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cam6_4_214: Sponge layer, WACCM and other misc changes - #1730
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cacraigucar merged 23 commits intoOct 21, 2026
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Assisted-by: claude-fable:5
modified: src/ionosphere/waccmx/edynamo.F90
modified: src/ionosphere/waccmx/ionosphere_interface.F90
modified: bld/build-namelist modified: bld/namelist_files/namelist_defaults_cam.xml modified: bld/namelist_files/use_cases/1850_cam_lt.xml modified: bld/namelist_files/use_cases/hist_cam_lt.xml modified: bld/namelist_files/use_cases/waccm_ma_hist_cam7.xml modified: bld/namelist_files/use_cases/waccm_sc_hist_cam7.xml
modified: bld/namelist_files/namelist_defaults_cam.xml modified: bld/namelist_files/use_cases/waccm_ma_hist_cam7.xml modified: bld/namelist_files/use_cases/waccm_sc_hist_cam7.xml
modified: bld/namelist_files/namelist_defaults_cam.xml
…hes tanh profile)
modified: bld/namelist_files/namelist_defaults_cam.xml
…n_mmr' into cam_sponge
Snapshot tapes now carry lat_rad and lon_rad, the column latitude and longitude in radians as the physics grid hands them to parameterizations, on both the before and after tapes. The history coordinates lat and lon are in degrees, and converting them back to radians in CAM-SIMA differs from CAM's values by one ulp at some columns (44 of 486 at ne3pg3), which seeds answer differences in every latitude-dependent scheme tested through FPHYStest. The CAM-SIMA null dycore prefers these fields when present. Answer impact: none (two new diagnostic fields on snapshot tapes only). Assisted-by: claude-fable:5.1
Co-authored-by: Courtney Peverley <courtneyp@ucar.edu>
peverwhee
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Oct 19, 2026
cacraigucar
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Closes #1727 Sponge bug fix LT
Closes #1704 Use total bin mass in insoluble aerosol optics
Closes #1708 Corrections to the conductances labeling
Closes #1729 update fv3 tests to use mt233 mask
Closes #1703 diff_sponge_fac incorrectly defaults to 0.1 (WACCM value) for CAM7 MT runs with T4S2 chemistry
Closes #1725 Update WACCM7 default namelist
Closes #1731 Write lat_rad, lon_rad to snapshot for CCPPization (CAM-SIMA)