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UID:submissions.pasc-conference.org_PASC24_sess128_msa107@linklings.com
SUMMARY:Enabling km-Scale Coupled Climate Simulations with ICON on GPUs
DESCRIPTION:Minisymposium\n\nJussi Enkovaara (CSC - IT Center for Science)
 ; Claudia Frauen (DKRZ); Daniel Klocke, Lukas Kluft, Luis Kornblueh, and S
 ergey Kosukhin (Max Planck Institute for Meteorology); Tuomas Lunttila (CS
 C - IT Center for Science); and Rene Redler and Reiner Schnur (Max Planck 
 Institute for Meteorology)\n\nThe Icosahedral Nonhydrostatic (ICON) weathe
 r and climate model is a modelling framework for numerical weather predict
 ion and climate simulations. ICON is implemented mostly in Fortran 2008 wi
 th the GPU version based mainly on OpenACC. ICON is used on a large variet
 y of hardware, ranging from classical CPU cluster to vector architecture a
 nd different GPU systems.\n\nAn ICON model configuration developed for km-
 scale climate simulations is used as a scientific prototype for the digita
 l twin of the Earth for climate adaptation within the Destination Earth pr
 ogram of the European Comission. Here we focus on our effort to run these 
 coupled ICON configurations at km-scale on LUMI, a HPE Cray EX system with
  a GPU partition based on AMD MI250x’s.\n\nWe present the model configurat
 ion, performance results and scalability of the simulation system on Lumi 
 and compare it with results on other GPU and CPU based systems.\n\nDomain:
  Climate, Weather, and Earth Sciences\n\nSession Chairs: Claudia Frauen (D
 KRZ) and Balthasar Reuter (ECMWF)
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