Cycle 31r2 is a consolidation cycle. This cycle introduces the assimilation of new satellite data: winds from MTSAT (Japanese GEO satellite), and GPS radio occultation data from CHAMP, GRACE and COSMIC.
Implemented: 12 December 2006
Datasets affected
HRES
ENS
Resolution
Unchanged
Horizontal
Vertical
Atmospheric (unchanged)
HRES: TL799
ENS: TL399
Wave (unchanged)
HRES: 0.36 degrees
ENS: 0.5 degrees
LAW: 0.1 degrees
Atmospheric (unchanged)
HRES: L91
ENS: L62
Meteorological content
passive monitoring of new data
Meteorological impact
small impact in the troposphere
significant positive impact for lower stratospheric temperature analyses and forecasts
Technical content
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