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         MISSION / VISION    |    About EMC

EMC > GLOBAL BRANCH > GFS > IMPLEMENTATIONS
GLOBAL FORECAST SYSTEM

Upcoming Implementations:


Date

Title

Q15FY15 GSM v12.0.0 - implementation scheduled for December 9th, 2014 (subject to change)

Please note: GSM (Global Spectral Model) refers to the forecast component of the larger GFS (Global Forecast System). As the GFS/GSM begins its transition to NEMS/GSM, the terminology will shift as well. See Q1FY16 upgrade for more details on transition of GFS to NEMS.

  • T1534 Semi-Lagrangian (13km)
  • More accurate spectral-grid transforms
  • Reduced grid consistency when creating orographic fields
  • Use of high resolution daily SST analysis
  • Use of high resolution sea ice
  • Physics
    • Cloud estimate modifications
    • EDMF parameterization
    • Dissipation heating paramterization
    • Convective gravity wave drag
    • McICA
    • Modify how GFS diagnoses snow accumulation to be consistent with post
    • Land Surface - Removal of soil moisture nudging
  • Unification of analysis ensemble with GEFS ensemble
  • Ensemble resolution increase to T574L64
  • Analysis upgrades - See global GSI implementation roadmap
  • Post Processor
    • Faster/less memory version
    • Updated version to use new crtm 2.1.3
    • add user requested fields
      • H/T/U/V at FL410,
      • ozone at 150, 200, 250, 300, 350, and 400 mb,
      • 2m dew point,
      • wind chill and heat index,
      • instantaneous precipitation type
      • membrane SLP in GDAS pgb files
    • Improved in flight icing algorithm in post
    • Consolidation of GFS master file creation with GFS DNG, similation of GOES radiances and WAFS

Future Implementations:


Date

Title

Q1FY16 Global Model Upgrade (Click to read more)
_________________________________________________________________________________________________________________

Previous Implementations:


Date

Title

2012090512 Correction to Land Surface Model in Global Forecast System and associated cool and moist bias in near surface temperature and moisture fields (Click to read more)
2012052212 Hybrid EnKF - 3DVar GSI data assimilation (Click to read more)
2011050914 GFS 9.0.1 (Click to read more)
2010072712 T574 W/ NEW PHYSICS - July 27th 2010 (Click to read more)