Marine geochemistry. Ocean circulation, carbon cycle and climate change.

Matthieu Roy-Barman received his Doctorate in Fundamental Geochemistry in 1993 at the Institut de Physique du Globe in Paris, France. After 2 years of post-doc at the California Institute of Technology, USA, he joined the oceanography laboratory of Toulouse University (LEGOS), France, in 1995 as an assistant professor. In 2002, he moved to the "Laboratoire des Sciences du Climat et de l'Environnement" and the Versailles University, France, where he is professor since 2005. His research fields the role of marine particles in the ocean biogeochemical cycles and the fate of contaminant in the urban environment together with methodological developments for the analysis of natural radioactive isotopes.

Catherine Jeandel obtained a PhD in marine geochemistry at Paris VII University, France, and later a research position at CNRS. She moved in 1985 to the University of Toulouse, France, where she is working in the "Toulouse Isotopie Marine" research group of the Laboratoire d'Etudes en Geophysique et Océanographie Spatiale (LEGOS). Her research is focused on quantifying the fluxes and processes that govern the chemical state of the ocean. She stands among the pioneers in developing trace element and their isotope analyses for seawater and marine particles. With other marine geochemists, she advocates multi-tracer approaches to resolve oceanic processes, yielding the ongoing international GEOTRACES program.