12.07.2024

Greenfjord project : FOREL's CTD rosette samples

During the GreenFjord mission, water samples are taken one after the other with the rosette at various stations in the Sermelik fjord, in order to realize geochemical but also Environmental DNA (eDNA) analysis.

FOREL's CTD rosette comes out of the water. In background Jérôme Chappellaz (Full Professor at EPFL and Director of research CNRS), Sébastien Lavanchy (engineer ETS/HES) and Erwan Le Gars (FOREL’s crew).

The oceanographic activities of the GreenFjord project are coordinated by Professor Samuel Jaccard of the University of Lausanne. The CTD (Conductivity Temperature Depth) is a physical oceanography instrument designed to measure water temperature, conductivity and pressure (depth). On the FOREL, the CTD is decoupled from the "rosette", so that water samples can be taken without metallic contamination. The water samples recovered using the rosette can be used to carry out additional measurements and analyses, such as trace metals and nutrients.

During the GreenFjord mission, water samples are taken one after the other with the rosette at various stations in the Sermelik fjord, in order to realize geochemical but also eDNA* analysis in collaboration with ETH Zurich.

*Environmental DNA (eDNA) is a non-invasive biodiversity monitoring technique for natural environments and species.

More about Greenfjord project : www.greenfjord-project.ch

photo : @julien.girardot.photography