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• You need to edit variables inside the file config.h to correspond with the chosen settings for your experiment before running the script to generate the initial data.

At first the following environment variables need to be set to the appropriate locations. In our example above in Section 2.3 these locations can be found under /data/openifs-ac: 

OIFS_ICMCL_DIR
This points to a directory containing initial conditions for the first day of all months of the year 2010 at Tl255L91. The ICMCL files contain boundary conditions (e.g. SSTs) for the entire month. 

OIFS_INIDATA_DIR_TM5

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This points to a directory containing initial conditions required for the 'tm5' chemistry

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(two versions for Tl255L91 are available: one with AER aerosol and one without) for 2010-01-01

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. It also contains boundary conditions (emission fluxes and deposition velocities) for 2010-01-01 to 2010-01-02.

OIFS_INIDATA_DIR_CBA
As above but for the 'bascoetm5' chemistry. 

• Further settings that need changing in config.h are described below in the following section.
• Once all the changes have been made in the configuration file, the prep script can be run. Running the prep script will take a few minutes and will result in new data which will be written to folder chem_ic. This folder serves as a staging area for the initial experiment data.

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• After the prep script has completed it's run,

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• the platform-specific job wrapper script can be executed to submit the model experiment job to the batch scheduler.

Example configuration settings for single forecast experiments

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