| | 3 | The online mode offers two implementation variants. The first one, called 'fully-parallel', assumes that you have a sufficient number of processes when running the data assimilation program so that all ensemble states can be propagated concurrently. The parallelism allows for a simplified implementation. The second implementation variant, called 'flexible', allows to run the assimilation program in a way so that a model task (set of processors running one model integration) can propagate several ensemble states successively. This implementation variant is a bit more complicated, because one has to ensure that the model can jump back in time. |
