Global Ensemble Prediction System
The Global Ensemble Prediction System (GEPS) carries out physics calculations to arrive at probabilistic predictions of atmospheric elements from the current day out to 16 days into the future (up to 39 days twice a week on Mondays and Thursdays at 00UTC for calculating forecast anomalies). The GEPS produces different outlooks (scenarios) to estimate the forecast uncertainties due to the nonlinear (chaotic) behavior of the atmosphere. The probabilistic predictions are based on an ensemble of 20 scenarios that differ in their initial conditions, their physics parameters which are randomly perturbed by a Stochastic Parameter Perturbation (SPP) method, and the stochastic perturbations (kinetic energy). A control member that is not perturbed is also available. Weather elements include temperature, precipitation, cloud cover, wind speed and direction, humidity and others. This product contains raw numerical results of these calculations. Geographical coverage is global. Data is available on some fifteen vertical levels on a global latitude-longitude uniform grid with 0.5 degree horizontal resolution (about 39km). Predictions are performed twice a day.
Metadata
Date Created
2010-10-25
Date Published
2022-05-02
Temporal Coverage
1996-01-24 - Present
Access in last 30 days
4
All time access
1,112
Source(s) and Citation
Government of Canada; Environment and Climate Change Canada; Meteorological Service of Canada. (2022-05-02). Global Ensemble Prediction System.
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probabilistic predictions, global, ensemble, precipitation, weather forecasts, humidity, air temperature, wind, meteorological data, snow, weather and climate, provide weather information products and services, deliver weather products and services to clients, meteorological service of canada, weather and environmental operations, unclassified, international
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