Changes between Version 6 and Version 7 of 2019WP/ENHANCE-05_SimonM-Harmonic_Analysis


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Timestamp:
2019-08-23T19:46:28+02:00 (13 months ago)
Author:
smueller
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  • 2019WP/ENHANCE-05_SimonM-Harmonic_Analysis

    v6 v7  
    2121== Preview  
    2222 
    23 {{{#!box help 
    24 [[Include(wiki:Developers/DevProcess#preview_)]] 
    25 }}} 
     23=== Current implementation of tidal harmonic-analysis diagnostics and available enhancements 
     24 
     25Tidal harmonic analysis of model fields based on multiple linear least-squares regression is available in the current trunk version of NEMO in module `diaharm` (source:/NEMO/trunk/src/OCE/DIA/diaharm.F90@10835). It is restricted to the analysis of sea-surface height and barotropic velocity fields, to a hard-coded maximum number of time slices within uninterrupted model runs, and its memory footprint during the whole analysis period can be very large. The current implementation has aspects that are deprecated (use of a pre-processor key, non-conventional namelist variable names, and statical allocation of potentially oversized arrays) and appears to be computationally inefficient. Further, it lacks sought-after features, such as the analysis of a wider range of model fields (including three-dimensional fields) and the possibility to span the analysis time period across restarted model runs, which have become available in more efficient alternative implementations of the same analysis method by N. Bruneau (pers. comm.) and E. O'Dea (https://forge.ipsl.jussieu.fr/nemo/browser/branches/UKMO/dev_5518_tid_analysis_restart) in previous NEMO versions. In addition, the harmonic analysis diagnostics of module `diaharm` remains deactivated, and thus its compilability untested, during the standard tests of the SETTE test suite. 
    2626 
    2727== Tests