Publications scientifiques

Brest and Marseille tide gauges time series between 1885 and 2022 data gaps are filled with data from neighboring tide gauges thanks to a combination model that does not alter original trends. Continuous relative sea level time series obtained from this step are then corrected from the inverse barometer effect and/or periodic components. Time series are systematically explored to form all possible sub-time series, from 20 years length to the full time span, and adjusted with linear and quadratic fits.

A FEM model of Shallow Wave Equations (SWE-FEM) is studied, taking into account the variable bathymetry of semi-enclosed sea basins. The model, with a spatially varying Coriolis term, is implemented for the description of combined refraction–diffraction effects, from which the eigenperiods and eigenmodes of extended geographical sea areas are calculated by means of a low-order FEM scheme. The model is applied to the western Mediterranean basin, illustrating its versatility to easily include the effects of geographical characteristics like islands and other coastal features.

Intertidal marshes are important habitats for nekton. However, historical draining and dyking hampered European coastal wetlands. Marsh restoration is therefore critical not only to improve their capacity to protect coastal lines but also to rehabilitate their ecological functionalities. The benefits of intertidal marsh restoration for nekton community composition and feeding ecology are examined in a case study within the largest macrotidal estuary in Western Europe (Gironde).

The Regions Of Freshwater Influence (ROFIs) are defined as the area on the continental shelf in the vicinity of estuaries, where freshwater from the river significantly influence water properties and circulation. These regions are subject to a variety of dynamic forcings, including tides, winds and river runoffs, which exhibit considerable variability. The objective of this study is to identify the dominant time scales of variability of the three major ROFIs (Seine, Loire, and Gironde) of the French continental shelf and their evolution over the last two decades.

The COAST-HF_Marel-Iroise station is a scientific floating platform in the Ifremer in situ test site of Sainte Anne du Portzic equipped with various sensors to monitor the local metocean conditions (Trasch Martin, 2023). It provides a rich array of input data for field campaign on mooring line tension of this station, both with and without the presence of biofouling.

Le marégraphe de Marseille est à la fois le bâtiment et l'appareil d'observation du niveau de la mer qu'il abrite. Créé en 1885 pour déterminer le niveau moyen de la mer formant l'origine des altitudes continentales françaises, il observe le niveau de la mer depuis cette époque. Classé monument historique et désormais complété d'instruments géophysiques modernes, il forme un observatoire dédié à la géodésie et aux sciences du changement climatique.

The storm surge is the non-tidal component of coastal sea-level. It responds to the atmosphere both through the direct effect of atmospheric pressure on the sea-surface, and through Ekman transport induced by wind-stress. Tide gauges have been used to measure the sea-level in coastal cities for centuries, with many records dating back to the 19th-century or even further, at times when direct pressure observations were scarce.

In this study, alternatively to the megathrust, we identify upper-plate normal faults orthogonal to the trench as a possible tsunami source along the Lesser Antilles subduction zone. The Morne Piton fault system is such a trench-perpendicular upper crustal fault at the latitude of Guadeloupe.