Seasonal Modes of Surface Cooling in the Gulf of Guinea
Seasonal Modes of Surface Cooling in the Gulf of Guinea
复制标题
几内亚湾表面冷却的季节性模式
DOI：
10.1175/jpo-d-11-031.1
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发表时间：
2011
影响因子：
3.5
通讯作者：
J. Sheinbaum
中科院分区：
文献类型：
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作者：
J. Jouanno;F. Marin;Y. Penhoat;J. Molines;J. Sheinbaum
热带大西洋的数值模拟表明，在几内亚湾的上升流区的表面冷却主要是由于垂直混合。在季节尺度上，南赤道流（SEC）的北方和南方分支以及几内亚流的空间结构和时间变化与几内亚湾湍流热通量的时间和分布相关。通过调节次表层的速度切变，这些表层水流控制着垂直湍流交换，将冰冷而富含营养的沃茨带到表层。这一机制解释的季节性和空间分布的表面叶绿素浓度比普遍接受的假设，温跃层运动控制的营养通量。南SEC的位置解释了为什么冷舌和高叶绿素浓度从赤道延伸到盆地东南部的4°S。
A numerical simulation of the tropical Atlantic Ocean indicates that surface cooling in upwelling zones of the Gulf of Guinea is mostly due to vertical mixing. At the seasonal scale, the spatial structure and the time variability of the northern and southern branches of the South Equatorial Current (SEC), and of the Guinea Current, are correlated with the timing and distribution of turbulent heat fluxes in the Gulf of Guinea. Through modulation of the velocity shear at the subsurface, these surface currents control the vertical turbulent exchanges, bringing cold and nutrient-rich waters to the surface. This mechanism explains the seasonality and spatial distribution of surface chlorophyll concentrations better than the generally accepted hypothesis that thermocline movements control the nutrient flux. The position of the southern SEC explains why the cold tongue and high chlorophyll concentrations extend from the equator to 4°S in the southeastern part of the basin.
根据氦同位素不平衡推断赤道大西洋的上升流和相关热通量
影响因子：
--
作者：
M. Dengler;J. Sültenfuß;R. Hummels;S. Hüttl-Kabus;B. Bourles
通讯作者：
B. Bourles