Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/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
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ISSN | 0899-8418 |
EISSN | 1097-0088 |
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 |
推荐引用方式 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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