Changes between Version 4 and Version 5 of PDAF_diag_variance


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Timestamp:
Mar 26, 2025, 2:25:08 PM (6 days ago)
Author:
lnerger
Comment:

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  • PDAF_diag_variance

    v4 v5  
    2929 * The ensemble standard deviation is a common measure of the estimate model root mean square error. It is typically computed in `prepoststep_pdaf` to monitor the assimilation process.
    3030 * The option `do_mean` exists mainly for performance reasons. If `state_p` contains is ensmeble mean state it does not need to be computed again.
    31  * The routine compute the unbiased variance, i.e. the normalization is 1/(dim_ens-1)
     31 * The option `do_stddev` also exists for performance reasons. If one is not interested in this number, it does not need to be computed.
     32 * The routine computes the unbiased variance, i.e. the normalization is 1/(dim_ens-1)
     33 * The MPI operations are only done in the communicator `COMM_filter` which is specified as an argument. This allows to also use the routine if PDAF was not initialized by calling `PDAF_init`.