update to cam6_4_107

Author: brian-eaton

.gitmodules

@@ -36,7 +36,7 @@
 [submodule "atmos_phys"]
 	path = src/atmos_phys
 	url = https://github.com/ESCOMP/atmospheric_physics
-        fxtag = atmos_phys0_14_001
+        fxtag = dev_atmos_phys0_15_000
         fxrequired = AlwaysRequired
 	fxDONOTUSEurl = https://github.com/ESCOMP/atmospheric_physics
 

bld/build-namelist

@@ -738,6 +738,9 @@ elsif ($rad_pkg =~ m/rrtmgp/) {
     $rel_path = $nl->get_value('rrtmgp_coefs_sw_file');
     my $abs_path = quote_string(set_abs_filepath($rel_path, $cam_dir));
     $nl->set_variable_value('radiation_nl', 'rrtmgp_coefs_sw_file', $abs_path);
+
+    add_default($nl, 'p_top_for_rrtmgp');
+
 }
 
 # Solar irradiance

bld/namelist_files/namelist_defaults_cam.xml

@@ -575,6 +575,10 @@
 <rrtmgp_coefs_lw_file>src/physics/rrtmgp/data/rrtmgp-gas-lw-g128.nc</rrtmgp_coefs_lw_file>
 <rrtmgp_coefs_sw_file>src/physics/rrtmgp/data/rrtmgp-gas-sw-g112.nc</rrtmgp_coefs_sw_file>
 
+<p_top_for_rrtmgp>                 10.D0 </p_top_for_rrtmgp>
+<p_top_for_rrtmgp  waccmx="1" >     1.D0 </p_top_for_rrtmgp>
+<p_top_for_rrtmgp  waccm_phys="1" > 1.D0 </p_top_for_rrtmgp>
+
 <!-- CAM-RT absorptivity/emissivity lookup table -->
 <absems_data rad="camrt">atm/cam/rad/abs_ems_factors_fastvx.c030508.nc</absems_data>
 

bld/namelist_files/namelist_definition.xml

@@ -5771,6 +5771,13 @@ Calculate radiative effect of graupel/hail (using snow optics)
 Default: FALSE
 </entry>
 
+<entry id="p_top_for_rrtmgp" type="real"  category="radiation"
+       group="radiation_nl" valid_values="" >
+Top pressure level for RRTMGP
+Default: 1.0 for WACCM/WACCMX
+         10. for all other CAM runs
+</entry>
+
 <entry id="use_rad_dt_cosz" type="logical"  category="radiation"
        group="radiation_nl" valid_values="" >
 If true, then average the zenith angle over the radiation timestep rather

doc/ChangeLog

@@ -76,7 +76,6 @@ cime_config/config_component.xml
 . remove unused (and untested) modifiers %CLB, %RCO2
 . remove modifier %MAM7
 
-
 cime_config/testdefs/testlist_cam.xml
 . add ERI tests for cam5, cam6, and cam7 F compsets:
   replace 
@@ -177,6 +176,97 @@ Summarize any changes to answers:
 ===============================================================
 ===============================================================
 
+Tag name: cam6_4_107
+Originator(s): JulioTBacmeister, perverwhee, cacraigucar
+Date: August 13, 2025
+One-line Summary: RRTMGP mods to support MT configurations
+Github PR URL: https://github.com/ESCOMP/CAM/pull/1353
+
+Purpose of changes (include the issue number and title text for each relevant GitHub issue):
+  - RRTMGP error with mpas and L93 mid-top configuration: https://github.com/ESCOMP/AM/issues/1279
+  - Removes extra logic needed to use RRTMGP in the MT configuration where minimum pressures may fall below 1 Pa - the lower
+    limit of validity for RRTMGP
+  - MT will now use cooling rates from Fomichev radiation above 10 Pa.
+
+Describe any changes made to build system: N/A
+
+Describe any changes made to the namelist:
+  - introduce p_top_for_rrtmgp: Top pressure level for RRTMGP
+
+List any changes to the defaults for the boundary datasets: N/A
+
+Describe any substantial timing or memory changes: N/A
+
+Code reviewed by: peverwhee, cacraigucar
+
+List all files eliminated:
+D       src/physics/waccm/nlte_fomichev.F90
+            - Moved to ESCOMP/atmospheric_physics
+
+List all files added and what they do:
+
+List all existing files that have been modified, and describe the changes:
+M       .gitmodules
+           - Update atmos_phys external tag
+
+M       bld/build-namelist
+M       bld/namelist_files/namelist_defaults_cam.xml
+M       bld/namelist_files/namelist_definition.xml
+           - introduce p_top_for_rrtmgp
+
+M       src/physics/cam/radheat.F90
+M       src/physics/rrtmgp/radiation.F90
+           - Julio's modifications as described above
+
+If there were any failures reported from running test_driver.sh on any test
+platform, and checkin with these failures has been OK'd by the gatekeeper,
+then copy the lines from the td.*.status files for the failed tests to the
+appropriate machine below.  All failed tests must be justified.
+
+  - Numerous NLFAIL due to the new p_top_for_rrtmgp namelist
+
+derecho/intel/aux_cam:
+  ERP_Ld3.ne30pg3_ne30pg3_mt232.FHISTC_MTt4s.derecho_intel.cam-outfrq1d_aoa (Overall: DIFF) details:
+  SMS_D_Ln9.ne30pg3_ne30pg3_mt232.FHISTC_MTso.derecho_intel.cam-outfrq9s (Overall: DIFF) details:
+  SMS_D_Ln9_P1280x1.ne30pg3_ne30pg3_mt232.FHISTC_MTt1s.derecho_intel.cam-outfrq9s_Leung_dust (Overall: DIFF) details:
+    - MT answer changes are expected
+
+  SMS_D_Ln9_P1280x1.ne0CONUSne30x8_ne0CONUSne30x8_mt12.FCHIST.derecho_intel.cam-outfrq9s (Overall: FAIL) details:
+    - pre-existing failure due to build-namelist error requiring CLM/CTSM external update.
+
+derecho/nvhpc/aux_cam: BFB
+
+izumi/nag/aux_cam: all BFB
+
+izumi/gnu/aux_cam: all BFB
+
+CAM tag used for the baseline comparison tests if different than previous
+tag:
+
+Summarize any changes to answers, i.e.,
+- what code configurations:
+- what platforms/compilers:
+- nature of change (roundoff; larger than roundoff but same climate; new
+  climate):
+
+If bitwise differences were observed, how did you show they were no worse
+than roundoff?
+
+If this tag changes climate describe the run(s) done to evaluate the new
+climate in enough detail that it(they) could be reproduced, i.e.,
+- source tag (all code used must be in the repository):
+- platform/compilers:
+- configure commandline:
+- build-namelist command (or complete namelist):
+- MSS location of output:
+
+MSS location of control simulations used to validate new climate:
+
+URL for AMWG diagnostics output used to validate new climate:
+
+===============================================================
+===============================================================
+
 Tag name: cam6_4_106
 Originator(s): kuanchihwang
 Date: July 23, 2025
@@ -362,7 +452,7 @@ ERI_D_Ln18.f10_f10_mg37.QPC5.izumi_nag.cam-outfrq3s_eoyttrac (Overall: NLFAIL)
 PLB_D_Ln9.f10_f10_mg37.QPC5.izumi_nag.cam-ttrac_loadbal0 (Overall: NLFAIL)
 PLB_D_Ln9.f10_f10_mg37.QPC5.izumi_nag.cam-ttrac_loadbal1 (Overall: NLFAIL)
 PLB_D_Ln9.f10_f10_mg37.QPC5.izumi_nag.cam-ttrac_loadbal3 (Overall: NLFAIL)
-SMS_D_Ld2.f45_f45_mg37.PC5.izumi_nag.cam-outfrq24h_port (Overall: NLFAIL) 
+SMS_D_Ld2.f45_f45_mg37.PC5.izumi_nag.cam-outfrq24h_port (Overall: NLFAIL)
 SMS_D_Ln3.ne5pg3_ne5pg3_mg37.QPX2000.izumi_nag.cam-outfrq3s (Overall: NLFAIL)
 SMS_D_Ln6.ne5_ne5_mg37.QPWmaC4.izumi_nag.cam-outfrq3s_physgrid_tem (Overall: NLFAIL)
 SMS_D_Ln9.f10_f10_mg37.QPC5.izumi_nag.cam-rad_diag_mam (Overall: NLFAIL)