FMS API: Convert real kind of constants #768
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Two latent heat constants are imported directly from FMS, which is built independently of MOM6. Previously, it was a safe assumption that both would be built with double precision, but this is no longer the case since FMS now supports both single and double precision. This could cause conflicts with mixed-precision builds. This patch converts the values from FMS-precision to MOM-precision. Single->double should not affect reproducibility since every single-precision number can be exactly represented in double precision. Double->single could affect reproducibility, but this is not an issue since MOM6 does not run in single precision.
Hallberg-NOAA
approved these changes
Dec 8, 2024
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This PR has passed pipeline testing at https://gitlab.gfdl.noaa.gov/ogrp/mom6ci/MOM6/-/pipelines/25705. |
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Two latent heat constants are imported directly from FMS, which is built independently of MOM6. Previously, it was a safe assumption that both would be built with double precision, but this is no longer the case since FMS now supports both single and double precision. This could cause conflicts with mixed-precision builds.
This patch converts the values from FMS-precision to MOM-precision.
Single->double should not affect reproducibility since every single-precision number can be exactly represented in double precision. Double->single could affect reproducibility, but this is not an issue since MOM6 does not run in single precision.