Major Upgrade Scheduled For Canadian Weather Model

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srainhoutx
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MAJOR UPGRADE TO THE GLOBAL DETERMINISTIC PREDICTION SYSTEM GDPS-
VERSION 3.0.0) AT THE CANADIAN METEOROLOGICAL CENTRE
ON WEDNESDAY FEBRUARY 13, 2013, STARTING WITH THE 1200 UTC RUN, THE
CANADIAN METEOROLOGICAL CENTRE (CMC) OF THE METEOROLOGICAL SERVICE
OF CANADA (MSC) WILL IMPLEMENT VERSION 3.0.0 OF ITS GLOBAL
DETERMINISTIC PREDICTION SYSTEM (GDPS), HEREAFTER REFERRED TO AS
GDPS-3.0.0. THE MAIN CHANGES OF THIS UPDATE ARE:

- CHANGES TO THE 4D-VAR DATA ASSIMILATION SYSTEM: - THE USE OF
ADDITIONAL REMOTE SENSING DATA: - AN INCREASE IN HORIZONTAL
RESOLUTION FROM 33 TO 25 KM: - IMPORTANT CHANGES IN THE GEM MODEL
PHYSICS: - AND 1200 UTC RUNS NOW DONE TO 240 HOURS AS FOR 0000 UTC
RUNS.

OBJECTIVE SCORES DONE IN DEVELOPMENT AND PARALLEL RUN PHASES SHOW
IMPROVEMENTS IN THE FORECASTS WITH MOST METRICS THROUGHOUT MOST OF
THE ATMOSPHERE, IN PARTICULAR OVER NORTH AMERICA IN WINTER. THESE
IMPROVEMENTS ARE OF AN ORDER OF MAGNITUDE USUALLY SEEN ONLY ONCE IN
A DECADE.
A SUBJECTIVE EVALUATION BY OPERATIONAL METEOROLOGISTS AT
CMC CONFIRMED THOSE IMPROVEMENTS. OTHER FORECAST SYSTEMS WHICH
DEPEND ON GDPS OUTPUT ALSO BENEFIT FROM THE GDPS-3.0.0. CHANGES
WERE MADE TO THE REGIONAL DETERMINISTIC PREDICTION SYSTEM (RDPS) TO
HARMONIZE IT WITH THE NEW GDPS, AND THE RDPS FORECASTS ARE ALSO
IMPROVED AS A RESULT, SO ITS VERSION NUMBER IS ALSO INCREASED TO
3.1.0, AND IS HEREAFTER REFERRED TO AS RDPS-3.1.0.


http://dd.weatheroffice.ec.gc.ca/doc/ge ... 10___00179
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