"Lagrangian levels are crossing" when disable the use_topo_file

[jray]

Hi All,

I am setting up a simpler model by using VisualCaseGen (following the instructions provided here: VisualCaseGen: Ridge World | Community Earth System Model).
The ridge world experiment can run successfully on derecho.
./cesm2_3_beta17_gui/cime/scripts/create_newcase --compset 1850_CAM40_CLM45%SP_CICE_MOM6_SROF_SGLC_SWAV --res fullridge --case ridge_world --machine derecho

Problem:
The original setup of the model uses real topography:
use_topo_file = .true.
bnd_topo = '/glade/campaign/cesm/cesmdata/inputdata/atm/cam/topo/fv_0.9x1.25_nc3000_Nsw042_Nrs008_Co060_Fi001_ZR_sgh30_24km_GRNL_c170103.nc'
ncdata = '/glade/campaign/cesm/cesmdata/inputdata/atm/cam/inic/fv/cami_1987-01-01_0.9x1.25_L26_c060703.nc'
This setup doesn’t match the intended "a narrow land ridge" configuration.

However, when I disabled the topo file with:
use_topo_file = .false.
ncdata = '/glade/p/cesmdata/cseg/inputdata/atm/cam/inic/fv/aqua_0006-01-01_0.9x1.25_L26_c161020.nc'
I encounter the following error:
"Lagrangian levels are crossing 9.9999999E-012 Run will ABORT!"

I’ve tried increasing nspltvrm, nsplit, and nspltrac, but this error persists.
Has anyone encountered this issue or have suggestions on how to resolve it? Any help would be much appreciated!

Thanks

 

[mlague]

@jray did you solve this? I'm running into a similar issue when trying to use a modified topography file.

 

[islas]

I wonder if you could try starting from a different analytical atmospheric initial condition. There is a similar suggestion from Brian in this forum post How to introduce water mountains in Aquaplanet CESM CAM 6?. In short, I think you would do this in the CAM namelist

analytic_ic_type='us_standard_atmosphere'

and make this xml change

./xmlchange --append CAM_CONFIG_OPTS=-analytic_ic

Sorry, I didn't see this original posting from a long time ago.