Version 2.1.001 Patch Release

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Version 2.1.001 Patch Release

This patch release adds new features and addresses issues in the EarthWorks version 2.1 release. Specifically:

• Fixes compilation of the “FullyCoupled” compset on CPUs which was broken by changes in EarthWorksOrg/mpas-framework in the v2.1 release.
  • Compilers affected: all.
  • See EarthWorksOrg/EarthWorks Issue #31.
• Eliminates the need to use the CICE model in “prescribed mode” by replacing it with a simliar MPAS-SeaIce model on the native MPAS grid. This change may also address a CICE compilation issue observed on Perlmutter.
  • Compiler affected: NVHPC v24.1.
  • Cases that use NVHPC compilers should use MPASSI%PRES instead of CICE%PRES in their compset requests.
  • See EarthWorksOrg/EarthWorks Issue #23 for a discussion of the compilation issue. Note: the issue has not been reproduced on NCAR’s Derecho system.
• Adds RRTMGP as a radiation parameterization by incorporating upstream work.
  • See EarthWorksOrg/CAM PR #14 and ESCOMP/CAM PR #909

Try the New Features

To try the “prescribed mode” for MPAS-SeaIce, you will need to request it in your compset value when you create a case with MPASSI%PRES. For example, try --compset 2000_CAM60_CLM50%SP_MPASSI%PRES_DOCN%DOM_MOSART_CISM2%NOEVOLVE_SWAV when creating a case. Note: you should also use a grid with an ocean defined like mpasa120_oQU120 for MPAS-SeaIce to work correctly.

To try RRTMGP, you should first create a case and then (within the case directory) run ./xmlchange --append CAM_CONFIG_OPTS=“-rad rrtmgp”.

Please let the EarthWorks team know if you have any problems by reporting an Issue and describing what you noticed!

Known Issues

Known issues with the EarthWorks 2.1 patch release include:

• Compiling any case that uses multiple MPAS-based components (CAM-MPAS, MPAS-Ocean, MPAS-SeaIce) with GPU offload flags enabled causes the build to fail due to Multiple definition errors.
  • See EarthWorksOrg/EarthWorks Issue #36.
  • See EarthWorks Case on GPUs in the wiki for instructions about “GPU offload flags”
• Cases that use CAM-MPAS (QPC6, F2000Climo, Fully Coupled) and NVHPC compilers and attempt a restart, fail during initialization of the restart run.
  • See EarthWorksOrg/EarthWorks Issue #21
  • This issue is carried over from the 2.0 release.

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This discussion was created from the release Version 2.1.001 Patch Release.