {ATLANTIQUE} {EST} ; {ZONE} {EQUATORIALE} ; {GUINEE} ; {GUINEE} {GOLFE}}, booktitle = {}, journal = {{C}limate {D}ynamics}, volume = {47}, numero = {3-4}, pages = {1127--1142}, ISSN = {0930-7575}, year = {2016}, DOI = {10.1007/s00382-015-2892-7}, URL = {https://www.documentation.ird.fr/hor/fdi:010068127}, }