Ocean currents south of Africa from drifters
Ocean currents south of Africa from drifters
复制标题
来自非洲南部漂流者的洋流
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
J. Lutjeharms
中科院分区：
文献类型：
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作者：
Jonathan V. Durgadoo;I. Ansorge;J. Lutjeharms
已知非洲南部的洋流及其变异性在空间上和可能在时间上覆盖范围很广。在这片广阔的海洋区域进行水文观测，后勤要求高，费用昂贵。近年来，漂流浮标的普遍存在使人们能够推断出该区域的某些水流特征，否则很难推断出这些特征。利用1988年至2005年收集的15 m深度的卫星跟踪漂流物观测资料，推断了30 ° S至60°S之间南大洋非洲部分的平均表面环流和表面流动能分布。加强流动和涡动动能水平较高的地区被确定，并同意与遥感产品建立的那些相当不错。这些结果证实了这些观测的价值，并表明随着漂流者轨迹数量的增加，这一数据集的用处越来越大。
The ocean currents and their variability south of Africa are known to cover a wide spectrum, spatially and possibly temporally. Hydrographic observations in this vast ocean region are logistically demanding and expensive. In recent years the prevalence of drifting buoys has allowed one to infer certain current characteristics for the region that otherwise would be difficult. Observations from satellite-tracked drifters drogued at a depth of 15 m, collected between 1988 and 2005, were used to infer the mean surface circulation and kinetic energy distributions of the surface flow in the African sector of the Southern Ocean between 30 and 60°S. Regions of intensified flow and of higher levels of eddy kinetic energy were identified and agree fairly well with those established from remote sensing products. These results confirm the value of these observations and indicate the increasing usefulness of this data set as the number of drifter tracks increases.