Changes between Version 19 and Version 20 of GeneralImplementationConcept


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Timestamp:
Oct 8, 2013, 8:47:22 PM (5 years ago)
Author:
lnerger
Comment:

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  • GeneralImplementationConcept

    v19 v20  
    3232
    3333There are two possibilities to build a data assimilation system
    34  1. '''Online mode:''' [[BR]] The model code is extended by calls to PDAF core routines. A single executable is compiled. While running this single executable the necessary ensemble integrations and the actual assimilation is performed.
    35  1. '''Offline mode:''' [[BR]] The model is executed separately from the assimilation/filter program. Output files from the model are used as inputs for the assimilation program.
     34 1. '''Online mode:''' [[BR]] The model code is extended by calls to PDAF core routines. A single executable is compiled. While running this single executable the necessary ensemble integrations and the actual assimilation are performed.
     35 1. '''Offline mode:''' [[BR]] The model is executed separately from the assimilation/filter program. Output files from the model are used as inputs for the assimilation program, which writes restart files for the model after computing the analysis step.
    3636PDAF supports both the online and offline modes. Generally, we recommend to use the online mode because it is more efficient on parallel computers. However, the required coding is simpler for the offline than the online mode.
    3737