HR: 0800h
AN: OS41D-0500    [Abstracts]
TI: An Influence Of Boundary on Chaotic Advection In a Vortex Flow
AU: * Stepanov, D
AF: Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of Sciences, Baltiyskaya ul. 43, Vladivostok, 690041 Russian Federation
AB: The investigation of transport features of ocean vortex flows is a very important problem of geophysical hydrodynamics. Chaotic advection (Hasan Aref,1999) has fundamental importance in studies of mixing ocean waters. The influence lateral boundary on entrainment and release of water by ocean eddy structure is investigated with using mechanism of chaotic advection. In represented work, the topographical eddy situated into barotropic background flow is considered. The flow passes along lateral boundary. If the velocity of background flow is stationary, the exchange fluid particles between vortex region and flowing region is absence. When background flow has perturbation, for example tide-generating force, there is transport of passive pollutant between background flow and vortex region. The different scenarios of the influence of boundary on intensification of transport features in system were founded. It was showed, that presence of lateral boundary leads to increase exchange up to 1,5 time. New type behavior of trajectories of passive pollutant was founded, with using numerical methods. It is presented, by the example of transport of the fish eggs and larvae from the southern Japan spawning ground to the food abundant Kuroshio-Oyashio transition zone, oceanological interpretation of considered model of chaotic advection.
DE: 4255 Numerical modeling
SC: Ocean Sciences [OS]
MN: 2004 AGU Fall Meeting