摘要
将新回归系数估计法和新误差订正法应用于3km的雷达CAPPI估测降水,首先用新的回归方法得出更合理的Z-I关系;再用基于变分技术的新的误差订正方法对估算出的降水进行订正,获得较好的估算结果,并且用2005年6月17～25日广东自动站降水和每6分钟一次的雷达基数据对新回归系数估计法和新误差订正法进行验证,结果表明:将新回归系数估计法和新误差订正法用于雷达估测降水,能更好地对雷达回波强度估算降水的一些常见误差进行校订。
In order to estimate rainfall by using the CAPPI of 3-km radars, a new regression coefficient estimation and a new method for errors correction are used. Firstly, using the new regression estimation is used to obtain a more reasonable relation of Z-I. Then the estimated precipitation is corrected with the new method of errors correction. The two new methods are verified by using rainfall data from automatic weather stations in Guangdong province and base data of radar available once every 6 minutes for the period from June 17 to 25, 2005. The results indicate that estimating the rainfall with the new regression coefficient estimation and the new correction method of errors is better than the normal methods.
出处
《热带气象学报》
CSCD
北大核心
2008年第5期546-549,共4页
Journal of Tropical Meteorology
基金
中国气象局气象新技术推广项目“CINRAD资料同化技术及其数值预报业务应用”(CMATG2005M18)
广东省气象科研项目(2006B23)
广东省科技局科研项目“基于GARAPES平台珠三角城市群区域精细化数值天气预报系统的应用开发”共同资助
关键词
新的回归系数估计法
新的误差订正方法
估测降水
减小误差
new regression coefficient estimation
new correction method of errors
rainfall estimation
reduction of errors
