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DTSTAMP:20260421T090514Z
LOCATION:Bldg. 6 - Room 103
DTSTART;TZID=Europe/Stockholm:20260701T090000
DTEND;TZID=Europe/Stockholm:20260701T093000
UID:submissions.pasc-conference.org_PASC26_sess153_msa193@linklings.com
SUMMARY:PSyclone: A Story of Co-design for Scientific Functionality and Pe
 rformance Portability in the Momentum® Modelling Framework
DESCRIPTION:Iva Kavcic (Met Office)\n\nWeather and climate modelling are a
 mong the most computationally intensive scientific applications, requiring
  exascale computing to significantly improve prediction and projection cap
 abilities. These complex codes are collaboratively developed across instit
 utions and run on various computing architectures, making performance port
 ability essential.\nDeveloping code that runs efficiently across different
 , heterogeneous exascale platforms is challenging. PSyclone, a source-to-s
 ource Fortran compiler designed to programmatically optimise, parallelise,
  and instrument HPC applications, addresses this challenge by decoupling t
 he scientific logic, expressed in the Fortran code, from the parallelisati
 on and optimisation details encoded in user-provided transformation script
 s. This separation of concerns facilitates maintainability as each aspect 
 can be investigated and developed largely independently, and tackles perfo
 rmance portability by writing different scripts for different platforms. P
 Syclone offers two operational modes: direct transformation of existing Fo
 rtran code, and support for developing Fortran-embedded domain-specific la
 nguages (DSLs). The first approach is used in the NEMO modelling framework
 , whilst LFRic, the new Met Office’s weather and climate model, has been c
 o-designed with PSyclone using the latter approach. Both are key component
 s of Momentum®, a new Unified Earth Environment Prediction Framework creat
 ed by the Met Office and its partners to deliver a seamless modelling capa
 bility that meets the challenges of exascale computing.\n\nDomain: Climate
 , Weather, and Earth Sciences, Computational Methods and Applied Mathemati
 cs\n\nSession Chairs: Georgiana Mania (DKRZ) and Xavier Lapillonne (MeteoS
 wiss)\n\n
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