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title17-08-2011 CMC

The CMC global ensemble prediction system was upgraded to version 2.0.2 on 17 August 2011.
The main changes included in this upgrade are:

  • The number of members in the ensemble Kalman filter is doubled from 96 to 192.
  • The resolution of the medium-range forecasts is changed from 100 to 66 km.
  • The model top is raised from 10 hPa to 2 hPa.
  • A new dynamical model, with a Charney-Phillips vertical grid, is used.


Further documentation of the operational upgrade can be found at:
http://collaboration.cmc.ec.gc.ca/cmc/CMOI/product_guide/docs/changes_e.html

ECMWF

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title08-03-2016 ECMWF

Update of ECMWF forecast system. A new version of ECMWF model (IFS cycle 41r2) was introduced at ECMWF. 

The main consequences for ECMWF-TIGGE data are:
  • Introduction of a new form of the reduced Gaussian grid, the octahedralgrid, for HRES, ENS and ENS Extended;
  • Horizontal resolution of the HRES increased from TL1279 / N640 to TCO1279 / O1280, where subscript C stands for cubic and O for octahedral;
  • Horizontal resolution of the ENS increased from TL639 / N320 to TCO639 / O640 for ENS (Days 0 - 15) and from TL319 / N160 to TCO319 / O320  for ENS Extended (Days 16 - 46);
  • For the medium-range ENS there will no longer be a decrease of resolution at day 10: the ENS Days 11 - 15 will be run at the same TCO639 / O640 resolution as ENS Days 0 - 10;

Click  here for full details.

Info
title26-01-2010 ECMWF

The ECMWF model was upgraded to cycle 36r1 on 26 January 2010.

The main changes included in this cycle are:

  • Deterministic forecast and analysis horizontal resolution is increased from T799 to T1279, i.e. from 25 km to 16 km.
  • EPS resolutions are increased from T399/T255 to T639/T319 for Leg A/B respectively. That is to say, the first 10 days of the EPS (Leg A) will run at T639 (32 km) and the extension beyond day 10 (Leg B) will run at T319 (63 km).
  • Correction of short-wave radiation interaction with clouds.

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