Equatorial upper-ocean dynamics and their interaction with the West African monsoon

被引：68

作者：

Brandt, Peter ^{[1
]}

Caniaux, Guy ^{[2
]}

Bourles, Bernard ^{[3
,4
]}

Lazar, Alban ^{[5
]}

Dengler, Marcus ^{[1
]}

Funk, Andreas ^{[1
]}

Hormann, Verena ^{[1
]}

Giordani, Herve ^{[2
]}

Marin, Frederic ^{[3
,6
]}

机构：

[1] Leibniz Inst Meereswissensch, IFM GEOMAR, D-24105 Kiel, Germany

[2] Meteo France, CNRS, URA 1357, CNRM,GAME, Toulouse, France

[3] Univ Toulouse, UPS OMP PCA, LEGOS, Toulouse, France

[4] CRHOB, IRD, LEGOS, Cotonou, Benin

[5] Univ Paris 06, LOCEAN IPSL, F-75252 Paris 05, France

[6] LEGOS, IRD, Toulouse, France

来源：

ATMOSPHERIC SCIENCE LETTERS | 2011年 / 12卷 / 01期

关键词：

equatorial Atlantic; cold tongue; West African monsoon; TROPICAL INSTABILITY WAVES; SEA-SURFACE TEMPERATURE; ATLANTIC-OCEAN; INTRASEASONAL VARIABILITY; HEAT-BUDGET; PACIFIC; GUINEA; GULF;

D O I：

10.1002/asl.287

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Zonal wind anomalies in the western equatorial Atlantic during late boreal winter to early summer precondition boreal summer cold/warm events in the eastern equatorial Atlantic (EEA) that manifest in a strong interannual Atlantic cold tongue (ACT) variability. Local intraseasonal wind fluctuations, linked to the St. Helena anticyclone, contribute to the variability of cold tongue onset and strength, particularly during years with preconditioned shallow thermoclines. The impact of cold tongue sea surface temperature (SST) anomalies on the wind field in the Gulf of Guinea is assessed. It contributes to the northward migration of humidity and convection and possibly the West African monsoon (WAM) jump. Copyright (C) 2010 Royal Meteorological Society

引用

页码：24 / 30

页数：7

共 42 条

[1] Cross-equatorial structure and temporal modulation of intraseasonal variability at the surface of the Tropical Atlantic Ocean [J].