Changes between Initial Version and Version 1 of PDAFomi_put_state_en3dvar_estkf_nondiagR


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Timestamp:
Sep 8, 2024, 4:14:24 PM (2 months ago)
Author:
lnerger
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  • PDAFomi_put_state_en3dvar_estkf_nondiagR

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     1= PDAFomi_put_state_en3dvar_estkf_nondiagR =
     2
     3This page documents the routine `PDAFomi_put_state_en3dvar_estkf` of PDAF which is used in case of a non-diagonal observation error covariance matrix. This routine was introduced with PDAF V2.3.
     4
     5The routine is typically called in `assimilate_pdaf` or directly in the model code.
     6
     7The routines `PDAF_put_state_*` are used with the 'flexible' implementation variant of PDAF.
     8The general aspects of the filter specific routines `PDAF_put_state_*` are described on the page [ModifyModelforEnsembleIntegration Modification of the model code for the ensemble integration] and its sub-page on [InsertAnalysisStep inserting the analysis step]. For the 'fully parallel' implementation variant the alternative routines `PDAF_assimilate_*` are used.
     9
     10
     11The interface is:
     12{{{
     13SUBROUTINE PDAFomi_put_state_en3dvar_estkf(U_collect_state, &
     14                                 U_init_dim_obs_pdafomi, U_obs_op_pdafomi, U_prodRinvA_pdafomi, &
     15                                 U_cvt_ens, U_cvt_adj_ens, U_obs_op_lin_pdafomi, U_obs_op_adj_pdafomi, &
     16                                 U_prepoststep, outflag)
     17}}}
     18with the following arguments:
     19 * `U_collect_state`: The name of the user-supplied routine that initializes a state vector from the array holding the ensemble of model states from the model fields. This is basically the inverse operation to `U_distribute_state` used in `PDAF_get_state` as well as here.
     20 * `U_init_dim_obs_pdafomi`: The name of the user-supplied routine that initializes the observation information and provides the size of observation vector
     21 * `U_obs_op_pdafomi`: The name of the user-supplied routine that acts as the observation operator on some state vector
     22 * `U_cvt_ens`: The name of the user-supplied routine that applies the ensemble control-vector transformation (square-root of the B-matrix) on some control vector to obtain a state vector.
     23 * `U_cvt_adj_ens`: The name of the user-supplied routine that applies the adjoint ensemble control-vector transformation (with square-root of the B-matrix) on some state vector to obtain the control vector.
     24 * `U_obs_op_lin_pdafomi`: The name of the user-supplied routine that acts as the linearized observation operator on some state vector
     25 * `U_prodRinvA_pdafomi`: The name of the user-supplied routine that computes the product of the inverse of the observation error covariance matrix with some matrix provided to the routine by PDAF.
     26 * `U_obs_op_lin_pdafomi`: The name of the user-supplied routine that acts as the adjoint observation operator on some state vector
     27 * `U_prepoststep`: The name of the pre/poststep routine as in `PDAF_get_state`
     28 * `status`: The integer status flag. It is zero, if the routine is exited without errors.
     29
     30
     31The user-supplied call-back routines are described on the page on [wiki:ImplementAnalysis_3DEnVar implementing the analysis step of 3D Ensemble Var with OMI].
     32
     33It 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.
     34