中尺度模式和新一代天气雷达产品识别云降水方法  

Method for Discriminating Cloud Precipitation by Mesoscale Model and CINRAD Radar

作　　者：胡雯[1] 黄勇[1] 翟菁[1] 

机构地区：[1]安徽省气象科学研究所,合肥230061

出　　处：《气象科技》2007年第4期470-473,共4页Meteorological Science and Technology

基　　金：中国气象局新技术推广项目(CMATG2005M34);安徽省气象局科技带头人专项(KD200510)共同资助

摘　　要：介绍一种结合中尺度模式产品和新一代天气雷达产品的云降水识别方法。首先利用中尺度模式(MM5)产品计算得到降水潜力区识别因子,分析降水潜力区。进一步结合新一代天气雷达产品,分析潜力区内云团的降水参数,确定有利于降水的云团。分析结果表明,潜力综合指标对未来可能出现的具有大量水资源的对流性系统具有指示意义,可以用于分析对流性系统的降水潜力;另一方面雷达降水等级是对实际对流云团水资源等级的划分。综合这两者进行降水潜力的分析判别,可以增强降水云的识别能力。A method for discriminating cloud precipitation based on a mesoscale model and CINRAD radar in Anhui Province is introduced. The mesoscale model MM5 products are used to extract the index of potential precipitation areas, and then the CINRAD products are used to analyze the precipitation factors relevant to the cloud clusters with the potential for precipitation. The results show that the composite potential index can denote the occurrence probability of convective systems containing abundant water, and therefore can be used to analyze the precipitation potential of convective systems. The precipitation grade index deduced from CINRAD data is in fact devised according to the water resource grades of convective clouds. As the result, the precision of cloud precipitation discrimination could be enhanced by combining these two kinds of parameters.

关 键 词：云降水 中尺度模式 MM5 新一代天气雷达 

分 类 号：P456.7[天文地球—大气科学及气象学]