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CN 11-2282/P
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Archive > Volume 37 Issue 1 > 2011,37(1):31-38. DOI:10.7519/j.issn.1000-0526.2011.1.004 Prev Next

Study of BiasCorrection in T213 Global Ensemble Forecast

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    Abstract:
    In view of existence of model systematic error, a study of biascorrection has been done to estimate and reduce systematic error. Onemoment biascorrection has been introduced in this paper. The merit of this method is that quantity of samples needed is smaller, thus estimation and biascorrection could be carried out quickly and economically. Onemoment biascorrection towards T213 global ensemble forecast of 500 hPa height, 850 hPa temperature and 2m temperature has been done. Verification towards raw forecast and biascorrected forecast shows that ensemble member homogeneity and cold bias have been improved, and ensemble mean RMSE and ACC also have been improved, especially bigger systematic error of 2m temperature forecast has been improved obviously.

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