Descripción del proyecto
Nuevos datos sobre el ciclo del bario en el océano Antártico
El bario (Ba) es una herramienta para la evaluación de la remineralización del carbono orgánico en varias zonas de los océanos del mundo. Sin embargo, el ciclo del Ba y sus reservas en los océanos no están bien definidos. Las mediciones de la composición isotópica del Ba (138Ba) pueden proporcionar información significativa sobre estas fuentes y procesos. Es fundamental comprender sobre todo el efecto del océano Antártico en el ciclo del Ba. El equipo del proyecto BaSIS, que cuenta con el apoyo de las Acciones Marie Skłodowska-Curie, arrojará luz sobre el ciclo del Ba en esta importante región oceánica. Estudiará el 138Ba en el agua de mar y las partículas marinas desde el crucero SWINGS de GEOTRACES en el océano Antártico. Los hallazgos serán de interés para los investigadores que estudian la repercusión del ciclo global del carbono.
Objetivo
Barium (Ba) has been proven to be a particular useful tool to estimate organic carbon remineralization in various areas of the world’s ocean. To date, however, the Ba cycle and its budgets in the ocean are not well constrained. Indeed, in the ocean, sources of Ba from hydrothermal alteration and deep-sea sediments, but also the internal Ba cycle are hard to constrain with Ba concentrations alone. The use of Ba isotopic composition (138Ba) measurements can provide meaningful insights on these sources and processes. Specifically, different inputs and different biological processes influencing the Ba distribution in the ocean have distinct 138Ba. However, surveys of 138Ba, in seawater and particles in the Southern Ocean (SO) has never been made. It is particularly important to understand the impact of the SO on the Ba cycle, as any preformed Ba or other sources of Ba in the SO would have a large impact on its use as a remineralization tracer in the global ocean. BaSIS is thus a unique opportunity to enhance knowledge on the Ba cycling in this key oceanic region by studying 138Ba in seawater and marine particles from the GEOTRACES cruise SWINGS in the SO.
The fellow will spend the first two years at the Laboratoire de l’Envionnement Marin (LEMAR) under the supervision of Dr. Planquette. This fellowship will allow her to come back to Europe with the technical expertise she acquired outside of the EU in the past years. She will implement a new technic and will acquire a unique overview of the Ba cycle in the global Ocean. Research results will be of interest to worldwide researchers working on the study of the impact of the global carbon cycle, promoting European excellence and competitiveness in dedicated European and international carbon export projects.
Programa(s)
- HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA) Main Programme
Régimen de financiación
HORIZON-AG-UN - HORIZON Unit GrantCoordinador
75794 Paris
Francia