Cécile Guieu (born 1963) is a French marine biogeochemist whose research concerns the effects of external inputs from the atmosphere and fluvial sediment processes on marine biogeochemical cycles. She is a director of research for the French National Centre for Scientific Research (CNRS), affiliated with the Observatoire Oceanologique de Villefranche, a satellite campus of Sorbonne University.
Education and career Guieu is the daughter of two professors, in geology and in life and earth sciences. After a licenciate in earth sciences from the University of Science and Technology of Languedoc, part of Montpellier 2 University, in 1986, she continued her studies in hydrology and earth science at Pierre and Marie Curie University and the École normale supérieure (Paris). She received a master's degree in 1987, completed her Ph.D. in 1991, and received a habilitation at Pierre and Marie Curie University in 2000. Her doctoral dissertation, Apports atmospheriques a la mediterranee nord-occidentale, was directed by Jean-Marie Martin.
She was a postdoctoral researcher at CNRS from 1991 to 1992, at the University of Rhode Island in the United States from 1992 to 1993, and at Texas A&M University from 1993 to 1994. She took a permanent position at CNRS in 1994, initially with the Institute of Marine Geochemistry in Montrouge, near Paris. She moved to the Observatoire Oceanologique de Villefranche in 1998.
Recognition Guieu was the 2009 recipient of the Manley Bendall Prize of the Societé d'Océanographie de France. She was elected to Academia Europaea in 2017.
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