The 14th MESSy Symposium took place from May 19 to May 21, 2026, at the Scientific Computing Center (SCC) at KIT Campus North. The symposium brought together researchers and scientists in the fields of climate, atmospheric, and Earth system science and focused on recent developments related to the Modular Earth Submodel System (MESSy), which is used to simulate complex interactions within the atmosphere, oceans, and the environment.
During the event, participants presented current research results, discussed new modelling approaches, and strengthened collaborations between different research groups. A particular focus was placed on the different model configurations used within the MESSy community, including EMAC (ECHAM/MESSy), ICON/MESSy, and MECO (MESSy/COSMO). Topics covered ranged from climate processes and atmospheric chemistry to transport modelling, high-performance computing, and advances in Earth system modelling.
The symposium was attended by 52 participants from 9 organizations, including 3 international institutions, highlighting the strong collaborative and interdisciplinary character of the MESSy community.
Several contributions showed simulation results performed on HPC systems provided through the German National High-Performance Computing (NHR) alliance, including HoreKa (KIT) and MOGON, underlining the growing importance of NHR resources for Earth system modelling and atmospheric research. In addition, many large-scale simulations presented at the symposium were carried out on Tier-1 systems such as Levante, SuperMUC, the HPC systems of the Jülich Supercomputing Center JUWELS, JURECA, and JUPITER.
The scientific program was complemented by two joint dinners, providing an excellent opportunity for attendees to discuss future developments and strengthen connections within the MESSy community. The event was well-received, highlighting the collaborative spirit and ongoing advancements within the atmospheric modelling framework.