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v12: Set default optics to RRTMGP#389

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feature/v12-rrtmgp-default
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v12: Set default optics to RRTMGP#389
mathomp4 wants to merge 1 commit intodevelopfrom
feature/v12-rrtmgp-default

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@mathomp4 mathomp4 commented Mar 3, 2026

In GEOSgcm v12, we have moved from RRTMG to RRTMGP by default. However, GOCART has continued with RRTMG optics by default.

So, this PR updates it to be RRTMGP by default. This is zero-diff because, at the moment, we do sed shenanigans in gcm_run.j to change these lines at run time to RRTMGP.

NOTE: This will require changes in GEOSgcm_App for running with RRTMG. See GEOS-ESM/GEOSgcm_App#815

cc: @sdrabenh

@mathomp4 mathomp4 self-assigned this Mar 3, 2026
@mathomp4 mathomp4 requested a review from a team as a code owner March 3, 2026 15:18
@mathomp4 mathomp4 added the 0 diff The changes in this pull request have verified to be zero-diff with the target branch. label Mar 3, 2026
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