GSTDTAP  > 气候变化
DOI10.1002/joc.5422
Do SST gradients drive the monthly climatological surface wind convergence over the tropical Atlantic?
Diakhate, Moussa1,2; Lazar, Alban2; de Coetlogon, Gaelle3; Gaye, Amadou T.1
2018-04-01
发表期刊INTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN0899-8418
EISSN1097-0088
出版年2018
卷号38页码:E955-E965
文章类型Article
语种英语
国家Senegal; France
英文摘要

This article presents a climatological study of the tropical Atlantic surface wind convergence, one of the main drivers of the marine intertropical convergence zone (ITCZ) precipitations, including coastal northeastern Brazilian and West African rainfalls. Climatological monthly mean surface wind convergence budget, as well as that of their month-to-month variations, is analysed over the 2000-2009 decade, using ocean-atmosphere reanalyses and satellite-derived data sets. Sea surface temperature (SST) influence is particularly investigated via comparison of its Laplacian with that of sea level pressure. Results for monthly means reveal that the Lindzen-Nigam paradigm does hold in regions of deep convection but only on their flanks. In deep convection regions, the budget analysis suggests the entrainment due to elevated heating by cumulus convection as the leading term. Elsewhere, over the open ocean ITCZ' meridional flanks, as well as over the coastal one' (Gulf of Guinea and northeastern Brazilian coasts), the pressure contribution is positive and largely dominated by its component below the boundary layer closely related to the SST. Horizontal advection is also found important over these areas, but with the pressure as the first-order driver. Otherwise, month-to-month variations of ITCZ are controlled by the geostrophy within the pressure contribution tightly dominated by the free tropospheric component.


英文关键词tropical Atlantic ITCZ surface convergence budget SST
领域气候变化
收录类别SCI-E
WOS记录号WOS:000431999600064
WOS关键词BOUNDARY-LAYER WINDS ; TEMPERATURE-GRADIENTS ; SIMULATIONS ; PACIFIC ; OCEANS ; VARIABILITY ; CIRCULATION ; CONVECTION ; DYNAMICS ; SYSTEM
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/36750
专题气候变化
作者单位1.Univ Cheikh Anta Diop, LPAO SF, Dakar 10700, Senegal;
2.Univ Paris 06, LOCEAN, Paris, France;
3.Univ Paris 06, Lab Atmosphere Milieux & Observat Spatiales LATMO, Paris, France
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GB/T 7714
Diakhate, Moussa,Lazar, Alban,de Coetlogon, Gaelle,et al. Do SST gradients drive the monthly climatological surface wind convergence over the tropical Atlantic?[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2018,38:E955-E965.
APA Diakhate, Moussa,Lazar, Alban,de Coetlogon, Gaelle,&Gaye, Amadou T..(2018).Do SST gradients drive the monthly climatological surface wind convergence over the tropical Atlantic?.INTERNATIONAL JOURNAL OF CLIMATOLOGY,38,E955-E965.
MLA Diakhate, Moussa,et al."Do SST gradients drive the monthly climatological surface wind convergence over the tropical Atlantic?".INTERNATIONAL JOURNAL OF CLIMATOLOGY 38(2018):E955-E965.
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