Restarting an Atmos-Ocean Integration
From UKCA
Restarting an Atmosphere Ocean Integration
UKCA is running in the QESM-AO configuration, which includes the NEMO ocean and CICE sea-ice models, using the ORCA2 grid. While restarting an atmospheric-only model has been described elsewhere on this site, restarting both NEMO and CICE add extra complications. The following description is for MONSooN, although the equivalent steps would need to be done on HECToR also.
NOTE: These instructions are designed to describe how to restart an already running QESM-AO job (as a new job).
1. Pick your restart date
You will need to check the date in your UM dump, and select the NEMO and CICE dumps accordingly, e.g.:
- UM dump is
xfxfha.dac5510, model date is 2285/05/01:00 / 44790.000000 - i.e. midnight on the first day of the month. - The corresponding NEMO restart files are in fact
xfxfho_22850430_restart_0000.nc, xfxfho_22850430_restart_0001.nc,andxfxfho_22850430_restart_0002.nc, when running the ocean over 3 processors - i.e. NEMO dumps are midnight on the 30th (last day) of the month. - The corresponding CICE restart file is
xfxfhi.restart.2285-05-01-00000- i.e. midnight on the first day of the month, the same as the UM.
2. UM restart
- Copy your selected UM dump (e.g.
xfxfha.dac5510) above to another directory. You may already have aSTARTDUMPSdirectory defined in the UMUI, and may wish to copy it there. - Go to Start dump:
Model Selection -> Atmosphere -> Ancillary and input data files -> Start Dump
You will need to alter the directory path and name of file to point to the start-dump you are interested in. You must then turn off the radio button Using the reconfiguation and make sure that the start-date (listed at the top of this panel) matches that in the dump file.
