Prescribing SERIAL aerosol/solar in CAM6

[psalvi]

Hi, I'm trying to run CESM 2.1.2 - CAM6, in the F1850 compset with prescribed historical aerosol, with and without historical solar variations.
I'm trying to use the following options in the CAM namelist:

! evolving volcano
prescribed_strataero_cycle_yr = -999999
prescribed_strataero_datapath = '/glade/p/cesmdata/cseg/inputdata/atm/cam/ozone_strataero'
prescribed_strataero_file = 'ozone_strataero_WACCM_L70_zm5day_18500101-20150103_CMIP6ensAvg_c180923.nc'
prescribed_strataero_type = 'SERIAL'
prescribed_strataero_use_chemtrop = .true.

! evolving solar
solar_data_type = 'SERIAL'
solar_data_ymd = -99999999
solar_irrad_data_file = '/glade/p/cesmdata/cseg/inputdata/atm/cam/solar/SolarForcingCMIP6_18491230-22991231_c171031.nc'

But I'm running into a problem with each of the input datasets when I try to run the model.
In the case with both solar and volcanic forcing (piClim-histnat), it looks like I'm getting an issue from the solar input file:
input_data_utils::set_wghts_indices cannot not find model time in: {PATH}/inputdata/atm/cam/solar/SolarForcingCMIP6_18491230-22991231_c171031.nc

whereas if I apply only the aerosol dataset in the namelist ("piClim-histvolc"), I get:
FIND_TIMES: time: 0.000000000000000E+000
ERROR:
find_times: all(all_data_times(:) > time) ozone_strataero_WACCM_L70_zm5day_1850
0101-20150103_CMIP6ensAvg_c180923.nc
FIND_TIMES: ALL data times are after 0.000000000000000E+000
FIND_TIMES: file:
ozone_strataero_WACCM_L70_zm5day_18500101-20150103_CMIP6ensAvg_c180923.nc

These both seem to be issues with matching time in the model to time in the dataset. I noticed that the default input for these used "days since 0001" instead of "days since 1850", so I tried modifying the input but that doesn't seem to change the error.

Is there something obvious I should do to fix these errors?

 

[peverley]

Hi Pietro,

Are you still having this problem? If so, I would recommend taking a look at our default cam6 configurations in $CAM/bld/namelist_files/use_cases/ and seeing if any of those match what you're trying to do.

It looks like the FHIST compset (which will use hist_cam6.xml) will use SERIAL time interpolation for solar and strataero files, so you may want to use a FHIST compset instead of an F1850 compset. The F1850 compset defaults can be found in 1850_cam6.xml.

Hope that helps.
Courtney

 

[psalvi]

Hi Courtney,

Thanks for the suggestion! This has ended up on the backburner, unresolved, so fingers crossed I can fix this using the steps you've outlined.
I'll post any updates here.

Cheers,
-Pietro