Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-018-4582-8 |
Causes and evolution of the southeastern tropical Atlantic warm event in early 2016 | |
Luebbecke, Joke F.1,2; Brandt, Peter1,2; Dengler, Marcus1; Kopte, Robert1; Luedke, Jan1; Richter, Ingo3; Martins, Meike Sena4; Tchipalanga, Pedro C. M.5 | |
2019-07-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 53页码:261-274 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; Japan; Angola |
英文摘要 | A strong warm event occurred in the southeastern tropical Atlantic Ocean off Angola and Namibia in January and February 2016 with sea surface temperature anomalies reaching 3 degrees C. In contrast to classical Benguela Nino events, the analysis of various direct observations indicates that the warming was not predominantly forced by an equatorial Kelvin wave exciting a coastally trapped wave but instead resulted from a combination of local processes that are related to (1) a weakening of the alongshore, i.e. mainly southerly, winds and (2) enhanced freshwater input through local precipitation and river discharge. Consistent with the weakened winds, we find a reduction in latent heat loss from the ocean and a poleward surface current anomaly. The surface freshening, which is detected in satellite observations of sea surface salinity, caused a very shallow mixed layer and enhanced upper ocean stratification. This is supported by the analysis of the velocity structure of the Angola Current at 11 degrees S, which shows that at the time of the event subsurface velocities were directed northward while surface velocities were directed southward. The shallow layer of warm and fresh surface water was thus advected poleward by the surface current. In addition, a reduction of the local upwelling and the formation of a barrier layer that inhibits the entrainment of cool subsurface waters into the surface mixed layer might have contributed to the warm surface anomaly. The sudden termination of the warm event was accompanied by a re-intensification of southerly winds in March. |
英文关键词 | Tropical Atlantic Ocean Interannual variability Sea surface temperature anomalies Benguela Nino |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000471722400016 |
WOS关键词 | BENGUELA UPWELLING SYSTEM ; ANGOLA CURRENT ; OCEAN ; VARIABILITY ; CIRCULATION ; PACIFIC ; CONGO ; COAST ; WATER ; FLOW |
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/184371 |
专题 | 气候变化 |
作者单位 | 1.GEOMAR Helmholtz Ctr Ocean Res Kiel, Dusternbrooker Weg 20, D-24105 Kiel, Germany; 2.Christian Albrechts Univ Kiel, Kiel, Germany; 3.JAMSTEC, Applicat Lab, Yokohama, Kanagawa, Japan; 4.Univ Hamburg, Hamburg, Germany; 5.INIP, Mocamedes, Angola |
推荐引用方式 GB/T 7714 | Luebbecke, Joke F.,Brandt, Peter,Dengler, Marcus,et al. Causes and evolution of the southeastern tropical Atlantic warm event in early 2016[J]. CLIMATE DYNAMICS,2019,53:261-274. |
APA | Luebbecke, Joke F..,Brandt, Peter.,Dengler, Marcus.,Kopte, Robert.,Luedke, Jan.,...&Tchipalanga, Pedro C. M..(2019).Causes and evolution of the southeastern tropical Atlantic warm event in early 2016.CLIMATE DYNAMICS,53,261-274. |
MLA | Luebbecke, Joke F.,et al."Causes and evolution of the southeastern tropical Atlantic warm event in early 2016".CLIMATE DYNAMICS 53(2019):261-274. |
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