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Journal Articles Nonlinear Phenomena in Complex Systems Year : 2001

Time-Delay Study of Earth Orientation Parameters at Inter-Annual Time Scales

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Paul Manneville
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Abstract

We proceed to a reanalysis of time series of the Earth Orientation Parameters available from IERS [4] using Takens time-delay embedding technique [5]. Focusing on intermediate time scales rather than short ones as done in [3], we extract oscillations corresponding to Chandler wobble by singular-value decomposition [7] of the time-series of the Celestial Ephemeris Pole position (PMX,PMY) on the period 1890-2000. A Pi phase-shift of the oscillation around 1930 is pointed out explicitly. A similar study of the length-of-day time series shows strong correlation with indices measuring the strength of the ENSO phenomenon on the period 1962-1999 [23]. Differences between the dynamical systems approach and conventional signal analyses are emphasized.
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Dates and versions

hal-01025910 , version 1 (18-07-2014)

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  • HAL Id : hal-01025910 , version 1

Cite

Paul Manneville. Time-Delay Study of Earth Orientation Parameters at Inter-Annual Time Scales. Nonlinear Phenomena in Complex Systems, 2001, 4 (1), pp.94-105. ⟨hal-01025910⟩
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