Changes between Version 8 and Version 9 of PDAF3_assimilate_local


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Timestamp:
Apr 20, 2025, 6:16:16 PM (7 days ago)
Author:
lnerger
Comment:

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  • PDAF3_assimilate_local

    v8 v9  
    33This page documents the routine `PDAF3_assimilate_local`. The routine is part of the advanced [wiki:PDAF3_interface PDAF3 interface] that was introduced with PDAF V3.0. 
    44
    5 The routine is used to execute the analysis step of all local ensemble filters including the nonlinear filter LNETF, the hybrid filter LKNETF, and the ENSRF/EAKF (but except the [wiki:ImplementAnalysislenkfOmi LEnKF]). The routine uses the functionalities provided by PDAF-OMI and PDAFlocal to yield a minimum number of arguments.
     5The routine is used to execute the analysis step of all local ensemble filters including the nonlinear filter LNETF, the hybrid filter LKNETF, and the ENSRF/EAKF (but except the [wiki:ImplementAnalysislenkfOmi LEnKF]). The routine uses the functionalities provided by PDAF-OMIto yield a small number of arguments. For backward-compatibility, the routine does not use PDAFlocal, but lets the user provide the routines for filling the local state vector and to fill the global analysis state vectors with the local analysis states.
    66
    77The routine is typically called in `assimilate_pdaf` or directly in the model code.
    … …  
    1616             U_init_dim_obs_pdafomi, U_obs_op_pdafomi, &
    1717             U_init_n_domains, U_init_dim_l, U_init_dim_obs_l_pdafomi, &
     18             U_g2l_state, U_l2g_state, &
    1819             U_prepoststep, U_next_observation, status)
    1920}}}
    … …  
    2627 * `U_init_dim_l`: [[BR]]The name of the user-supplied routine that provides the state dimension for a local analysis domain
    2728 * `U_init_dim_obs_l_pdafomi`: [[BR]]The name of the user-supplied routine that initializes the size of the observation vector for a local analysis domain. This routine is part of an OMI observation module.
     29 * `U_g2l_state`: The name of the routine that initializes a local state vector from the global state vector
     30 * `U_l2g_state`: The name of the routine that initializes the corresponding part of the global state vector from the provided local state vector
    2831 * `U_prepoststep`: [[BR]]The name of the user-supplied pre/poststep routine as in `PDAF_get_state`
    2932 * `U_next_observation`: [[BR]]The name of the user-supplied routine that initializes the variables `nsteps`, `timenow`, and `doexit`. The same routine is also used in `PDAF_get_state`.
    … …  
    3134
    3235**Notes:**
    33  * The routine is identical to the routine `PDAFlocalomi_assimilate` of PDAF 2.3, except that the argument `U_prepostep` is at a different place here.
     36 * The routine is identical to the routine `PDAFomi_assimilate` of PDAF 2.3, except that the argument `U_prepostep` is at a different place here.
    3437 * The order of the routine names does not show the order in which these routines are executed. See the [ImplementAnalysisLocal#Executionorderofuser-suppliedroutines section on the order of the execution] on the page on implementing the analysis step of the local filter algorithms.
    3538 * To use the localization in the ENSRF/EAKF, one needs to call [wiki:PDAFomi_set_localize_covar] in the observation modules to initialize the localization information.
     39 * It is recommended to check the value of `status_pdaf` in the program after the routine is executed. Only if its value is 0 the initialization was successful.
    3640
    3741The user-supplied call-back routines are described on the page on [ImplementAnalysisLocal implementing the analysis step of the local filters].
    3842
    39 It is recommended that the value of `status_pdaf` is checked in the program after the routine is executed. Only if its value is 0 the initialization was successful.