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This page describes the required steps to use OpenIFS/AC "v2ac-rc" on the ECMWF HPCF.how OpenIFS/AC v1 (derived from OpenIFS 43r3v2) can be obtained, built and used for forecast experiments. The documentation shows examples of how to use the model on the ECMWF Bull Atos Sequana High-Performance Computing (HPC) system. Adjustments will need to be made for local installations. 

OpenIFS/AC compared to the standard OpenIFS model

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