Why Were Sea Surface Temperatures so Different in the Eastern Equatorial Atlantic in June 2005 and 2006
Why Were Sea Surface Temperatures so Different in the Eastern Equatorial Atlantic in June 2005 and 2006
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DOI：
10.1175/2008jpo4030.1
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发表时间：
2009-06
影响因子：
3.5
通讯作者：
F. Marin;G. Caniaux;B. Bourlès;H. Giordani;Y. Gouriou;E. Key
中科院分区：
文献类型：
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作者：
F. Marin;G. Caniaux;B. Bourlès;H. Giordani;Y. Gouriou;E. Key
翻译后摘要2005年6月和2006年6月在赤道东大西洋的海面温度的比较表现出很大的变化，在赤道冷舌的属性，远低于2006年的温度在2005年。发现这种差异主要是由于在两年之间的冷舌的发展的时间转移。2005年4月至5月，热带大西洋西部的东风比2006年4月至5月更强，这些风有利地预处理了大西洋东部的海洋次表层条件。然而，它也表明，一个比通常更强的东南贸易的季节内加强是负责在2005年5月中旬从20°W到非洲海岸和从6°S到赤道的广阔区域的海表温度的快速和早期强烈冷却。这一特殊事件强调了几内亚湾当地季节内风应力变化启动冷舌季节性变化的能力。
Abstract A comparison of June 2005 and June 2006 sea surface temperatures in the eastern equatorial Atlantic exhibits large variability in the properties of the equatorial cold tongue, with far colder temperatures in 2005 than in 2006. This difference is found to result mainly from a time shift in the development of the cold tongue between the two years. Easterlies were observed to be stronger in the western tropical Atlantic in April–May 2005 than in April–May 2006, and these winds favorably preconditioned oceanic subsurface conditions in the eastern Atlantic. However, it is also shown that a stronger than usual intraseasonal intensification of the southeastern trades was responsible for the rapid and early intense cooling of the sea surface temperatures in mid-May 2005 over a broad region extending from 20°W to the African coast and from 6°S to the equator. This particular event underscores the ability of local intraseasonal wind stress variability in the Gulf of Guinea to initiate the cold tongue seaso...