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Examine the files in the oifs38r1 directory if you are unfamiliar with the OpenIFS model. |
Directory: scratch
This is the directory in which we will run OpenIFS.
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For this exercise, to save computer time, each participant will run a single, different 'ensemble member' and we will create the complete forecast ensemble from the individual ensembles run by the class as a whole. A later exercise will show how to do this from the model output GRIB files.
The first exercises show how to create the experiment directories, prepare the jobs and submit them to the ECMWF Cray.
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createENS --help
usage: createENS [-h] -d <startdate/enddate/hr_inc> [-m <members>]
Set up ensemble forecast for the OpenIFS 2015 workshop
optional arguments:
-h, --help show this help message and exit
-d <startdate/enddate/hr_inc>, --date <startdate/enddate/hr_inc>
List of date(s) to retrieve, format: YYYYMMDDHH. The
only dates available are: 2013102400/2013102700/24
-m <members>, --members <members>
Number of ensemble members to create e.g. 3 (default 1) |
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Please only use the 2013102400 start date to ensure we can create the single from everyone's runs. Decide which of the available dates to use. Use the createENS command to create an ensemble with just a single member. |
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Change to the experiment directory labelled by the date chosen:
There are two experiment directories: cf000 and pf001. cf000 is for the control forecast which is not used here. pf001 is the single perturbation forecast.
Understand what the different files in the experiment directory are for. ICM* : these are the initial starting files. ICMGG* are the initial gridpoint files, ICMSH* are the initial spectral fields. Use the 'grib_ls' command to examine the initial files:
The file: namelistfc is the model 'NAMELIST'. It contains a list of variable settings or 'switches' that control what the model does. These variables are grouped into separate fortran namelists. |
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