Surface circulation and fronts of the South Pacific Ocean, east of 120°W
Surface circulation and fronts of the South Pacific Ocean, east of 120°W
复制标题
西经 120° 以东的南太平洋表面环流和锋面
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
O. Pizarro
中科院分区：
文献类型：
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作者：
A. Chaigneau;O. Pizarro
使用 1979 年至 2004 年卫星跟踪的漂流器对西经 120°以东的南太平洋表面环流进行了研究。描述了该地区的主要洋流，如南极绕极洋流、南太平洋洋流、智利-秘鲁洋流和合恩角洋流。我们认为存在一个分支，从西经 100-120° 之间的 ACC 流出，并将亚南极地表水输送到低纬度地区。我们还表明在 35°S 以北存在反气旋再循环单元。最后，根据水文剖面，我们表明，在南太平洋东部，副热带锋的核心对应于150 m深度的14°C等温线和相对于3000 m的2.7 m动态高度。亚南极锋位于 100-400 m 深度处，最大温度梯度在 3-8°C 范围内。
The South Pacific surface circulation east of 120°W is studied, using satellite tracked drifters from 1979–2004. The major currents of this region are described such as the Antarctic Circumpolar, the South Pacific, the Chile‐Peru and the Cape Horn Currents. We suggest the presence of a branch, exiting from the ACC between 100–120°W, and transporting subantarctic surface water toward lower latitudes. We also show the existence of an anticyclonic recirculation cell north of 35°S. Finally, based on hydrographic sections, we show that in the eastern South Pacific the core of the Subtropical front corresponds to the 14°C isotherm at 150 m depths and to the 2.7 m of dynamic height relative to 3000 m. The Subantarctic front is located by maximum temperature gradients in the range 3–8°C at 100–400 m depth.