Gerrit de Leeuw is Professor Emiritus from the University of Helsinki and the Finnish Meteorological Institute. He joined KNMI in 2020 and is a visiting professor (2016-present), PIFI Fellow (2024-present) and Foreign Expert (2025-2026) at AIRCAS (Beijing), China. His current interests are satellite remote sensing of aerosols and GHG and the application in air quality and climate studies. He is a member of the Council of the International Society of Digital Earth (ISDE). Web of Science H-index 58, Google Scholar 75.