Raoul-Marie is a full professor in the Department of Chemistry at Université Laval, Québec, Canada. His research explores how aquatic environments respond to environmental change, including the cycles of essential elements and the chemistry of contaminants and micronutrients. Working closely with local communities, his team samples lakes, rivers, glaciers, soils, and sediments across northern landscapes. Using a multidisciplinary approach, they combine fieldwork, laboratory experiments, and numerical modeling to understand key processes controlling element mobility from the molecular to the ecosystem scale.