Changes between Version 15 and Version 16 of ImplementationConceptOffline

Timestamp:

May 17, 2025, 12:00:46 PM (23 hours ago)

Author:

lnerger

Comment:

--

ImplementationConceptOffline

@@ -30 +30 @@
  * At the beginning of the program, the subroutine `init_parallel_pdaf` is executed. This subroutine creates the parallel environment for PDAF. In the offline mode, it is possible to execute the assimilation program on a single processor, even if the model is parallelized. With local filter methods, one can also use OpenMP (shared memory) parallelization.
  * Subsequently, a routine `init_pdaf` is executed. In this routine, parameters for PDAF can be defined and then the core initialization routine `PDAF_init` is called. This core routine also initializes the array of ensemble states. In case of the offline mode, this means that the ensemble is read from the output files of the model.
- * Finally, the routine `assimilation_pdaf` is called. In this routine, the names of the user-supplied routines are declared and than the PDAF core routine `PDAF3_assim_offline` is executed (With PDAF before version 3.0, a routine `PDAFomi_put_state_X` is used (where X is replaced by the specific type of DA method, e..g X=`local`). For the offline mode there is no ensemble integration in the assimilation program. Thus, this subroutine directly computes the analysis step (i.e. the actual assimilation of the observations). In a user-supplied subroutine called by `PDAF3_assim_offline`, the ensemble of analysis states is finally written into restart files for the next forecast phase conducted by direct model integrations initialized from these files.
+ * Finally, the routine `assimilation_pdaf` is called. In this routine, the names of the user-supplied routines are declared and than the PDAF core routine `PDAF3_assim_offline` for the assimilation is executed (With PDAF before version 3.0, a routine `PDAFomi_put_state_X` is used, where X is replaced by the specific type of DA method, e..g X=`local`). For the offline mode there is no ensemble integration in the assimilation program. Thus, this subroutine directly computes the analysis step (i.e. the actual assimilation of the observations). In a user-supplied subroutine called by `PDAF3_assim_offline`, the ensemble of analysis states is finally written into restart files for the next forecast phase conducted by direct model integrations initialized from these files.
 
 == Important aspects of the implementation concept ==