Aquaplanets with slab ocean (by Brian Medeiros 2013)

[valeriarudloff@gmail_com]

Hello, i'm working on an Aquaplanet with slab ocean, and i'm following the instructions of Madeiros (http://www.cesm.ucar.edu/models/simpler-models/aquaplanet.html).Everything has been well documented until i started to work with the inputdata related to qfluxes, SST and depth ocean. That file (tipically for D and E compset, named as pop_frac.1x1d.090130.nc) has those variables, but normally that information is written for a different grid... i mean, for a grid different to f19_f19, which one is used in the Madeiros's Instructions. May i create the file, using the same grid size of other input files that have been changed (particularly, domain.ocn.1.9x2.5_gx1v6_090403.nc)?

Is there someone else who create this file?  Regards

 

[brianpm]

This is an old question, but I wanted to let people know that the released CESM2 has a standard aquaplanet with slab-ocean. It can be run using the compsets called:QSC4, QSC5, QSC6where the number indicates the CAM physics version.  The files that are needed for the slab-ocean file are a domain file and a forcing file. Examples can be seen in the CESM inputdata:

forcing: /glade/p/cesmdata/cseg/inputdata/ocn/docn7/SOM/default.som.forcing.aquaplanet.Qflux0_h30_sstQOBS.1degFV_c20170421.ncdomain: /glade/p/cesmdata/cseg/inputdata/share/domains/domain.ocn.fv0.9x1.25_gx1v7.151020.ncBut specifying the domain file is no longer necessary in CESM2 if running the compsets listed above.

 

[mpb20@st-andrews_ac_uk]

Hi all, I'm working on getting a slab-ocean aquaplanet version of cesm1_2_2 (CAM4) running on the UK's ARCHER supercomputer, following Brian Medeiros' instructions (http://www.cesm.ucar.edu/models/simpler-models/files/CAM_aqua_som_description.pdf).The model compiles ok but I get a runtime error related to initialising the solar radiation calculation:(GETFIL): attempting to find local file abs_ems_factors_fastvx.c030508.nc
(GETFIL): using /work/ecse0116/shared/CESM1.0/inputdata/atm/cam/rad/abs_ems_factors_fastvx.c030508.nc
(shr_sys_abort) ERROR: rad_solar_var_init: solar input file must have reference irradiance spectrum
(shr_sys_abort) WARNING: calling shr_mpi_abort() and stopping The input file (abs_ems_factors_fastvx.c030508.nc) does exist at the specified location, but doesn't seem to contain "reference irradiance spectrum" data. Should rad_solar_var.F90 even be called for this simple perpetual equinox case? Any suggestions would be gratefully received, the ATM ans CESM log files are attached.Cheers,Mike 

 

[mpb20@st-andrews_ac_uk]

Update: The model is looking for "reference irradiance spectrum" data in the solar input file, which in my case is ape_solar_ave_tsi_1365.nc. However this input file is based on the Aqua-Planet Experiment design, and does not include a reference irradiance spectrum. Has anyone running aquaplanets encountered this issue?

 

[brianpm]

Hi Mike,I haven't hit that error, but I have run CAM4 aquaplanets with ape_solar_ave_tsi_1365.nc many times. I suspect that some logic has been triggered that isn't usually. I just set up a fixed-SST CAM4 aquaplanet following the instructions at http://www.cesm.ucar.edu/models/simpler-models/fixed_sst_aqua.html#cam4In my atm_in namelist, I see:

absems_data  = '/glade/p/cesmdata/cseg/inputdata/atm/cam/rad/abs_ems_factors_fastvx.c030508.nc'

and also:

radiation_scheme = 'camrt'

solar_const = 1365.0

solar_htng_spctrl_scl = .false.

Is your run also setting these values? 

 

[mpb20@st-andrews_ac_uk]

Thanks Brian for the help! Comparing to your fixed-SST CAM4 case, in my atm_in file I have the same absems_data input file specified:absems_data = '/work/ecse0116/shared/CESM1.0/inputdata/atm/cam/rad/abs_ems_factors_fastvx.c030508.nc'But the solar_const is not specified, and in solar_inparm I have:&solar_inparm  solar_data_file                = '/work/ecse0116/shared/CESM1.0/inputdata/atm/cam/solar/ape_solar_ave_tsi_1365.nc'  solar_htng_spctrl_scl          = .true./So for some reason in the CAM4 slab aquaplanet setup that I have tried, the solar radiation is not being setup correctly. I based my build on your notes for a CAM5 slab-ocean aquaplanet (http://www.cesm.ucar.edu/models/simpler-models/files/CAM_aqua_som_description.pdf), so maybe it's a CAM4/5 issue? One idea would be to invoke the aquaplanet use case when I build, though your notes suggests this creates other issues when setting up the SOM