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• W2022777787 abstract "We analyse drifter data from the Northeast Atlantic and find that single-particle motion has fractal dimension D = 1.28 ± 0.08 at scales 5 to 100 km. The single particle trajectories are modeled using fractional Brownian motion. Integral time scale is therefore shown to be a function of both the time between position fixes and the length of the total period the drifter was tracked. The variance (particle dispersion) grows as approximately t3/2. The probability density function of single-particle velocity is observed to be leptokurtic, consistent with the fractional Brownian motion model. The present work reports two-particle trajectories with fractal dimension D = 1.3 for scales from 8 km to 150 km. The two-particle dispersion is modelled as accelerated fractional Brownian motion, in which speed becomes a function of time elapsed since the particles were very near to each other. The acceleration is chosen to be consistent with the patch variance growing as t2.34. The dependence of relative velocity between pairs of drifters separated by a distance l, is observed to scale as l0.3. This is consistent with the accelerated fractional Brownian motion model for two-particle motion." @default.
• W2022777787 created "2016-06-24" @default.
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• W2022777787 date "1991-01-01" @default.
• W2022777787 modified "2023-10-16" @default.
• W2022777787 title "The fractal dimension of drifter trajectories and estimates of horizontal eddy-diffusivity" @default.
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• W2022777787 doi "https://doi.org/10.3402/tellusa.v43i5.11956" @default.
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