Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL072789 |
Dynamics of a "low-enrichment high-retention" upwelling center over the southern Senegal shelf | |
Ndoye, Siny1,2; Capet, Xavier2; Estrade, Philippe1; Sow, Bamol3; Machu, Eric1,4; Brochier, Timothee5; Doering, Julian6; Brehmer, Patrice7,8 | |
2017-05-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:10 |
文章类型 | Article |
语种 | 英语 |
国家 | Senegal; France; Germany |
英文摘要 | Senegal is the southern tip of the Canary upwelling system. Its coastal ocean hosts an upwelling center which shapes sea surface temperatures between latitudes 12 degrees and 15 degrees N. Near this latter latitude, the Cape Verde headland and a sudden change in shelf cross-shore profile are major sources of heterogeneity in the southern Senegal upwelling sector (SSUS). SSUS dynamics is investigated by means of Regional Ocean Modeling System simulations. Configuration realism and resolution (triangle x approximate to 2 km) are sufficient to reproduce the SSUS frontal system. Our main focus is on the 3-D upwelling circulation which turns out to be profoundly different from 2-D theory: cold water injection onto the shelf and upwelling are strongly concentrated within a few tens of kilometers south of Cape Verde and largely arise from flow divergence in the alongshore direction; a significant fraction of the upwelled waters are retained nearshore over long distances while travelling southward under the influence of northerly winds. Another source of complexity, regional-scale alongshore pressure gradients, also contributes to the overall retention of upwelled waters over the shelf. Varying the degree of realism of atmospheric and oceanic forcings does not appreciably change these conclusions. This study sheds light on the dynamics and circulation underlying the recurrent sea surface temperature pattern observed during the upwelling season and offers new perspectives on the connections between the SSUS physical environment and its ecosystems. It also casts doubt on the validity of upwelling intensity estimations based on simple Ekman upwelling indices at such local scales. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404131900078 |
WOS关键词 | WIND-DRIVEN ; WATERS ; SURFACE ; MODEL ; SST |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/25887 |
专题 | 气候变化 |
作者单位 | 1.Univ Dakar, LPAO SF, Dakar, Senegal; 2.Univ Paris Sorbonne, CNRS IRD UPMC MNHN, LOCEAN, Paris, France; 3.Ziguinchor Univ, LOSEC, Ziguinchor, Senegal; 4.Univ Brest, CNRS, IFREMER, Lab Oceanog Phys & Spatiale,IUEM,IRD, Brest, France; 5.IRD, UMMISCO, Bondy, France; 6.Leibniz Ctr Trop Marine Ecol ZMT, Bremen, Germany; 7.CNRS UBO IRD Ifremer, LEMAR, Campus UCAD IRD Hann, Dakar, Senegal; 8.ISRA, Ctr Rech Ocog Dakar Thiaroye, Dakar, Senegal |
推荐引用方式 GB/T 7714 | Ndoye, Siny,Capet, Xavier,Estrade, Philippe,et al. Dynamics of a "low-enrichment high-retention" upwelling center over the southern Senegal shelf[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(10). |
APA | Ndoye, Siny.,Capet, Xavier.,Estrade, Philippe.,Sow, Bamol.,Machu, Eric.,...&Brehmer, Patrice.(2017).Dynamics of a "low-enrichment high-retention" upwelling center over the southern Senegal shelf.GEOPHYSICAL RESEARCH LETTERS,44(10). |
MLA | Ndoye, Siny,et al."Dynamics of a "low-enrichment high-retention" upwelling center over the southern Senegal shelf".GEOPHYSICAL RESEARCH LETTERS 44.10(2017). |
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