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中文摘要: 用3种客观评分方法对国家气候中心为三峡库区提供的月动力延伸预报产品(500hPa位势高度场)进行了全面评估。结果表明,延伸预报月平均环流场预报准确率明显高于持续性预报和气候预报,有一定的预报技巧,对三峡工程气象服务有参考价值。从动力与统计相结合的角度出发,利用推导的月降水距平与月环流场的关系,建立了三峡库区代表站点月降水距平预报方程,利用月动力延伸预报的500hPa高度场和实际降水场资料反演出月降水距平预报方程的系数。经过1999年降水预报试验,证明效果较好。
中文关键词: 延伸预报，技巧评估，三峡工程，降水预报
Abstract:Products of monthly dynamic extended range forecast (DERF) on Three Gorges Engineering were evaluated by using three score methods.The skills of monthly DERF is generally better than that of persistence and climate forecast.The products of DERF can be used as a reference in the serve of Three Gorges Engineering.Furthermore,a blending method of dynamical and statistical approaches was presented,which has established a relationship between monthly precipitation anomaly and monthly circulation.The relationship between monthly precipitation forecast equation and its coefficients was determined by using 500hPa potential height anomaly of ensemble dynamical extended range forecast (DERF) and observed precipitation.The results show that the method is useful in forecasting monthly rainfall anomaly using potential height of ensemble DERF through precipitation forecast tests in 1999.
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基金项目:国家气象局气象科技“短平快”课题02-02子专题的资助
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引用文本：
陈丽娟,李维京,2001.月动力延伸预报产品在三峡工程建设服务中的应用[J].气象,27(3):23-25.
,2001.Application of Products of Monthly Dynamic Extended Forecast to Three Gorges Engineering[J].Meteor Mon,27(3):23-25.
陈丽娟,李维京,2001.月动力延伸预报产品在三峡工程建设服务中的应用[J].气象,27(3):23-25.
,2001.Application of Products of Monthly Dynamic Extended Forecast to Three Gorges Engineering[J].Meteor Mon,27(3):23-25.