摘要
基于T213L31、T106L19和欧洲中期预报中心数值预报产品,应用BP人工神经网络技术,建立了850 hPa高度区域温度集成预报模型,并进行了检验。结果表明:该模型能比较准确地预报强冷空气活动过程中冷中心及温度槽脊的位置和强度,预报结果的平均绝对误差明显小于3个子模式,预报场与实况场的相关程度明显高于3个子模式,预报误差在我国华北北部、东北地区较小,在蒙新高地和帕米尔高原地区误差较大。模型实现了多模式产品的最优综合。
Based on the production of T213L31,T106L19 and ECMWF,the regional multi-model integration temperature forecast model at the level of 850 hPa was developed using artificial neural network method.Forecast testing result indicated that the model could forecast the center of cold air developing,the position and intensity of temperature trough and ridge,and the mean error of forecast result was obviously smaller than that of three single model,the correlation between the forecasted and observed field was better than that of three single model.Forecast error was small over north and eastern China,but big over Mengxin highland and Pamirs.The multi-model integration based on artificial neural network was a kind of effective method to temperature forecast.
出处
《干旱气象》
2011年第2期231-235,250,共6页
Journal of Arid Meteorology
关键词
人工神经网络
温度场预报
多模式集成
artificial neural network
temperature field forecast
multi-model integration
