Thesis topic: Arctic Ocean, under joint international supervision by Paris Saclay/UQÀM

Reconstructing past changes in ocean dynamics and the carbon cycle is important not only for understanding climate variability but also for assessing the future fate of anthropogenic carbon. Natural archives such as marine sediments provide access to variations in the circulation and chemistry of water masses in the past, particularly through the geochemical signature of biomineral deposits such as those found in microfossil shells. Furthermore, the Arctic is an environment that is likely to undergo very large-scale changes in the future, but whose natural variations remain poorly documented. This thesis project aims to trace changes in the dynamics of water masses and their physicochemical properties in the Arctic Ocean, in order to reconstruct for the first time variations in temperature, salinity, and nutrient content on the scale of glacial-interglacial cycles based on the study and geochemical analysis of foraminifera from two marine sediment cores. This thesis will be conducted under the joint supervision of the University of Paris-Saclay (France) and the University of Quebec in Montreal (Canada), under the supervision of Sophie Sepulcre (professor-researcher at the University of Paris Saclay, sophie.sepulcre@universite-paris-saclay.fr) and Anne de Vernal (Professor at UQÀM, devernal.anne@uqam.ca).

Details of the project and application procedures before March 22, 2026 are available here: https://adum.fr/, Ile-de-France Environmental Sciences Doctoral School – SEIF 129, GEOPS UMR 8148 laboratory.