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Since Sept. 2002, she is a CNRS researcher (Directeur de Recherche) in the Montpellier Laboratory of Computer Science, Robotic and Microelectronics (LIRMM), where she is the leader of the computer arithmetic group (ARITH). From 88 to 93, V. Berthé was a student of Ecole Normale Supérieure (Ulm), Paris. She earned the Agrégation in Mathematics in 92, the Ph.D ('94) in pure mathematics from the University of Bordeaux, and Habilitation (HDR) ('99) from the University Aix-Marseille II, both under the direction of J.-P. Allouche. From Oct. 93 to Sep. 02, V. Berthé was a CNRS researcher (CR2, 01) at IML (Institut de Mathématiques de Luminy), Marseille, where she became CR1 researcher in 97. She became DR2 researcher in 2006, and acts from 2007 as scientific officer at CNRS in charge of the relations between computer science and mathematics. V. Berthé's research interests lie at the interface between mathematics and computer science, and more precisely, in symbolic dynamical systems, word combinatorics and arithmetics with special focus on discrete geometry and numeration systems.
Born 1938 in Sønderborg, Denmark, he received a Mag.scient. in 1963 from University of Aarhus. He obtained a Ph.D. in 1967 from the University of Chicago, where his thesis advisor was F-W. Lawvere. He spent most of his career as Lecturer at University of Aarhus from 1970, where he is currently Emeritus from 2005.
Most of his research is in category theory, and major contributions concern what is known as Synthetic Differential Geometry.
Chief Research Scientist
Data Assimilation and Satellite Meteorology Division
Meteorological Service of Canada
From 1991 to 2007, Dr. Gauthier has been a research scientist at Environment Canada (EC) where he worked on the development of variational data assimilation, the 3D-Var, which was implemented in the operational suite in June 1997. He then supervised a team of research scientists, meteorologists, and computer scientists to work on a research and development program that led to the operational implementation of 4D-Var in March 2005. In 2003, Dr. Gauthier became head of the Data Asssimilation and Satellite Meteorology Research section of Environment Canada. In November 2000, he became adjunct professor in the Department of Earth and Atmospheric Sciences at UQAM. In October 2007, he joined the department as associate professor.
His research interests are related to the methodology and applications of data assimilation and its relationship with atmospheric dynamics and predictability. More recently, he became interested in data assimilation with coupled atmospheric-chemistry models in the framework of a study funded by the European Space Agency. Assimilation with a coupled atmosphere-ocean model is also a new project that is carried out within the newly formed research network on Prediction and Predictability of the Global Atmosphere-Ocean System from Days to Decades funded by the Canadian foundation on Climate and Atmospheric Sciences (CFCAS). Dr. Gauthier is involved in the THORPEX World Weather Research Programme, which is concerned with high impact weather forecasting over a period of 0 to 14 days. He is currently co-chairing the THORPEX working group on data assimilation and observing strategies. He was one of the organizers of the First THORPEX International Science Symposium (Montréal, 2004).