天气雷达Z-I关系本地化及RPG降水产品改进  

Localization of Z-I Relation and RPG Precipitation Product Improvement for Weather Radar

作　　者：王树雄[1] 薄兆海 张俊峰[1] 王锡军[1] 

机构地区：[1]辽宁省大连市气象局,大连116001 [2]辽宁省气象局,沈阳110001

出　　处：《气象科技》2013年第3期430-435,共6页Meteorological Science and Technology

摘　　要：利用2004—2008年5—9月大连新一代天气雷达和自动站资料,在进行回波分型、多次采用最优化Z-I关系,结合系统误差消除的技术方法,得到适用于实际业务需要的整体本地化Z-I关系。以大连地区2008年全部5次大暴雨过程为例,经RPG数据处理系统中的降水估计产品检验,较沿用WSR-88D默认值生成值准确率提高40%以上,经2009—2011年使用,估算准确率稳定在75%以上,提高了天气雷达数据处理的质量。Using the data of Doppler radar from May to September, 2004 to 2008 and automatic station data in Dalian, by means of the echo typing, optimal Z-I relation, system error elimination techniques, the overall localized Z-I relation is obtained, which is applicable to operational observation. Taking five heavy rain events in Dalian in 2008 as examples, application experiments are conducted. The results indicate that there is a substantial increase （more than 40%） in the accuracy of precipitation estimate of RPG precipitation estimate products, compared with the default estimate value from WSR-88D. The application from 2009 to 2011 shows that the accuracy of the estimate values is up to more than 75~//00 steadily.

关 键 词：天气雷达 Z-I关系 本地化 RPG降水产品 

分 类 号：P457.6[天文地球—大气科学及气象学]