The theme of the global warming has recently promoted the climate among problems major to which the society is confronted. Beyond the discount in cause of a winning vulgate, it concerns to lead a reflection on the elaboration of knowledge and the role of the " scientist ". Needs of the battle against the "anthropic drift of the climate " have behaved to the affirmation of a geoscience whose pretensions have no equal that uncertainties. It is neccessary to register the facts in a problematics really rigorous.Le thème du réchauffement a récemment promu le climat parmi les problèmes majeurs auxquels la société est confrontée. Au-delà de la remise en cause d'une vulgate conquérante, il s 'agit de mener une réflexion sur l'élaboration des connai...