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Effect of hydrodynamic properties of the sea bottom on the tidal dynamics in a rectangular basin

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Abstract

Expressions derived for the friction coefficient in an oscillatory rotating turbulent bottom boundary layer (BBL) over rough, incompletely rough (smoothly rough), and smooth underlying surfaces are incorporated as an individual module into a two-dimensional nonlinear tidal model, and the standard version of the model and its modified analogue are used to discuss the titular subject. It is established that the dynamics of tides in the Taylor basin can change noticeably under the effect of hydrodynamic properties of the sea bottom. Such changes occur mainly in the influence domains of amphidromies. In the remaining parts of the basin, relative changes in the amplitudes and phases of tidal sea-surface level elevations do not exceed ±10% and ±10°, respectively. The largest discrepancies of tidal characteristics take place in the cases of the incompletely rough and smooth sea bottoms; the smallest discrepancies, in the case of the rough sea bottom. Estimates for the changes in tidal characteristics that are caused by the usually neglected effects of rotation and phase difference between the bottom friction and the tidal velocity at the upper BBL boundary are presented as well.

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Original Russian Text © B.A. Kagan, D.A. Romanenkov, 2006, published in Izvestiya AN. Fizika Atmosfery i Okeana, 2006, Vol. 42, No. 6, pp. 843–851.

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Kagan, B.A., Romanenkov, D.A. Effect of hydrodynamic properties of the sea bottom on the tidal dynamics in a rectangular basin. Izv. Atmos. Ocean. Phys. 42, 777–784 (2006). https://doi.org/10.1134/S0001433806060120

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  • DOI: https://doi.org/10.1134/S0001433806060120

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