Marion is a marine biogeochemist with 25 years of research experience in marine biogeochemistry. She holds a PhD in Earth Sciences from the Free University of Brussels (1994) and the ‘Habilitation à Diriger des Recherches’ from Université Pierre et Marie Curie (2007). She leads the research group on "Modeling the Earth’s Response to Multiple Anthropogenic Interactions and Dynamics" at LSCE. Her research focuses on understanding and projecting changes in marine biogeochemical cycles and ecosystems in response to climate change and ocean acidification. Marion has been a lead scientist in large-scale EU projects focused on the marine carbon cycle (CarboOcean, CarboChange) and ocean acidification (EPOCA). She acts as an expert for marine biogeochemistry at Mercator Océan, the French national centre of operational oceanography. She also co-chairs of the GODAE OceanView task team on “Marine Ecosystem Analysis and Prediction (MEAP)”, where she actively promotes the dialogue between scientists and end-users.