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• ecmwf-hpc2020.job.tmpl    –    run oifs without XIOS
• oifs-config.ecmwf-hpc2020.sh  –  template for the machine config file

The /prep-ic-icmcl-compo.sh/ script prepares the Initial Conditions,
  the climatology, and the atmospheric composition fluxes before you run
  OIFS. The main purpose is to create or copy three sets of files (IC,
  ICMCL and ICMCL-COMPO) needed to run an experiment. Paths to find
  those files are set in the /config.h/. See the section DATASETS in
  that file for details. Note that it is possible to use different data
  than those provide to test OpenIFS/AC but keep in mind this requires
  access to MARS archives at ECMWF.
  ┌────
  │  Usage:
  │         prep-ic-icmcl-compo.sh  START_DATE  END_DATE
  │
  │  Setup or create in $AC_IC_DIR:
  │
  │    - Initial Conditions for START_DATE (if not continuing/restarting a run)
  │         ICs are looked for in $OIFS_INIDATA_DIR. If not found, they are created.
  │
  │    - ICMCL climatology file for START_DATE to END_DATE.
  │         If $ICMCLDIR dir is set (in config.h), the ICMCL file is linked
  │         from $ICMCLDIR/ICMCL-yyyymm0100
  │         (Note: can contain data for dates before or after those required)
  │
  │    - ICMCL-COMPO (Emissions and Depositions) for START_DATE to END_DATE.
  │         ICMCL-COMPO are looked for in $OIFS_INIDATA_DIR. If not found, it is created.
  │
  │         (If \$AC_IC_DIR/ICMCL-INIT-COMPO-... exists, it will not be
  │         created again. This allows for faster re-run when developing.)
  │
  │  START_DATE, END_DATE:
  │    - Must be in a format understood by 'date -d' (eg 2010-12-15)
  │
  └────

  Note that:

  • If prepared beforehand, ICMCL and ICMCL-COMPO can contain data for dates
    before or after those requested, but filename formats expected BY THIS
    SCRIPT are:
    = ICMCL       : ICMCL-yyyymm0100
    = ICMCL-COMPO : ICMCL-INIT-COMPO or ICMCL-INIT-COMPO-START_DATE-END_DATE (with dates in YYYYMMDDhh)

  • $OIFS_INIDATA_DIR, $ICMCLDIR and $AC_IC_DIR are set in /config.h/

 Generating initial data overview

Initial conditions for the standard OpenIFS model can be generated using the OpenIFS Data Hub or alternatively they can be requested from the ECMWF OpenIFS support by email openifs-support@ecmwf.int. This provides initial experiment data and surface boundary conditions for the physical/meteorological NWP forecast model.

In order to simulate atmospheric composition further initial and boundary conditions are needed. These can be created using the prep-ic-icmcl-compo.sh script. 

• 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.

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