diff --git a/bld/namelist_files/namelist_defaults_cam.xml b/bld/namelist_files/namelist_defaults_cam.xml
index cd616aad15..28de90a905 100644
--- a/bld/namelist_files/namelist_defaults_cam.xml
+++ b/bld/namelist_files/namelist_defaults_cam.xml
@@ -287,19 +287,19 @@
 <ncdata hgrid="mpasa120" nlev="70" waccm_phys="1">atm/waccm/ic/mpasa120km.waccm_fulltopo_c220818.nc</ncdata>
 
 <ncdata hgrid="mpasa480" nlev="32" ic_ymd="20000101" >atm/cam/inic/mpas/cami_01-01-2000_00Z_mpasa480_L32_CFSR_c211013.nc</ncdata>
-<ncdata hgrid="mpasa480" nlev="32" ic_ymd="20000101" phys="cam_dev" >atm/cam/inic/mpas/cami_01-01-2000_00Z_mpasa480_L32_CFSR_c240508.nc</ncdata>
+<!-- <ncdata hgrid="mpasa480" nlev="32" ic_ymd="20000101" phys="cam_dev" >atm/cam/inic/mpas/cami_01-01-2000_00Z_mpasa480_L32_CFSR_c240508.nc</ncdata> -->
 <ncdata hgrid="mpasa120" nlev="32" ic_ymd="20000101" >atm/cam/inic/mpas/cami_01-01-2000_00Z_mpasa120_L32_CFSR_c210426.nc</ncdata>
-<ncdata hgrid="mpasa120" nlev="32" ic_ymd="20000101" phys="cam_dev" >atm/cam/inic/mpas/cami_01-01-2000_00Z_mpasa120_L32_CFSR_c240508.nc</ncdata>
+<!-- <ncdata hgrid="mpasa120" nlev="32" ic_ymd="20000101" phys="cam_dev" >atm/cam/inic/mpas/cami_01-01-2000_00Z_mpasa120_L32_CFSR_c240508.nc</ncdata> -->
 <!-- Next 4 entries are EarthWorks specific, real-data ICs -->
 <ncdata hgrid="mpasa60"  nlev="32" ic_ymd="20000101" >atm/cam/inic/mpas/cami_01-01-2000_00Z_mpasa60_L32_CFSR_c210518.nc</ncdata>
-<ncdata hgrid="mpasa60"  nlev="32" ic_ymd="20000101" phys="cam_dev" >atm/cam/inic/mpas/cami_01-01-2000_00Z_mpasa60_L32_CFSR_c240508.nc</ncdata>
+<!-- <ncdata hgrid="mpasa60"  nlev="32" ic_ymd="20000101" phys="cam_dev" >atm/cam/inic/mpas/cami_01-01-2000_00Z_mpasa60_L32_CFSR_c240508.nc</ncdata> -->
 <ncdata hgrid="mpasa30"  nlev="32" ic_ymd="20000101" >atm/cam/inic/mpas/cami_01-01-2000_00Z_mpasa30_L32_CFSR_230302.nc</ncdata>
-<ncdata hgrid="mpasa60"  nlev="32" ic_ymd="20000101" phys="cam_dev" >atm/cam/inic/mpas/cami_01-01-2000_00Z_mpasa30_L32_CFSR_c240508.nc</ncdata>
+<!-- <ncdata hgrid="mpasa60"  nlev="32" ic_ymd="20000101" phys="cam_dev" >atm/cam/inic/mpas/cami_01-01-2000_00Z_mpasa30_L32_CFSR_c240508.nc</ncdata> -->
 <!-- Next 4 entries are EarthWorks specific, 58 vertical levels -->
 <ncdata hgrid="mpasa120" nlev="58" ic_ymd="20000101">atm/cam/inic/mpas/cami_01-01-2000_00Z_mpasa120_L58_c230901.nc</ncdata>
-<ncdata hgrid="mpasa120" nlev="58" ic_ymd="20000101" phys="cam_dev" >atm/cam/inic/mpas/cami_01-01-2000_00Z_mpasa120_L58_CFSR_c240508.nc</ncdata>
+<!-- <ncdata hgrid="mpasa120" nlev="58" ic_ymd="20000101" phys="cam_dev" >atm/cam/inic/mpas/cami_01-01-2000_00Z_mpasa120_L58_CFSR_c240508.nc</ncdata> -->
 <ncdata hgrid="mpasa15"  nlev="58" ic_ymd="20000101">atm/cam/inic/mpas/cami_01-01-2000_00Z_mpasa15_L58_c230316.nc</ncdata>
-<ncdata hgrid="mpasa15"  nlev="58" ic_ymd="20000101" phys="cam_dev" >atm/cam/inic/mpas/cami_01-01-2000_00Z_mpasa15_L58_CFSR_c240508.nc</ncdata>
+<!-- <ncdata hgrid="mpasa15"  nlev="58" ic_ymd="20000101" phys="cam_dev" >atm/cam/inic/mpas/cami_01-01-2000_00Z_mpasa15_L58_CFSR_c240508.nc</ncdata> -->
 
 <!-- Topography -->
 <bnd_topo hgrid="256x512" >atm/cam/topo/topo-from-cami_0000-01-01_256x512_L26_c030918.nc</bnd_topo>
@@ -357,19 +357,19 @@
 <bnd_topo hgrid="ne0np4.ARCTICGRIS.ne30x8" >atm/cam/topo/se/ne30x8_ARCTICGRIS_nc3000_Co060_Fi001_MulG_PF_RR_Nsw042_c200428.nc</bnd_topo>
 
 <bnd_topo hgrid="mpasa480" >atm/cam/topo/mpas_480_nc3000_Co240_Fi001_MulG_PF_Nsw170.nc</bnd_topo>
-<bnd_topo hgrid="mpasa480" phys="cam_dev" >atm/cam/topo/mpas/mpasa480_gmted2010_modis_bedmachine_nc3000_Laplace0400_noleak_20240507.nc</bnd_topo>
+<!-- <bnd_topo hgrid="mpasa480" phys="cam_dev" >atm/cam/topo/mpas/mpasa480_gmted2010_modis_bedmachine_nc3000_Laplace0400_noleak_20240507.nc</bnd_topo> -->
 <bnd_topo hgrid="mpasa120" >atm/cam/topo/mpas/mpas_120_nc3000_Co060_Fi001_MulG_PF_Nsw042_c200921.nc</bnd_topo>
-<bnd_topo hgrid="mpasa120" phys="cam_dev" >atm/cam/topo/mpas/mpasa120_gmted2010_modis_bedmachine_nc3000_Laplace0100_noleak_20240507.nc</bnd_topo>
+<!-- <bnd_topo hgrid="mpasa120" phys="cam_dev" >atm/cam/topo/mpas/mpasa120_gmted2010_modis_bedmachine_nc3000_Laplace0100_noleak_20240507.nc</bnd_topo> -->
 <!-- Next 3 entires are EarthWorks specific, for real-data cases not in ESCOMP/CAM -->
 <bnd_topo hgrid="mpasa60"  >atm/cam/topo/mpas_60_nc3000_Co030_Fi001_MulG_PF_Nsw021.nc</bnd_topo>
-<bnd_topo hgrid="mpasa60"  phys="cam_dev" >atm/cam/topo/mpas/mpasa60_gmted2010_modis_bedmachine_nc3000_Laplace0050_noleak_20240507.nc</bnd_topo>
+<!-- <bnd_topo hgrid="mpasa60"  phys="cam_dev" >atm/cam/topo/mpas/mpasa60_gmted2010_modis_bedmachine_nc3000_Laplace0050_noleak_20240507.nc</bnd_topo> -->
 <bnd_topo hgrid="mpasa30"  >atm/cam/topo/mpas_30_nc3000_Co015_Fi001_MulG_PF_Nsw011.nc</bnd_topo>
-<bnd_topo hgrid="mpasa30"  phys="cam_dev" >atm/cam/topo/mpas/mpasa30_gmted2010_modis_bedmachine_nc3000_Laplace0025_noleak_20240507.nc</bnd_topo>
+<!-- <bnd_topo hgrid="mpasa30"  phys="cam_dev" >atm/cam/topo/mpas/mpasa30_gmted2010_modis_bedmachine_nc3000_Laplace0025_noleak_20240507.nc</bnd_topo> -->
 <bnd_topo hgrid="mpasa15"  >atm/cam/topo/mpas_15_nc3500_c20230315.nc</bnd_topo>
-<bnd_topo hgrid="mpasa15"  phys="cam_dev" >atm/cam/topo/mpas/mpasa15_gmted2010_modis_bedmachine_nc3000_Laplace0013_noleak_20240507.nc</bnd_topo>
+<!-- <bnd_topo hgrid="mpasa15"  phys="cam_dev" >atm/cam/topo/mpas/mpasa15_gmted2010_modis_bedmachine_nc3000_Laplace0013_noleak_20240507.nc</bnd_topo> -->
 <!-- Corresponds to cami_01-01-2000_00Z_mpasa120_L58_c230901.nc file -->
 <bnd_topo hgrid="mpasa120" nlev="58" >atm/cam/topo/mpasa120_gmted2010_modis_bedmachine_nc3000_Laplace0100_20220728.nc</bnd_topo>
-<bnd_topo hgrid="mpasa120" nlev="58" phys="cam_dev" >atm/cam/topo/mpas/mpasa120_gmted2010_modis_bedmachine_nc3000_Laplace0100_noleak_20240507.nc</bnd_topo>
+<!-- <bnd_topo hgrid="mpasa120" nlev="58" phys="cam_dev" >atm/cam/topo/mpas/mpasa120_gmted2010_modis_bedmachine_nc3000_Laplace0100_noleak_20240507.nc</bnd_topo> -->
 
 <!-- Scale Dry Air Mass: 0=> no scaling / +nnn=>scale to nnn Pressure  -->
 <scale_dry_air_mass                                                                >      0.0D0 </scale_dry_air_mass>
@@ -2314,6 +2314,8 @@
 <clubb_mf_nup                      > 10      </clubb_mf_nup>
 
 <!-- EarthWorks specific -->
+<!-- Turn off gravity wave frontogenesis -->
+<use_gw_front dyn="mpas" phys="cam_dev"> .false. </use_gw_front>
 <!-- Set radiation intervals based on mpas hgrids -->
 <iradlw hgrid="mpasa15"  > 10 </iradlw>
 <iradsw hgrid="mpasa15"  > 10 </iradsw>