The present IPSL organization leans on 4 scientific units, one Data Center, a unit that brings together observations services and national tools, and working groups. This organization will change by the end of year 2008, under the responsability of the new director. One of the ideas that should emerge is to point up three structures essential to the vitality of IPSL : the Climate model Unit and its contribution to the next IPCC report, a unit that would include the observation Services and the Data Center, and a new unit for the IPSL instrumentation and space activities. The latter will be located in Guyancourt and will serve both IPSL and the outside scientific community. These three key structures, together with aspects related to education and training, will represent the major IPSL pillars for years 2010-2013.
In addition to these main structures, IPSL will also have thematic units such as those which already exist in the field of middle scale processes (PROMETEE Unit) and in the field of planetology and solar system studies (the "Solar System Unit"), and working groups. New units will also progressively be created in order to coordinate studies in few domains such as the one concerning the biogeochemical cycles.
The IPSL organization structures that are described below are still the present ones. They will be replaced by the new structures soon.
The IPSL Climate Modelling Center (ICMC) includes modeling teams from various fields: meteorology, oceanography, study of continental surfaces, ... Its goal is to study natural variability of the climate system and the anthropogenic interference with it in its physical, chemical or biochemical aspects.
Earth environment is an infinitely complex machine, where the most various effects are interacting : solar radiation and infra-red absorption and emission, water condensation and evaporation, heat transport and exchange, etc. Analysis and comprehension of these effects require not only suitable numerical modeling devices, but also powerful statistical tools. Within IPSL, SAMA supports the development and exchange of such tools, as well as knwoledge transfer and savoir-faire.