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UID:submissions.pasc-conference.org_PASC24_sess115_msa212@linklings.com
SUMMARY:Can we Build Composable Atmospheric Models Without Sacrificing Per
 formance?
DESCRIPTION:Minisymposium\n\nStefano Ubbiali (ETH Zurich), Christian Kühnl
 ein (ECMWF), Christoph Schär (ETH Zurich), Linda Schlemmer (DWD), Thomas C
 . Schulthess (ETH Zurich / CSCS), and Heini Wernli (ETH Zurich)\n\nAtmosph
 eric models consist of a dynamical core – integrating the equations of mot
 ion on a computational mesh – and physical parameterizations – taking into
  account the bulk effect of subgrid-scale phenomena (e.g. radiative heat t
 ransfer, microphysics, turbulence). For ease of software development, dyna
 mical cores and physics packages have historically been written in isolati
 on, leading to model components based on inconsistent assumptions and feat
 uring incompatible structures. We present recent efforts to devise model c
 omponents with a common and expressive interface, which can be more easily
  transferred between models and favor modular code designs. We discuss the
  challenges and benefits associated with this approach, both from a softwa
 re engineering perspective (e.g. maintainability, reusability, interoperab
 ility, readability) and a scientific point of view (e.g. process coupling)
 . Moreover, we address the integration of modern HPC tools (e.g. domain-sp
 ecific languages) into composable code architectures and discuss potential
  impacts on performance, as compared to a monolithic code design.\n\nDomai
 n: Climate, Weather, and Earth Sciences, Engineering\n\nSession Chairs: Ma
 uro Bianco (ETH Zurich / CSCS, ETH Zurich); Enrique González Paredes (ETH 
 Zurich / CSCS); and Hannes Vogt (ETH Zurich / CSCS)
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