Évolution de l'onde semi-diurne M2 de la marée à Brest de 1846 à 2005 |
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| Authors: | Nicolas Pouvreau Belén Martin Miguez Bernard Simon Guy Wöppelmann |
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| Institution: | 1. Centre littoral de géophysique, université de la Rochelle, av. Michel-Crépeau, 17042 La Rochelle, France;2. Service hydrographique et océanographique de la Marine, 13, rue du Chatellier, BP 30316, 29603 Brest, France |
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| Abstract: | The work of searching, recovering and quality control of ancient sea-level measurements at Brest is presented. This work enables us to complete a study carried out by Cartwright in 1972, which showed a decrease in the tidal M2 semi-diurnal amplitude of 1% per century. After including these ancient data, as well as the last four decades of observations in the analysis, our results show an increase of the amplitude of M2 after 1960 and a decrease before 1880, suggesting a long-period oscillation rather than a steady secular trend. To cite this article: N. Pouvreau et al., C. R. Geoscience 338 (2006). |
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| Keywords: | Marée Marégraphes Variations du niveau marin Brest France Tides Tide gauges Sea-level variations Brest France |
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