Energy Exascale Earth System Model Project
Published October 22, 2025 | Version 0.1.0-alpha
Software Open

Omega: The Ocean Model for E3SM Global Applications, Version 0.1.0-alpha

Authors/Creators

  • 1. ROR icon Los Alamos National Laboratory
  • 2. ROR icon Argonne National Laboratory
  • 3. ROR icon Oak Ridge National Laboratory
  • 4. ROR icon Sandia National Laboratories

Description

Omega, the Ocean Model for E3SM Global Applications, is a new ocean model designed to run efficiently on high performance computing (HPC) platforms, including exascale heterogeneous architectures with accelerators, such as Graphics Processing Units (GPUs). Omega is written in C++ and uses the Kokkos performance portability library. These were chosen because they are well-supported, and will help future-proof Omega for upcoming HPC architectures. Omega will eventually replace the Model for Prediction Across Scales-Ocean (MPAS-Ocean) in the US Department of Energy's Energy Exascale Earth System Model (E3SM).  Omega runs on unstructured horizontal meshes with variable-resolution capability and implements the same horizontal discretization as MPAS-Ocean. In this paper, we document the design and performance of Omega Version 0.1.0 (Omega-V0), which solves the shallow water equations with passive tracers and is the first step towards the full primitive equation ocean model. 

Files

Omega-v0.1.0-alpha.1.zip

Files (32.2 MB)

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Additional details

Dates

Created
2025-07-17
Model Tag Date

Software

Repository URL
https://github.com/E3SM-Project/Omega/releases/tag/Omega-v0.1.0-alpha.1
Programming language
C++
Development Status
Active