HERMES 1

Type Oceanographic cruise
Ship Universitatis
Ship owner Consiglio Nazionale Delle Ricerche
Dates 12/10/2005 - 24/10/2005
Chief scientist(s) GAMBI Christiana

POLYTECHNIC UNIVERSITY OF MARCHE - LMBE

Piazza Roma, 22

60100 ANCONA

071 2202344

https://www.univpm.it/Entra/Engine/RAServePG.php
Objective A network of short mooring lines equipped with currentmeters and sequential sediment traps was deployed at the beginning of the cruise along the axis of two canyons and one open slope of the southwestern end of the Gulf of Lion. The objectives of this observational effort are (i) to monitor the near-bottom sediment dynamics across the entire slope, (ii) to monitor the biweekly variability of downward particulate fluxes, and (iii) to evidence the spatial coherence of suspended sediment transport between canyons and open slope environments. Distribution of water masses and turbid structures in the area were characterized along transects extending from the shelf edge to the rise. Near bottom water samples were collected for biogeochemical analyses (suspended sediment concentration, particulate organic and inorganic carbon, radioisotopes (C13, N15), sugars, and metals). The primary objective of the seabed sampling was to identify the across-slope variation of benthic communities and sediment characteristics within canyons and on the adjacent open slopes (which are used as control stations). Cores were sub-sampled for biological, sedimentological and chemical analysis. Biological analysis of the superficial sediment (0-50 cm) included biochemical composition of organic matter, bacteria production, enzymatic activities, bacteria diversity, meio- and macro-fauna diversities. Sedimentological analysis included for radioisotopic dating (Pb210), grain size analysis, porosity and specific surface. Chemical analysis included isotopic (H3, C12, C13, N15), organic (alkenones, alkanes, amino acids, particulate and dissolved organic carbon) and mineral (metals) characterization of sediment.

Published data

Augris Claude, Agin Gregory, Berne Serge, Arnaud Mireille, Guizien Katell, Chatelain Mathieu, Labrune Céline, Carbonnel Philippe, Maillet Grégoire, Grenz Christian, Vella Claude, Nittrouer Charles Chuck, Bourrin François, Certain Raphaël, Durrieu De Madron Xavier, Garlan Thierry, Dufois Francois, Jouet Gwenael, Dennielou Bernard, Simplet Laure (2013). Seabed substrate database from a compilation of sediment samples taken during oceanographic campaigns carried out in the Gulf of Lion by Ifremer, CEFREM, IRSN, CEREGE, FOB, MIO, LECOB, The Conseil Général de l'Hérault and Rhône-Méditerranée-Corse Water Agency. Results of grain size analysis performed on samples. https://doi.org/10.17882/81430


Data managed by SISMER