Ecco qui, finalmente...

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





Fonte: National Centers for Environmental Prediction

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