Cycle 31r2 summary of changes

Cycle 31r2 is a consolidation cycle.

Implementation date 12 December 2006  
Key characteristics of our current forecasting system  

Horizontal  (unchanged)

  • Atmospheric
    • HRES: TL799
    • ENS: TL399
  • Wave
    • HRES: 0.36 degrees
    • ENS: 0.5 degrees
    • LAW: 0.1 degrees

Vertical (unchanged)

  • Atmospheric
    • HRES: L91
    • ENS: L62


Data set affected
  • HRES
  • ENS
Meteorological changes
  • passive monitoring of new data
Meteorological impacts
  • small impact in the troposphere
  • significant positive impact for lower stratospheric temperature analyses and forecasts
Technical changes
  •  introduction the use of new satellite data
  • GPS radio occultation data from CHAMP, GRACE and COSMIC.
  • changes are related to the data representation of ENS fields in the MARS archive.
    • Ensemble mean and standard deviation fields are archived in MARS with 16 bit accuracy
    • Probability forecast fields are stored in MARS with 8 bit accuracy
Model ID
  • Atmospheric: 128
  • Ocean wave: 116
New disseminated model output -  
Discontinued disseminated model output -  
e-suite experiment number 0032