This proposal will contribute to building two European Storm-Resolving Earth System Models (SR-ESMs), applying them to study the Earth system and answering important open questions about how its climate will change over the next decades.
This is the goal of the associated H2020 project NextGEMS (01.09.2021- 01.09.2025), which supports ongoing efforts to create digital replicas of the Earth in initiatives like the European Commission’s Destination Earth programme.
The global coupled storm-resolving (or km-scale) simulations proposed by NextGEMS are no longer a dream thanks to recent advances in Earth system modelling, supercomputing and the adaptation of weather and climate codes for novel computing architectures. Such simulations explicitly represent essential climate processes, such as deep convection and mesoscale ocean eddies, that until today needed to be parametrized even at the highest resolution used in global weather and climate simulations.
They thus offer a real promise to significantly increase the realism of Earth system simulations. Here the research team proposes to use LUMI-G to perform several NextGEMS simulations (at 2-5 km in the atmosphere and ocean) during the development of the SR-ESMs. This will allow to assess both their realism and their ability to run efficiently on novel architectures.