My research focuses on the role of short-lived climate forcers in Earth's climate system. I develop global models to simulate the chemical composition of the atmosphere in interaction with the physical climate and other components of the Earth system. I use these models to study the global and regional climate effects of aerosols, tropospheric ozone, and precursor gases.
I contribute to the development of the European consortium global climate and Earth system model EC-Earth, and serve as chair of the working group on atmospheric composition. I have led the development of the CMIP6 model configuration with interactive aerosols and atmospheric chemistry (EC-Earth3-AerChem), and its application within CMIP6 and AerChemMIP. A key component of EC-Earth3-AerChem is the chemistry and transport model TM5. For many years, I have contributed to the development of TM5 and have served on the TM5 steering committee. My current work focuses on the development of EC-Earth4 in preparation for CMIP7, particularly on advancing the representation of atmospheric composition in OpenIFS, the atmospheric component of EC-Earth4. For atmospheric chemistry, we have developed multiple configurations: one using simplified chemistry with prescribed oxidant concentrations, and others featuring more comprehensive interactive chemistry schemes for the troposphere and stratosphere, based on developments from the Copernicus Atmosphere Monitoring Service (CAMS) programme. For aerosols, we have implemented a modal scheme with state-of-the-art representations of aerosol–radiation and aerosol–cloud interactions. Over the years, I have participated in numerous international projects, including RETRO, AMMA, ACCENT-MIP, a Royal Society study on ground-level ozone, CLIMAQS, ACCMIP, CRESCENDO, and FORCeS. I am currently involved in the Horizon Europe projects FOCI, OptimESM, and CERTAINTY, and remain an active participant in the AeroCom community.
Please have a look at my publications in the KNMI database or on Google Scholar.