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License
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See: Install OpenIFS for more details on how to download and install OpenIFS.
Please note that a license issued by ECMWF is required before OpenIFS can be downloaded.
OpenIFS is free but requires a license to be signed by the user before access to the model code is provided. See Licensing for more details.
New users are usually asked to send a short expression of interest to
Release: v01. Known Issues
Pressure level output. A bug in this version prevents the model from writing GRIB output on anything other than model levels. This is fixed in the next release. For advice on how to fix this bug please contact: openifs-support@ecmwf.int.
OpenMP: some compiler versions (intel and some gfortran versions) are known to produce SEGV if OpenMP is enabled in optimized compilation. This will be fixed in a future release. In the meantime, we recommend that if you find this occurs, remove OpenMP options from the compilation and only use MPI.
Intel compiler. We recommend using -O1 and no higher for the intel compiler. At high optimization levels (-O2), the intel compiler causes SEGV when executing on processors that support the SSE4.1 and AVX instruction sets (Harpertown & Sandybridge CPUs). The FCM configuration files for the Intel compiler use a default of -O1 for the optimized build.
Bit reproducibility: The Intel MKL library is known to cause non-reproducible results. If this is an issue a code wrapper can be applied.
Release distributions
OpenIFS is available as tarfiles from the ECMWF ftp site. This is currently password protected. Users are provided with the password when the license has been duely signed.
OpenIFS is also available as a Git repository for selected developers and users. For more details For more details, or assistance, please contact: openifs-support@ecmwf.int.
Download
For instructions on downloading and installing OpenIFS please see: Install OpenIFS.
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