  A new prediction error correction scheme based on 74 circulation
characteristics data provided by Weather Diagnostic Forecasting Division of
National Climate Center, which is designed to develop the Operational Numerical
Forecast Model (ONFM) of the National Climate Center of China, and the skill
level of the precipitation prediction for rainy season in the midlower reaches
(MLR) of the Yangtze River by ONFM is obviously raised. The approach use
principal component(PC) analysis to prediction error of ONFM. And we used
different factors to correct the different PCs of the error of precipitation
field. The comparative study results indicate that the effectiveness of the new
analogue error correction (AEC) scheme is better than system error correction
(SEC) scheme.
