next up previous contents
Next: Using CDFTOOLS for verification Up: Running NEMO on HECToR Previous: Creating a new set   Contents


Combining the output data

When NEMO executes, each processor writes out the particular part of the ocean on which it operated to a separate netCDF (.nc) file. In order to perform any analysis or verification of the output data these netCDF files must first be recombined into a single netCDF file on which the viewers (e.g. nemoplotnc, ncview etc) and diagnostic tools (e.g. CDFTOOLS) can operate. The nocscombine code can be used to perform this recombination. To recombine a series of netCDF 3.6.2 files using nocscombine the following command can be used:
  nocscombine -f O25-TST_CU30_19580101_19580101_grid_T_0000.nc -d votemper
The -f specifies the file series which is to be recombined, the -d specifies the particular field (e.g. temperature, salinity, velocity etc) that you wish to extract. If no -d is specified then the entire netCDF file will be recombined. The default output file name will be as given to the nocscombine tool with the processor number stripped away, e.g. O25-TST_CU30_19580101_19580101_grid_T.nc for the example above. If required, the output file can be altered with the -o flag. The options for nocscombine can be viewed with the nocscombine -h command.


next up previous contents
Next: Using CDFTOOLS for verification Up: Running NEMO on HECToR Previous: Creating a new set   Contents