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Attenuated wave-induced drift in a viscous rotating ocean

Published online by Cambridge University Press:  20 April 2006

Jan Erik Weber
Jan Erik Weber
Affiliation:
Institute of Geophysics, University of Oslo, P.O. Box 1022, Blindern. Oslo 3, Norway
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Abstract

Mean drift currents due to spatially periodic surface waves in a viscous rotating fluid are investigated theoretically. The analysis is based on the Lagrangian description of motion. The fluid is homogeneous, the depth is infinite, and there is no continuous energy input at the surface. Owing to viscosity the wave field and the associated mass transport will attenuate in time. For the non-rotating case the present approach yields the time-decaying Stokes drift in a slightly viscous ocean. The analysis shows that the drift velocities are finite everywhere. In a rotating fluid it is found that the effect of viscosity implies a non-zero net mass transport associated with the waves, as opposed to the result of no net transport obtained from inviscid theory (Ursell 1950).

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 137 , December 1983 , pp. 115 - 129
Copyright
© 1983 Cambridge University Press

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