SST: how to update input dataset?


Copy SST file to your case directory:
On Abel: 
export EXPNAME=SST
cd ~/cesm_case/f2000.T31T31.$EXPNAME

cp /work/users/$USER/inputdata/atm/cam/sst/sst_HadOIBl_bc_48x96_clim_c050526.nc .


To change SST (+8K), use nco utilities to edit values on the file.
We will use a function called ncap2 – (netCDF Arithmetic Averager) single line command below:

On Abel: 

module load nco

ncap2 -O -s 'lat2d[lat,lon]=lat ; lon2d[lat,lon]=lon' -s 'omask=(lat2d >= -5.0 && lat2d <= 5.0) && (lon2d >=180.0 && lon2d <= 275.0)' -s 'SST_cpl=(SST_cpl + 8.0*omask)' sst_HadOIBl_bc_48x96_clim_c050526.nc sst_HadOIBl_bc_48x96_clim_$EXPNAME.nc
Process env_run.xml to make namelist changes effective (create namelist files) 
./preview_namelists
Copy changed SST data file to run directory 
cp sst_HadOIBl_bc_48x96_clim_SST.nc /work/users/$USER/f2000.T31T31.$EXPNAME/run/.

Before submitting your experiment, make sure you adjust the wall clock time! Now you are ready to submit your simulation:
On Abel: 
cd ~/cesm_case/f2000.T31T31.$EXPNAME

./f2000.T31T31.$EXPNAME.submit

Once your short simulation is done, check the outputs: were your changes taken into account? Do you get significant results?
If you are happy with your short run, you can setup your long run (14 months) experiment.