Impulse exchange at the surface of the ocean and the fractal dimension of drifter trajectories.

Summers, David (2002) Impulse exchange at the surface of the ocean and the fractal dimension of drifter trajectories. Nonlinear Processes in Geophysics, 9. pp. 11-23. ISSN 1023-5809

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An impulse-based model is developed to represent a coupling between turbulent flow in the atmosphere and turbulent flow in the ocean. In particular, it is argued that the atmosphere flowing horizontally over the ocean surface generates a velocity fluctuation field in the latter's near-surface flow. The mechanism for this can be understood kinematically in terms of an exchange of tangentially-oriented fluid impulse at the air-sea interface. We represent this exchange numerically through the creation of Lagrangian elements of impulse density. An indication of the efficacy of such a model would lie in its ability to predict the observed fractal dimension of lateral trajectories of submerged floats set adrift in the ocean. To this end, we examine the geometry of lateral tracer-paths determined from the present model.

Item Type: Article
Print ISSN: 1023-5809
Additional Information: 11-23
Uncontrolled Keywords: Atmospheric turbulence; Oceanic turbulence; Interaction models; Fluid impulse; Air-sea interface; Fractal movement paths; Prediction; Lagrangian elements; Impulse density; Floater movement models;
University Divisions/Research Centres: Faculty of Engineering, Computing and Creative Industries > School of Engineering and the Built Environment
Dewey Decimal Subjects: 600 Technology > 620 Engineering > 627 Hydraulic engineering
500 Science > 530 Physics
500 Science > 510 Mathematics > 510 Mathematics
Library of Congress Subjects: T Technology > TC Hydraulic engineering. Ocean engineering
Q Science > QA Mathematics
Q Science > QC Physics
Item ID: 1862
Depositing User: RAE Import
Date Deposited: 16 May 2008 08:45
Last Modified: 20 Aug 2013 10:03

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