ATMO-SERV is a Horizon Europe project that brings together Europe’s leading atmospheric research infrastructures, including ACTRIS, ICOS, IAGOS, EISCAT_3D and SIOS, to provide integrated access to state-of-the-art facilities, observational networks, laboratories, aircraft platforms, digital services, and data repositories. The project aims to advance fundamental understanding of atmospheric chemistry, air quality, climate change, extreme events, and their impacts on ecosystems and human health b