The research activities carried out by the Paleoclimates and Sedimentary Dynamics (Paléoclimats et Dynamique Sédimentaire; PDS) team in the GEOPS Laboratory (UMR-CNRS 8148) focus on reconstructing Quaternary climatic changes at various time scales (ten-year to orbital scales) by studying existing interactions within the external compartments of the Earth’s system (oceans, atmosphere, continental surfaces).
The aim of this research is to gain a better understanding of:
These three main themes together depend on the calibration of paleo-oceanographic tracers. They are essentially based on the study of marine and lacustrine sedimentary archives, which present temporal frameworks that are constrained by stratigraphical and radiometric methods and/or by tephrochronology.
The research activities of the team are based on the use of various tools (the PANOPLY platform) within the fields of sedimentology (granulometry), mineralogy (clays), paleontology (coccolithophores, foraminifera, deep sea corals), and elemental- (Mg/Ca, Sr/Ca, Br/Ca, etc.) and isotopic- (δ18O, δ13C, εNd, 87Sr/86Sr) geochemistry.