ICON-BASED COUPLED OCEAN-ATMOSPHERE DEMONSTRATOR Visualisation of cloud water and ocean currents in a 5km-5km ocean- atmosphere simulation. Left: Global view. Right: Zoom into Carribean sea. A throughput of ca. 20 simulated days/day was achieved on 500 Broadwell nodes (platform: Mistral, DKRZ). ATMOSPHERE-ONLY DEMONSTRATORS Global ICON-based weather forecast, run at a global resolution of 2.5km. Scalability of global high-resolution atmosphere-only simulations using the models IFS and ICON (no I/O). Despite significant achievements for extreme scale simulations, even more effort is required to push the models towards production readiness (target throughput: ca. 365 forecast days/day). References: T.C. Schulthess, P. Bauer et al. IEEE Comput. Sci. Eng. 21(1), 2019, https://doi.org/10.1109/MCSE.2018.2888788 P. Neumann, P. Düben et al. Philos. Trans. Royal Soc. A 377(2142), 20180148, 2019, https://royalsocietypublishing.org/doi/pdf/10.1098/rsta.2018.0148 THE CENTRAL DELIVERABLE: GLOBAL HIGH-RESOLUTION DEMONSTRATORS ESiWACE will deliver global high-resolution demonstrators of atmosphere- only, ocean-only and coupled ocean-atmosphere simulations; a key target is to reach spatial resolutions of ca. 1 km that allow simulating convective clouds and small-scale ocean eddies. This will provide much more fidelity in the representation of high-impact regional events. The demonstrators will allow for computability estimates for these configurations at exascale. They are based on widely used European models (IFS, ICON, NEMO, EC-EARTH). In this context, ESiWACE has been strongly supporting the intercomparison project DYAMOND, integrating both views on performance and science case. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 675191. The poster reflects only the authors’ view. The EC is not responsible for any use that may be made of the information it contains. Visualisations are courtesy by Niklas Röber, DKRZ. © Deutsches Klimarechenzentrum GmbH, Bundesstr. 45a, 20146 Hamburg, Germany OVERVIEW Funding period: 1 Sep 2015 – 31 Aug 2019 Coordination: DKRZ (Joachim Biercamp), ECMWF (Peter Bauer) Consortium: 16 partners from 7 countries Call reference: European research infrastructures, EINFRA-5-2015 The Centre of Excellence in Simulation of Weather and Climate in Europe (ESiWACE) forms a joint scientific community around Earth System Modelling (ESM) from the two communities of Weather and Climate research by leveraging two established European networks: • The European Network for Earth System Modelling • The European Centre for Medium-Range Weather Forecasts The main objectives of ESiWACE are to • Substantially improve efficiency and productivity of numerical Weather and Climate simulation on high-performance computing (HPC) platforms, strengthening the user-driven evolution of the community software • Build a critical mass and create expertise to increase the community impact on hardware development towards the extreme scale as well as future international exascale initiatives THE STORY CONTINUES: ESiWACE2 Funding period: 1 Jan 2019 – 31 Dec 2022 Coordination: DKRZ (Joachim Biercamp), ECMWF (Peter Bauer) Consortium: 20 partners from 9 countries Call reference: European research infrastructures, INFRAEDI-02-2018 The project will push the global high-resolution demonstrators towards production-ready simulations on European pre-exascale and future exascale systems. ESiWACE2 will further focus on exploring and exploiting suitable innovative technologies such as DSLs, on the development of processing tools for more efficient I/O and visualisation and on providing enhanced services, training and benchmarks for the community. ESiWACE Contacts Presenter: Philipp Neumann Web: www.esiwace.eu E-Mail: esiwace@dkrz.de PROJECT IMPACTS AND ACHIEVEMENTS ESiWACE addresses three core themes on the applications’ way towards exascale computing: • Scalability of models and tools