I study the interaction between marine microbial plankton and the Earth's climate by means of experimental studies, oceanographic cruises, analysis of data acquired by autonomous platforms and models. Most of my research has focused on the upper-ocean biogeochemical cycling of dimethylsulfide (DMS), a biogenic gas that affects aerosols and clouds. Research on the marine sulfur cycle has brought me to the Arctic, Antarctic and Indian Oceans and the Mediterranean Sea. I also developed DMS-SAT, an algorithm that allows estimating marine dimethylsulfide emission from remote sensing data. In 2018 I started a new research line to study the biological carbon pump, focusing on the fate of organic particles in the oceans’ twilight zone. Bio-optics, light-driven processes, microbial ecology and biogeochemical budgets are cross-cutting themes in my research. Since 2023 I am co-chair of the SCOR Working Group DMS-PRO.