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title17-06-2020 CMA (babj)

The CMA global ensemble prediction system was upgraded on 26 December, 2018. The first updated CMA outputs for TIGGE archive have been ingested only since 1 June 2020.

The main changes in this upgrade are:

  • The forecast model system is changed from TL639 L60 to GRAPES_GFS, correspondingly, the horizontal resolution is changed to 50km, and the model top is changed to 3hPa.
  • The initial perturbation method is changed from Bred Vector to Singular Vector.
  • The SKEB is introduced in the model perturbations.
  • The ensemble size is changed from 15 to 31.

Full details are available in the page Models.


title2024 DWD model updates during 2024

2024 Jan 24 - Extended coupling between ICON model parameters and data assimilation building upon the 10M-wind assimilation

title2023 DWD model updates during 2023

2023 Mar 15 - icon-2.6.5-nwp1

  • Extension of model-DA coupling for optimizing T2M and RH2M scores
  • Modification of Charnock parameterization for ocean surface roughness
    Sep 6 - icon-2.6.6-nwp0
title2022 DWD model updates during 2022

2022 May 11 - version ICON-2.6.4-nwp4

  • Extended coupling between ICON model parameters and data assimilation building upon the T2M assimilation

2022 Jul 4 - version ICON-2.6.4-nwp5

  • Improvement of model-DA coupling for surface evaporation

2022 Nov 23 - resolution upgrade ICON-EPS (ICON deterministic unchanged)

  • horizontal resolution: global / 40km to 26km, EU / 20 km to 13 km EU domain.
  • number of model levels: global / 90 => 120, EU / 60 to 74


title15-04-2021 ECCC data resolution change

The horizontal resolution of the ECCC contribution to TIGGE has been increased from 1.0 to 0.25 degree since 12Z  Also the GRIB 2 packing has been changed to simple instead of complex one (that will generally  increase file sizes but also  significantly reduce time needed to process such data).


title11-07-2017 MetOffice

UM upgraded to version PS39 from 12UTC cycle on 11 July 2017.

TIGGE global ensemble (the Met Office MOGREPS-G) was upgraded to 20km (from 33km), N640L70, 280x960 lat-long grid, 0.1875 N-S x 0.28125 E-W degrees;  the MOGREPS-G will continue to run four times a day (00, 06, 12 and 18UTC), but the number of ensemble members per run has increased from 12 to 18, with the last two runs being combined to create a 36-member time-lagged ensemble.

Forecast length remains at 7d 6h.

Relevant associated deterministic/data assimilation changes:

  • Replace RTTOV9 by RTTOV11
  • New ground GPS observation operator
  • Improved snow analysis reconfiguration
  • Upgrade to UM10.6


title08-11-2016 MetOffice

UM upgraded to version PS38 from 6UTC cycle on 8 November 2016.

The changes include predominantly a satellite applications package to include more satellite channels, re-tuned observation error estimates and better quality control of observations. This is expected to improve the headline NWP index scores by about +0.5 to +1.0 against analyses, observations, and independent ECMWF analyses.

Satellite package includes:

  • Improved use of infrared and microwave satellite data over land, providing more temperature information at lower levels.
  • Improved global humidity forecasts, due to more weight being given to satellite humidity information in our analysis.
  • Incorporation of more Chinese polar orbiting satellite data, following our initial introduction in March 2016.
  • The introduction of data from a new Japanese Geostationary satellite, Himawari-8.