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Open AccessArticle

The Impact of Tides on the Bay of Biscay Dynamics

National and Kapodistrian University of Athens, Department of Physics, 15772 Athens, Greece
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J. Mar. Sci. Eng. 2020, 8(8), 617; https://doi.org/10.3390/jmse8080617
Received: 17 July 2020 / Revised: 7 August 2020 / Accepted: 13 August 2020 / Published: 17 August 2020
(This article belongs to the Special Issue Monitoring and Modelling of Coastal Environment)
The impact of tides on the Bay of Biscay dynamics is investigated by means of an ocean model twin-experiment, consisted of two simulations with and without tidal forcing. The study is based on a high-resolution (1/36) regional configuration of NEMO (Nucleus for European Modelling of the Ocean) performing one-year simulations. The results highlight the imprint of tides on the thermohaline properties and circulation patterns in three distinct dynamical areas in the model domain: the abyssal plain, the Armorican shelf and the English Channel. When tides are activated, the bottom stress is increased in the shelf areas by about two orders of magnitude with respect to the open ocean, subsequently enhancing vertical mixing and weakening stratification in the bottom boundary layer. The most prominent feature reproduced only when tides are modelled, is the Ushant front near the entrance of the English Channel. Tides appear also to constrain the freshwater transport of rivers from the continental shelf to the open ocean. The spectral analysis revealed that the tidal forcing contributes to the SSH variance at high frequencies near the semidiurnal band and to the open ocean mesoscale and small-scale features in the presence of summer stratification pattern. View Full-Text
Keywords: ocean modelling; tides; vertical mixing; energy spectra; NEMO; bay of biscay ocean modelling; tides; vertical mixing; energy spectra; NEMO; bay of biscay
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MDPI and ACS Style

Karagiorgos, J.; Vervatis, V.; Sofianos, S. The Impact of Tides on the Bay of Biscay Dynamics. J. Mar. Sci. Eng. 2020, 8, 617. https://doi.org/10.3390/jmse8080617

AMA Style

Karagiorgos J, Vervatis V, Sofianos S. The Impact of Tides on the Bay of Biscay Dynamics. Journal of Marine Science and Engineering. 2020; 8(8):617. https://doi.org/10.3390/jmse8080617

Chicago/Turabian Style

Karagiorgos, John; Vervatis, Vassilios; Sofianos, Sarantis. 2020. "The Impact of Tides on the Bay of Biscay Dynamics" J. Mar. Sci. Eng. 8, no. 8: 617. https://doi.org/10.3390/jmse8080617

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