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Code and configuration
OpenIFS is a version of the full IFS (Integrated Forecast System) code. OpenIFS is based on Cycle 38R1, the operational model introduced in December 2012 (it has since been superceded for operations)
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Although the IFS can be run in a number of configurations, OpenIFS only supports forecast mode (NCONF=1).
Scientific capability
OpenIFS essentially includes the forecasting capability of IFS but without any data assimilation. OpenIFS & IFS are the same with respect to:
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- 4D-Var and any observation handling.
- Non-hydrostatic dynamics.
- Adjoint / tangent-linear versions.
- Ocean model.
- Wave model.
- Ability to output Arpege file formats, only GRIB output is supported.
Support
Only operational configurations of IFS at ECMWF will be supported and for which documentation is available. Although we may endeavour to provide help on non-standard or untested configurations we cannot provide direct support for them.
Acknowledgements
The dynamical core IPR is shared with MeteoFrance and collaborators. The IPR of the 'fullpos' and 'ddh' packages in OpenIFS are acknowledged as held by MeteoFrance and we thank our colleagues for permission to include it in OpenIFS.
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