ROV3G 2021 database: geophysical data on the continental shelf offshore Santo Stefano al Mare and San Lorenzo al mare, Liguria, Italy.
|Author(s)||Leclerc Frédérique1, Soubigou Olivier2, Dano Alexandre1, Corradi Nicola3, Clodic Guillaume2, Larroque Christophe1, Migeon Sébastien4, Morelli Danilo3, Ratzov Gueorgui1, Azzoug Cherifa1, Boughanemi Alexandre1, Bramardi Gilerik1, Gouet Maxime1, Llorens Florian1, Palagonia Sylvain1, Papin Loïs1|
|Affiliation(s)||1 : Université Côte d'Azur, Observatoire de la Côte d'Azur, IRD, CNRS, Géoazur, Sophia Antipolis, France
2 : Institut Français de Recherche pour l’Exploitation de la Mer, Direction de la Flotte, Unité de recherche Navires et Systèmes Embarqués, Ifremer Brest, ZI Pointe du Diable, 29280 Plouzané, France
3 : DISTAV, Department of Earth, Environment and Life Sciences, University of Genoa, Genoa, Italy; GNRAC, National Research Group for Coastal Environment, Genoa, Italy
4 : Sorbonne Université, France, CNRS, Observatoire de la Côte d'Azur, IRD, Géoazur, 250 rue Albert Einstein, Sophia Antipolis 06560 Valbonne, France.
|Note||Bathymetric grids were not calculated for navigation purposes|
|Keyword(s)||Ligurian shelf, Bathymetry, Back-scatter, Continental shelf|
ROV3G scientific cruise is dedicated to the morpho-tectonic study of the ligurian shelf, through the acquisition of bathymetric data and optical images with HROV Ariane. This cruise took place on R/V Europe in october 2021, and constituted a pedagogic project for the students of Master 3G Recherche, Géologie et Géophysique, of Université Côte d'Azur (UCA), attached to Géoazur lab. The M2 students were in charge of the scientific project, they determined the goals of the cruise, took part in the acquisition and interpretation of the data.
During the 3 days cruise, we acquired bathymetric data at shallow depth on the continental shelf offshore Santo Stefano al Mare and San Lorenzo al Mare, along the Ligurian coast. The bathymetry on the continental shelf exhibits morphologies that are probably related to the Flyschs formation that is outcroping onshore (Stani et al., 2010), and that is partially capped by late quaternary deposits (as identified in seismic data and interpreted in Bozzano et al., 2006). Ridges identified as paleo-shorelines (paleo-beaches?) have been investigated with HROV ariane whose navigation is also published here. Videos are available on video.ifremer.fr
Here we publish two bathymetric grids at high-resolution, calculated from the ME70 multibeam echosounder of R/V Europe, using GLOBE software (Poncelet et al., 2022). The shallowest part of the plateau is gridded in a 5 m digital elevation model (DEM), while the entire survey area is gridded at 10m resolution. The back-scatter maps, gridded at 6 m, produced with Sonarscope software (Augustin et al., 2022), are also available (raw and compensated). All grids are in WGS84 (EPSG:4326).
The cruise report (written in french) is also available.
ME70 multibeam echosounder