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Table of Contents
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2023

Info
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title19-02-2023 Major JMA system change

The JMA model has been changed from GEPS to CPS coupled to an ocean model since the 19th February 2023  with the main changes related to S2S outputs:

  • General changes:
    • output frequency for 10 metre wind and precipitation changed from 24 to 6-hourly
    • increased number of vertical layers for  vertical velocity
    • surface thermal radiation downwards parameter newly provided
  • Real-time forecasts changes:
    • ensemble size decreased from 25 to 5
    • frequency changed from twice a week (every Tuesday and Wednesday at 12Z) to every day (0Z)
  • Reforecasts changes (the new corresponding fixed reforecast set with model version date 30/09/2022 will be added in the near future):
    • ensemble size decreased from 13 to 5
    • the start dates changes as per JMA Model#CPS3

More information can be found in:


Info
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title17-01-2023 RHMC system change

The RHMC model has been upgraded to the new version since the 15th September 2022  with the main changes related to S2S outputs:

  • resolution increased from 1.1x1.4 L28 to 0.9x0.72 L96 
  • eps size of the real-time data increased from 20 to 41
  • forecast length decreased from d 0-61 to d 0-46
  • eps size of the on-the-fly reforecasts increased from 10 to 11
  • reforecast period changed from 1990-2015 to 1991-2015
  • added 6-hourly 10u/v parameters 
  • added 10 hPa pressure level parameters

More information can be found in HMCR Model.

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