DOI: 10.1007/s00382-015-2892-7
Scopus记录号: 2-s2.0-84947424636
论文题名: Seasonal influence of the sea surface temperature on the low atmospheric circulation and precipitation in the eastern equatorial Atlantic
作者: Meynadier R. ; de Coëtlogon G. ; Leduc-Leballeur M. ; Eymard L. ; Janicot S.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 47, 期: 2017-03-04 起始页码: 1127
结束页码: 1142
语种: 英语
英文关键词: Air–sea interaction
; Eastern equatorial Atlantic
; Regional climate
; Water cycle
英文摘要: The air–sea interaction in the Gulf of Guinea and its role in setting precipitation at the Guinean coast is investigated in the present paper. This study is based on satellite observations and WRF simulations forced by different sea surface temperature (SST) patterns. It shows that the seasonal cold tongue setup in the Gulf of Guinea, along with its very active northern front, tends to strongly constrain the low level atmospheric dynamics between the equator and the Guinean coast. Underlying 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. Theses mechanisms strongly impact moisture flux convergence near the coast, leading to the installation of the first rainy season of the West African Monsoon (WAM) system. The current study details the mechanisms by which the Atlantic Equatorial cold tongue plays a major role in the pre-onset of the boreal WAM. © 2015, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53585
Appears in Collections: 过去全球变化的重建
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作者单位: LA, Toulouse, France; LATMOS-IPSL, Paris, France; LGGE, Grenoble, France; LOCEAN-IPSL, Paris, France
Recommended Citation:
Meynadier R.,de Coëtlogon G.,Leduc-Leballeur M.,et al. Seasonal influence of the sea surface temperature on the low atmospheric circulation and precipitation in the eastern equatorial Atlantic[J]. Climate Dynamics,2016-01-01,47(2017-03-04)