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part of cam6_4_154: ne16pg3 configuration LT and MT out-of-the-box #1488

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Merged
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Feb 24, 2026
Merged

part of cam6_4_154: ne16pg3 configuration LT and MT out-of-the-box #1488

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13 changes: 8 additions & 5 deletions bld/namelist_files/namelist_defaults_cam.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -184,6 +184,8 @@
<ncdata hgrid="ne16np4" nlev="126" waccmx="1" aquaplanet="1" >atm/waccm/ic/waccmx_aqua_ne16np4_126L_c191108.nc</ncdata>
<ncdata hgrid="ne16np4" nlev="126" waccmx="1" aquaplanet="1" ionosphere="none">atm/waccm/ic/waccmx4_neutral_aquap_ne16np4_126lev_c200827.nc</ncdata>
<ncdata hgrid="ne16np4" nlev="130" waccmx="1" >atm/waccm/ic/FX2000_ne16pg3_spinup01.cam.i.0002-01-01_c251215.nc</ncdata>
<ncdata hgrid="ne16np4" nlev="58" >atm/cam/inic/se/FHISTC_LTso_ne16pg3_ne16pg3_mg17.i.c260220.nc</ncdata>
<ncdata hgrid="ne16np4" nlev="93" >atm/cam/inic/se/FHISTC_MTso_ne16pg3_ne16pg3_mg17.i.c260220.nc</ncdata>

<ncdata hgrid="ne30np4" nlev="26" >atm/cam/inic/se/ape_topo_cam4_ne30np4_L26_c171020.nc</ncdata>
<ncdata hgrid="ne30np4" nlev="26" aquaplanet="1" >atm/cam/inic/se/ape_cam4_ne30np4_L26_c170417.nc</ncdata>
Expand Down Expand Up @@ -3207,7 +3209,8 @@
<se_hypervis_subcycle > 3 </se_hypervis_subcycle>
<se_hypervis_subcycle waccm_phys="1" model_top="mt" > 3 </se_hypervis_subcycle>
<se_hypervis_subcycle waccm_phys="1" > 2 </se_hypervis_subcycle>
<se_hypervis_subcycle hgrid="ne16np4" > 4 </se_hypervis_subcycle>
<se_hypervis_subcycle hgrid="ne16np4" > 3 </se_hypervis_subcycle>
<se_hypervis_subcycle hgrid="ne16np4" model_top="lt" > 1 </se_hypervis_subcycle>
<se_hypervis_subcycle hgrid="ne16np4" waccm_phys="1" model_top="none"> 10 </se_hypervis_subcycle>
<se_hypervis_subcycle hgrid="ne16np4" waccm_phys="1" waccmx="0" model_top="none"> 9 </se_hypervis_subcycle>
<se_hypervis_subcycle hgrid="ne30np4" waccm_phys="1" waccmx="0" model_top="none"> 8 </se_hypervis_subcycle>
Expand Down Expand Up @@ -3249,16 +3252,16 @@
<se_max_hypervis_courant se_refined_mesh="1" hypervis_type="scalar" > 1.9 </se_max_hypervis_courant>

<se_nu>-1</se_nu>
<se_nu hgrid="ne16np4" waccm_phys="1" waccmx="0">6.e15</se_nu>
<se_nu hgrid="ne16np4" model_top="ht" >6.e15</se_nu>
<se_nu hgrid="ne16np4">6.e15</se_nu>
<se_nu waccmx="1">5.e15</se_nu>

<se_nu_div> -1 </se_nu_div>
<se_nu_div hgrid="ne16np4" waccm_phys="1" waccmx="0">6.e15</se_nu_div>
<se_nu_div hgrid="ne16np4" model_top="ht" >6.e15</se_nu_div>
<se_nu_div hgrid="ne16np4">6.e15</se_nu_div>
<se_nu_div waccmx="1"> 10.e15 </se_nu_div>

<se_nu_p>-1 </se_nu_p>
<se_nu_p hgrid="ne16np4">6.e15</se_nu_p>
<se_nu_p waccmx="1">5.e15</se_nu_p>

<se_nu_top > 1.25e5 </se_nu_top>
<se_nu_top waccmx="1" > 1.0e6 </se_nu_top>
Expand Down
20 changes: 20 additions & 0 deletions doc/ChangeLog
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Original file line number Diff line number Diff line change
@@ -1,3 +1,23 @@
Tag name: cam6_4_???
Originator(s): pel
Date: 20 Feb 2026
One-line Summary: MT & LT ne16pg3 namelist defaults for dycore and inic
Github PR URL: https://github.com/ESCOMP/CAM/pull/1470

Purpose of changes (include the issue number and title text for each relevant GitHub issue):

Issue #1487
- 2 degree (ne16pg3) out-of-the-box LT and MT functionality

Describe any changes made to build system: N/A

Describe any changes made to the namelist:

Change ncdata and dycore parameters
Fix se_nu_p bug for ne16pg3 in namelist

Answer changes expected for all ne16 regression tests.

===============================================================

Tag name: cam6_4_153
Expand Down