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title13-06-2007 MetOffice

The UKMO TIGGE suite (MOTHS) was upgraded on 13 June 2007 00Z.

Model Version

  • The UM was upgraded from Portable UM (PUM) version 6.0 to 6.1.

Stochastic Physics

  • Random Parameters Scheme (RP) upgraded to version 2.
  • Stochastic Convective Vorticity (SCV) upgraded from version 6.0 to 6.1.
  • Additionally a (portability) bug was fixed in SCV that resulted in anomalous results in the tropics.
  • Stochastic Kinetic Energy Backscatter (SKEB) was introduced at version 11.3.

UM Science Pack was upgraded from cycle 34 to cycle 39 (representing the operational deterministic model active as of June 2006). The main features are:

  • Small improvements to mid-level convection.
  • Introduction of the adaptive detrainment scheme.
  • Changes to the formulation of the thermal roughness length.
  • Other miscellaneous boundary level improvements.
  • Updated soil parameter ancillary fields.

NCEP

Info
title23-09-2020 NCEP

GEFS v12 upgrade, effective 2020 Sep 23 12z:

  • FV3 dynamical model, GFDL MP, Stochastic physics, two-tier SST with NSST, No TS relocation
  • increased ensemble size from 21 to 31
  • increased horizontal resolution for TIGGE from 1 to 0.5 degree


Info
title09-03-2010 NCEP

NAEFS upgrade, effective 12Z:

  • GFS bias correction
  • Combination of GFS & GEFS forecasts
  • Probabilistic NAEFS forecasts
  • Downscaled NAEFS forecasts

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