The Atmospheric Composition Component of the ICON modeling framework: ICON-ART version 2025.04

Hoshyaripour, Gholam Ali; Baer, Andreas; Bierbauer, Sascha; Bruckert, Julia; Brunner, Dominik; Foerstner, Jochen; Hamzehloo, Arash; Hanft, Valentin; Keller, Corina; Klose, Martina; Kumar, Pankaj; Ludwig, Patrick; Metzner, Enrico; Muth, Lisa; Pauling, Andreas; Porz, Nikolas; Reddmann, Thomas; Reißig, Luca; Ruhnke, Roland; Satitkovitchai, Khompat; Seifert, Axel; Sinnhuber, Miriam; Steiner, Michael; Versick, Stefan; Vogel, Heike; Weimer, Michael; Werchner, Sven; Hoose, Corinna

doi:https://doi.org/10.5194/egusphere-2025-3400

Gholam Ali Hoshyaripour, Andreas Baer, Sascha Bierbauer, Julia Bruckert, Dominik Brunner, Jochen Foerstner, Arash Hamzehloo, Valentin Hanft, Corina Keller, Martina Klose, Pankaj Kumar, Patrick Ludwig, Enrico Metzner, Lisa Muth, Andreas Pauling, Nikolas Porz, Thomas Reddmann, Luca Reißig, Roland Ruhnke, Khompat Satitkovitchai, Axel Seifert, Miriam Sinnhuber, Michael Steiner, Stefan Versick, Heike Vogel, Michael Weimer, Sven Werchner, and Corinna Hoose

Abstract. Accurate and efficient modeling of atmospheric composition, including aerosols and trace gases and their interactions with radiation, clouds, and dynamics is essential for improving predictions of air quality, weather, climate, and related health impacts. The ART (Aerosols and Reactive Trace gases) component extends the ICOsahedral Nonhydrostatic (ICON) modeling framework by enabling online, fully coupled simulations of atmospheric composition processes across scales. ART includes modules for emissions, transport, gas-phase chemistry, and aerosol microphysics in both the troposphere and stratosphere, allowing for the investigation of feedbacks between atmospheric composition and physical processes from the large-eddy to global scale.

This paper presents an updated overview of the ICON-ART framework as implemented in version 2025.04, highlighting recent developments in emission parameterizations, chemical mechanisms, aerosol processes, and coupling to the physical core of ICON via aerosol–radiation and aerosol–cloud interactions. We summarize the structure of the code infrastructure and demonstrate the model’s flexibility and scalability across a wide range of applications. ICON-ART provides a unified and modular platform for research and operational use in atmospheric composition, bridging the gap between regional air quality modeling and global Earth system simulations.

How to cite. Hoshyaripour, G. A., Baer, A., Bierbauer, S., Bruckert, J., Brunner, D., Foerstner, J., Hamzehloo, A., Hanft, V., Keller, C., Klose, M., Kumar, P., Ludwig, P., Metzner, E., Muth, L., Pauling, A., Porz, N., Reddmann, T., Reißig, L., Ruhnke, R., Satitkovitchai, K., Seifert, A., Sinnhuber, M., Steiner, M., Versick, S., Vogel, H., Weimer, M., Werchner, S., and Hoose, C.: The Atmospheric Composition Component of the ICON modeling framework: ICON-ART version 2025.04, EGUsphere [preprint], https://doi.org/10.5194/egusphere-2025-3400, 2025.

Received: 15 Jul 2025 – Discussion started: 12 Sep 2025

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