TONGA is a international multidisciplinary project dedicated to the study of the control of ocean productivity and carbon export driven by micronutrients from hydrothermal origin. It is based both on a 37-day oceanographic cruise in the Western Tropical South Pacific and modelling work and involves hydrothermal geochemists, physical oceanographers, trace element chemists (ocean and atmosphere), biogeochemists, biologists and modelers.

TONGA is a multidisciplinary project dedicated to the study of the control of ocean productivity and carbon export driven by micronutrients from hydrothermal origin. It is based both on a 37-day oceanographic cruise in the Western Tropical South Pacific and modelling work and involves hydrothermal geochemists, physical oceanographers, trace element chemists (ocean and atmosphere), biogeochemists, biologists and modelers.

During the oceanographic cruise two THOË samplers were deployed on mooring lines to determine dissolved elements, including manganese and mercury. Samplers will remain in place for one year and each DGT will be exposed for a one-month period.  For further information on the project please  click on the link: (https://www.mio.osupytheas.fr/fr/mers-et-oceans-changement-global/tonga-productivite-oceanique-et-exportation-du-carbone)