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DTSTAMP:20250822T115806Z
LOCATION:Campussaal - Plenary Room
DTSTART;TZID=Europe/Stockholm:20250616T102000
DTEND;TZID=Europe/Stockholm:20250616T105000
UID:submissions.pasc-conference.org_PASC25_sess149_pos145@linklings.com
SUMMARY:P08 - Developing a Portable Implementation for the Next-Generation
  ECMWF Model
DESCRIPTION:Sara Faghih-Naini (ECMWF); Till Ehrengruber (ETH Zurich / CSCS
 ); Stefano Ubbiali (ETH Zurich); Lukas Papritz (ETH Zurich, ECMWF); and Ch
 ristian Kühnlein (ECMWF)\n\nWe present the development of a portable high-
 level Python implementation for the next-generation ECMWF global dynamical
  core designed to facilitate simulations at extreme numerical resolutions.
  This new model framework, called the Portable Model for Multi-Scale Atmos
 pheric Prediction (PMAP), is an advancement of the Finite-Volume Module (F
 VM) originally developed at ECMWF using Fortran. The key aspect of the glo
 bal PMAP is its implementation utilizing the latest version of the GridToo
 ls for Python (GT4Py) domain-specific library, named gt4py.next. This libr
 ary is tailored to the applied conservative finite-volume discretization m
 ethods that support, among others, the operational octahedral grid at ECMW
 F. The gt4py.next library itself is being co-developed with various Swiss 
 partners and is under continuous extension, optimization, and refinement a
 longside the PMAP framework. The model’s distributed multi-node configurat
 ion employs the Generic exascale-ready library for halo-exchange operation
 s (GHEX). We present recent model validation results and report on perform
 ance, portability, and scalability across selected CPU- and GPU-based supe
 rcomputers.\n\nSession Chair: Chris Cantwell (Imperial College London)\n\n
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