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Water-level oscillations in the Adriatic Sea as coherent self-oscillations inferred bv independent component analysis

机译:相干自振荡推论亚得里亚海的水位振荡独立分量分析

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摘要

We analyze tide gauge records at four stations of the ISPRA network located in the Adriatic Sea basin (Eastern Italy), namely, going from North to South: Trieste, Ancona, Ortona and Otranto. We use linear and nonlinear methods in the frequency and time domains, including spectral and Independent Component Analysis (ICA), inter-times occurrence, and phase space embedding dimension evaluation. We show that four tidal constituents can be extracted by ICA and interpreted as coherent self-sustained oscillations. Finally, we show that these constituents can be reproduced by adopting a simple nonlinear oscillatory model that generalizes classical Andronov oscillator with the inclusion of a time dependent pumping.
机译:我们分析了位于亚得里亚海盆地(意大利东部)的ISPRA网络的四个站点的潮汐仪记录,即从北到南:的里雅斯特,安科纳,奥托纳和奥特朗托。我们在频域和时域中使用线性和非线性方法,包括频谱和独立分量分析(ICA),时间间隔内发生以及相空间嵌入维数评估。我们表明,ICA可以提取四个潮汐成分,并将其解释为相干的自持振荡。最后,我们表明可以通过采用简单的非线性振荡模型来再现这些成分,该模型将经典的Andronov振荡器归纳为时间依赖的泵浦。

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  • 来源
    《Progress in Oceanography》 |2011年第4期|p.447-460|共14页
  • 作者单位

    Dipartimento di lngegneria Industrial, Universiti degli Studi di Salerno, via Ponte Don Melillo, 84084 Fisciano (SA), Italy;

    Dipartimento di lngegneria Industrial, Universiti degli Studi di Salerno, via Ponte Don Melillo, 84084 Fisciano (SA), Italy;

    Dipartimento di lngegneria Industrial, Universiti degli Studi di Salerno, via Ponte Don Melillo, 84084 Fisciano (SA), Italy;

    Dipartimento di lngegneria Industrial, Universiti degli Studi di Salerno, via Ponte Don Melillo, 84084 Fisciano (SA), Italy;

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