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首页> 外文期刊>Geophysical Research Letters >Large change of mesoscale variability in the Kuroshio extension region during the first 5 years of the TOPEX/Poseidon mission
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Large change of mesoscale variability in the Kuroshio extension region during the first 5 years of the TOPEX/Poseidon mission

机译:在TOPEX / Poseidon任务的前5年中,黑潮延伸区中尺度变率发生了较大变化

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摘要

Analysis of the first 5 years of TOPEX/Poseidon altimetry data reveals that mesoscale variability (MV) in the Kuroshio Extension region has a large, well structured temporal change. The mesoscale variance varies by more than a factor of 2 over the 5-year span. The temporal variation appears to be the combination of two forms: a large-scale standing (from 140°E to 170°E) modulation, and accompanying with it a variation that propagates westward slowly with a phase speed of about 0.7 cm/s. Along with the westward propagation, the center of maximum MV retreats westward. As a comparison, variation of MV in the Gulf Stream region is computed. The analysis shows that MV in the Gulf Stream region also undergoes large temporal change. But it is much less well structured.
机译:对TOPEX /波塞冬测高仪数据的前五年进行的分析表明,黑潮扩展地区的中尺度变化(MV)具有较大的结构良好的时间变化。在5年中,中尺度差异变化超过2倍。时间变化似乎是两种形式的组合:大规模站立(从140°E到170°E)调制,并伴随着一个以大约0.7 cm / s的相速度缓慢向西传播的变化。随着向西传播,最大MV的中心向西撤退。作为比较,计算了墨西哥湾流地区的MV变化。分析表明,墨西哥湾流地区的MV也经历了较大的时间变化。但是它的结构要差得多。

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