Simulations du climat du dernier maximum glaciaire a l'aide d'un modele de circulation generale de l'atmosphere incluant une modelisation du cycle des isotopes de l'eau et des poussieres d'origine desertique

Simulations of the last glacial maximum climate using an atmospheric general circulation model including a modeling of the water isotopes and desert dust cycles

• Auteur / Autrice : Sylvie Joussaume
• Direction : Robert Sadourny
• Type : Thèse de doctorat
• Discipline(s) : Terre, océan, espace
• Date : Soutenance en 1989
• Etablissement(s) : Paris 6

Résumé

Numerical simulations of the february and august climates of the last glacial maximum, 18000 years before present, have been performed with the atmospheric general circulation model of the laboratoire de meteorologie dynamique (cnrs). Such simulations allow to test the model capabilities to reproduce climatic conditions differing from the present day ones and to reconstruct the corresponding atmospheric circulation. Moreover, the atmospheric cycle of climatic tracers, the water isotopes and desert dust, have been introduced in the model in order to study the sensitivity of these cycles to climatic changes and in order to help the interpretation of paleoclimatic data