OpenIFS

OpenIFS provides academic and research institutions with an easy-to-use version of the ECMWF IFS (Integrated Forecasting System). OpenIFS provides the forecast capability of IFS (no data assimilation), supporting software and documentation. OpenIFS has a support team at ECMWF for technical assistance but limited resources for detailed scientific assistance.

About OpenIFS provides more information about the model.

How to run openIFS:

First check openifs availability on your platform. Currently openIFS is available on UIO HPC (abel.uio.no) only.

module avail openifs

-------------------------------------------------------------------------------- /cluster/etc/modulefiles ---------------------------------------------------------------------------------
openifs/38r1v04(default)

If nothing is returned, it is likely openifs is not available. If you think it should, then contact us (drift@uio.no).

To load the default openifs version:

module load openifs

When loading openifs the following environment variables are defined:

• OIFS_CYCLE: ECMWF cycle such as 38r1 (version 38, revision 1)
• OIFS_HOME: directory where openIFS has been installed; this can be used to check openIFS sources
• OIFS_DATA: contains openIFS static input data. Even if you use your own compiled version of openIFS, it is NOT necessary to download these files again.
• OIFS_EXAMPLES: directory where all openIFS examples are stored. If you wish to run one of these examples see our dedicated section on running tutorials.
• OIFS_COMP: compilers used to create openIFS executables. We currently use intel compilers.
• OIFS_BUILD: type of build. It triggers a set of compiler options when building openIFS. Currently set to "opt"
• OIFS_GRIB_API_DIR: GRIB-API version used by openIFS to encode/decode GRIB files
• MARS_LSM_PATH: land sea mask used
• EMOS_VERSION: EMOS version (compiled with GRIB-API support). EMOS is used for interpolation routines.
• EMOS_HOME: directory where EMOS has been installed.
• BUFR_TABLES: bufrtables used for decoding/encoding BUFR (not used in the forecast model)
• CREX_TABLES: crex tables used for encoding/decoding CREX data.