Coastal Upwelling: Onshore–Offshore Circulation, Equatorward Coastal Jet and Poleward Undercurrent over a Continental Shelf-Slope
Coastal Upwelling: Onshore–Offshore Circulation, Equatorward Coastal Jet and Poleward Undercurrent over a Continental Shelf-Slope
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沿海上升流：陆架-近海环流、赤道沿岸急流和大陆架斜坡上的向极潜流
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发表时间：
1982
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影响因子：
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通讯作者：
N. Suginohara
中科院分区：
文献类型：
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作者：
N. Suginohara
摘要利用数值模式研究了与海岸上升流有关的近岸-近海环流、赤道向海岸急流和极向潜流。模式海洋具有沿长短方向均匀的陆棚坡度，并受风应力作用，沿岸范围有限。温跃层与陆坡相交，变形内半径小于陆坡宽度。这可能是沿海上升流地区的典型情况，如俄勒冈州和非洲西北部。作为对风的初始响应，诱导了Ekman离岸流和补偿的岸上流，并且在陆坡上发展了向赤道流。当第一模式的海岸捕获波从赤道边缘的强迫区到达时，岸上的补偿流离岸的沿海地区开始减弱，最终离岸流伴随着下降流占主导地位。因此，上升流往往局限于...
Abstract The onshore-offshore circulation, equatorward coastal jet and poleward undercurrent associated with coastal upwelling are studied with numerical models. The model ocean has a continental shelf-slope uniform in the longshort direction and is forced by the wind stress with a limited longshore extent. The thermocline intersects the shelf-slope and the internal radius of deformation is smaller than the width of the shelf-slope. This may be a typical situation for coastal upwelling regions such as those off Oregon and northwest Africa. As the initial response to the onset of the winds, the Ekman offshore flow and the compensating onshore flow are induced and the equatorward flow develops over the shelf-slope. When the first mode coastal-trapped wave from the equatorward edge of the forcing region arrives, the onshore compensating flow offshore of the coastal area begins to decrease in strength and eventually offshore flow accompanied by downwelling dominates. Thus, the upwelling tends to be confined t...