Cycles, scaling and crossover phenomenon in length of the day (LOD) time series

Luciano Telesca

Physica A: Statistical Mechanics and its Applications, 2007, vol. 379, issue 2, 459-464

Abstract: The dynamics of the temporal fluctuations of the length of the day (LOD) time series from January 1, 1962 to November 2, 2006 were investigated. The power spectrum of the whole time series has revealed annual, semi-annual, decadal and daily oscillatory behaviors, correlated with oceanic–atmospheric processes and interactions. The scaling behavior was analyzed by using the detrended fluctuation analysis (DFA), which has revealed two different scaling regimes, separated by a crossover timescale at approximately 23 days. Flicker-noise process can describe the dynamics of the LOD time regime involving intermediate and long timescales, while Brownian dynamics characterizes the LOD time series for small timescales.

Keywords: LOD; Detrended fluctuation analysis; Power spectrum; Scaling (search for similar items in EconPapers)
Date: 2007
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Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:379:y:2007:i:2:p:459-464

DOI: 10.1016/j.physa.2007.02.064

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