Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/22189
Title: Fractal analysis of deep ocean current speed time series
Authors: Cabrera Brito, Laura
Rodríguez Rodríguez, Germán 
García Weil, Luis 
Pacheco Martínez, Mercedes 
Pérez-Martell, Esther 
Waniek, J. J.
UNESCO Clasification: 251007 Oceanografía física
Keywords: North Atlantic Ocean
Currents
Ocean dynamics
Issue Date: 2017
Journal: Journal of Atmospheric and Oceanic Technology 
Abstract: Fractal properties of deep ocean current speed time series, measured at a single-point mooring on the Madeira Abyssal Plain at 1000- and 3000-m depth, are explored over the range between one week and 5 years, by using the detrended fluctuation analysis and multifractal detrended fluctuation analysis methodologies. The detrended fluctuation analysis reveals the existence of two subranges with different scaling behaviors. Long-range temporal correlations following a power law are found in the time-scale range between approximately 50 days and 5 years, while a Brownian motion–type behavior is observed for shorter time scales. The multifractal analysis approach underlines a multifractal structure whose intensity decreases with depth. The analysis of the shuffled and surrogate versions of the original time series shows that multifractality is mainly due to long-range correlations, although there is a weak nonlinear contribution at 1000-m depth, which is confirmed by the detrended fluctuation analysis of volatility time series.
URI: http://hdl.handle.net/10553/22189
ISSN: 0739-0572
DOI: 10.1175/JTECH-D-16-0098.1
Source: Journal of Atmospheric and Oceanic Technology [ISSN 0739-0572], v. 34 (4), p. 817-827
Rights: by-nc-nd
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