The Alderney Race: general hydrodynamic and particular features
| Autor: | Lucille Furgerot, Anne-Claire Bennis, Franck Dumas, Yann Méar, C Voiseux, Mehdi Morillon, Emmanuel Poizot, Pascal Bailly du Bois |
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| Přispěvatelé: | PSE-ENV/SRTE/LRC, Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Service Hydrographique et Océanographique de la Marine (SHOM), Ministère de la Défense, Laboratoire Universitaire des Sciences Appliquées de Cherbourg (LUSAC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), Morphodynamique Continentale et Côtière (M2C), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2020 |
| Předmět: |
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General Mathematics 0211 other engineering and technologies General Engineering General Physics and Astronomy 02 engineering and technology Articles 010501 environmental sciences 01 natural sciences current Current (stream) Race (biology) [SDU]Sciences of the Universe [physics] Alderney Race hydrodynamics tide La Hague Cape 14. Life underwater 021108 energy Geology Physics::Atmospheric and Oceanic Physics Research Articles 0105 earth and related environmental sciences Marine engineering |
| Zdroj: | Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Royal Society, The, 2020, 378 (2178), pp.20190492. ⟨10.1098/rsta.2019.0492⟩ Philosophical Transactions Of The Royal Society A-mathematical Physical And Engineering Sciences (1364-503X) (Royal Society), 2020-08, Vol. 378, N. 2178, P. 20190492 (22p.) |
| ISSN: | 1471-2962 1364-503X |
| Popis: | This study presents an overview of the main hydrodynamic features of the Alderney Race strait based on in situ measurements and two-dimensional hydrodynamic model simulations. The strait encompasses a large amplitude of tidal properties (tidal range and tidal wave propagation) and particularly strong currents exceeding 5 m s −1 with associated counter currents and gyres. Variations in depth, sea bottom roughness, coastal topography and current orientation around the La Hague Cape provide access to a large variety of original hydrodynamic regimes. Some are revealed as locations with a 0.4 m drop in the mean sea level associated with strong average currents. A resonance effect associated with the offshore currents can also be observed close to the coasts. The ‘St Martin whistle’ occurs in a bay whose gyre centre oscillates with a reversal of the measured current every 5–7 min. The Alderney Race represents a particular area of interest for coastal hydrodynamic studies. The available in situ measurement datasets are rich with recordings of: sea levels; acoustic Doppler current profiler current profiles; surface radar currents; waves; dye experiments; surface and in-depth dissolved tracer surveys. Combined with hydrodynamic models, the complexity of this area can be further understood and knowledge of the hydrodynamic process and forcing parameters can be refined, which can be applied to other coastal areas. This article is part of the theme issue ‘New insights on tidal dynamics and tidal energy harvesting in the Alderney Race’. |
| Databáze: | OpenAIRE |
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