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HOME > About TCC (Data and Products) > Ensemble Prediction System

About Numerical Long-range Prediction

JMA operates a numerical prediction system composed of a global atmospheric circulation model and a land process model for one-month, three-month and summer/winter season forecasts. An ensemble prediction technique (which calculates atmospheric evolution from many initial conditions around the most likely one) is employed to increase accuracy, and is applied to probabilistic forecasts.

TCC provides ensemble prediction maps and verification charts of one-month, three-month and summer/winter season prediction through the TCC Web Site. These are available to all users. Registered users of NMHSs can access Grid Point Values (GPVs) of ensemble products in addition to charts.

One-month Prediction Maps --- upper left: precipitation amounts and their anomalies, lower left: surface temperature and anomalies


Tokyo Climate Center, Climate Prediction Division, 1-3-4 Otemachi, Chiyoda-ku, Tokyo, Japan.
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