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IBM compiler. Although configuration files are provided for the IBM compiler, we can not test it at ECMWF and welcome any corrections from users.

The Known Issues page has more information about potential problems with the OpenIFS code.

New evaluation package and test-data

A new evaluation package has been added to OpenIFS that allows the user to verify the meteorological performance of their model version against the same case studies run at ECMWF. This includes a new test-data download site (see below), with a step-by-step guide on how to download the initial files, ECMWF reanalyses for comparison and a gallery of the forecasts performed at ECMWF. The OpenIFS team will use these case studies with each new release to catalogue the changes in model releases. This evaluation suite will also be useful in analysing contributions from users. A more extensive evaluation suite is used at ECMWF to assess changes for the operational IFS but this is too complex to be run outside ECMWF.

For more information

See OpenIFS User Guide : Meteorological Evaluation

After introduction of the two cases, this section guides the user step by step through running the selected experiments, post-processing the model outputs, downloading the reference (ERA-Interim and ERA5) data and visualising the model outputs with Metview. A catalogue from the prepared figures is also included. The input data and the namelists needed for the model runs, the scripts for the MARS retrieves of the re-analyses, the Metview macros for visualization and the output figures are available for download on the ECMWF download server.

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