Journal
SIAM JOURNAL ON APPLIED MATHEMATICS
Volume 62, Issue 3, Pages 777-800Publisher
SIAM PUBLICATIONS
DOI: 10.1137/S0036139999366401
Keywords
Lyapunov exponent; stochastic flow; Lagrangian motion; predictability; oceanographic applications
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A stochastic model is proposed for multiparticle Lagrangian motion in the upper ocean. The model is based on hydrodynamics equations with random forcing, includes a few well interpreted and well estimated parameters, and implies a common description of the one-particle motion via a Langevin equation for the particle velocity. The dependence of the top Lyapunov exponent on the model parameters is studied as a part of a Lagrangian predictability problem. In particular, it is found that the Coriolis effect can radically improve the prediction of a Lagrangian particle position based on observations of other particles.
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