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UID:submissions.pasc-conference.org_PASC24_sess148_msa139@linklings.com
SUMMARY:The Energy Efficiency and Carbon Footprint of ICON Climate Model S
 imulations at CSCS
DESCRIPTION:Minisymposium\n\nWilliam Sawyer (ETH Zurich / CSCS)\n\nIn an e
 nvironmental impact case study of computing at the Swiss National Supercom
 puting Center (CSCS) we consider the energy consumption of climate simulat
 ions currently planned on the new CSCS "Alps" computing platform. We use t
 he Icosahedral Non-hydrostatic (ICON) model, which has been extensively re
 factored within the https://c2sm.ethz.ch/research/exclaim.html project to 
 improve its performance on already highly energy-efficient Nvidia Hopper G
 raphics Processing Units (GPUs). ICON simulations will use a substantial f
 raction of the overall Alps resources when it comes fully online. We brief
 ly present these optimization efforts as well as our latest ICON benchmark
 s, and then extrapolate to the overall energy consumption needed for scien
 tific use cases planned within the EXCLAIM project. The energy projections
  for these runs are crucial to budget for electricity, but accounting for 
 the carbon footprint is also part of our societal obligation. As part of a
 n ongoing carbon footprint study, we outline the energy efficiency of the 
 CSCS infrastructure -- its power usage effectiveness and the power efficie
 ncy of the computing platform -- and quantify the CO2-equivalent emissions
  for these simulations.  We leave it to the audience to decide if we are l
 iving up to our environmental obligations while still promoting this impor
 tant research area.\n\nDomain: Climate, Weather, and Earth Sciences, Appli
 ed Social Sciences and Humanities, Engineering\n\nSession Chairs: Jan Fred
 erik Engels (DKRZ) and William Sawyer (ETH Zurich / CSCS)
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