The prestigious Clarivate list of the Highly Cited Researchers 2025 includes Professor Johan Six, Head of the Sustainable Agroecosystem Group at ETH Zurich, and Professor Athanasios Nenes, Head of the Laboratory of atmospheric processes and their impacts at EPFL. The list, which is compiled annually, highlights researchers whose scientific publications are in the top 1% internationally in their field, and it is a significant honor.

Highly Cited Researchers represent 1 in 1,000 of the global population of scientists, demonstrating significant and broad influence in their fields of research. Clarivate publishes the list of distinguished researchers, “Highly Cited Researchers,” and supports it with data from the reliable database, “Web of Science”.

Johan Six is included for the ninth consecutive year in the internationally recognized list of Clarivate. His research focuses on the feedbacks between agroecosystem management options, biogeochemical cycling, food system functioning and global change. More specifically, his group studies how management affects the complex interactions between soil, plants, and carbon and nutrient fluxes within agroecosystems and its implications for food system functioning within a continuously changing global environment. His group conducts experimental work from the microscale to the landscape scale and subsequently integrates its findings into simulation modeling to underpin the mechanistic bases of the used models, and predict agroecosystem and food system functioning across space and time. Johan Six has been Full Professor of Sustainable Agroecosystems at the Institute of Agricultural Sciences since March 2013.

Athanasios Nenes is included for the sixth consecutive year in the internationally recognized Clarivate list in the field of geosciences. He is a Professor of Atmospheric Processes at the Ecole Polytechnique de Lausanne (EPFL) in Switzerland, a Corresponding Researcher at the Institute of Chemical Engineering Sciences (FORTH/ICEMH) and a Coordinating Member of the Center for the Study of Air Quality and Climate Change (C-STACC), and of the Laboratory of Atmospheric Processes and their Impacts at FORTH/ICE-HT (LAPI@FORTH).

Among his many research activities, Prof. Nenes is the Lead PI of ReCLEAN. He is also the coordinator and lead author of Working Group I, Chapter 4 of the Seventh Assessment Report of the Intergovernmental Panel on Climate Change.

Prof. Nenes’ research focuses on atmospheric processes and their critical impacts on climate, health, and ecosystems through a combination of cutting-edge theory, measurements, and modeling. A central focus of his work is atmospheric particulate matter (aerosols), with his studies combining observations, theory, and modeling.