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changes.mady.by.user Emilio Echevarria

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changes.mady.by.user Jorge Perez

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Comment: NZMS model change

Table of Contents

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title11-01-2023 NZMS upgrade

Resolution changed to 0.1 degrees. The fix has been applied since 12Z, 11-01-2023 run.

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title04-08-2022 BoM upgrade

A new single model configuration (AUSWAVE-G3) will replace the legacy global (AUSWAVE-G) and regional (AUSWAVE-R) systems since   

Features of this upgrade include:

  • Incorporating the latest version of Wavewatch III® (WW3) - version 6.0.7;
  • Spherical Multiple Cell Grid with two tier refinement
    • 12km and 6km at low latitudes, and
    • 25km and 12km at high latitudes beyond 55oN and 55oS in the zonal (east-west) direction, 12km and 6km remain in the meridional (northsouth) direction);
  • An increase in spectral resolution from 24 directions and 25 frequency bins to 30 directions and 28 frequency bins;
  • Interpolation from SMC grids to regular grids at 12.5km for the global domain and 6.25km for the Australian domain;
  • Newly the runs at 6 and 18 UTC are provided too but with shorter forecast length (up to +156 hours);

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title23-03-2021 NCEP upgrade
  • Model Name and version: GFS-Wave, WAVEWATCH III v6.07
  • Resolution changed to 0.25 degrees
  • Lead time length changed to +384h
    • Step frequency: 1 (0:120), 3 (123:384)

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NZMS

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title11-01-2023 NZMS upgrade

Resolution changed to 0.1 degrees. The change has been applied since 12Z, 11-01-2023 run.

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title11-06-2021 NZMS technical change

NZMS data after the upgrade on 14-09-2020 contained grid with 1441 longitude points from 0 to 359.9 degrees instead of the intended 1440 points from 0 to 359.75 degrees corresponding exactly to  0.25 degrees resolution. The extra grid point made the resolution slightly less than 0.25. The fix has been applied since 0Z, 11-06-2021 run.


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title14-09-2020 NZMS upgrade
  • Resolution changed to 0.25 degrees 
  • Lead time length changed to +168h

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