Jacques Fontan was a Professor at the Université Paul Sabatier in Toulouse. He created the Laboratoire d'Aérologie (associated with the CNRS) of which he was the director from 1982 to 1986. His research has focused on the dynamics and physico-chemistry of the lower atmosphere, with a particular focus on pollution problems. They have resulted in more than a hundred publications. He was one of the pioneers of research in this field in France and in the intertropical regions.