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《Meteorological Science and Technology》 2006-01
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Analysis of Characteristics of Doppler Weather Radar Images during a Precipitation Process in Spring

Wang Lirong~1 Tang Dazhang~2 Zhang Yangang~3(1 Shijiazhuang Municipal Meteorological Bureau,Shijiazhuang 050081;2 Department of Atmospheric Sciences,Nanjing University of Information Science & Technology,Nanjing 210044;3 Hebei Meteorological Office,Shijiazhuang 050021)  
A large-scale heavy rainfall process occurred in North China on 25 April 2004 is analyzed,and the methods of using Doppler weather radar radial velocity PPI and vertical velocity profile(VWP) are introduced.Based on the two radar products,the situation of cold and thermal advection,convergence and divergence at different altitudes can be identified comprehensively and then either ascending or descending air can be identified,so to deduce the occurrence of rainfall.Meanwhile,according to the analyses of this rainfall case,some Doppler weather radar image characteristics during heavy rainfall in spring are discussed.It is found out that there are obvious characteristics in the two radar products at the different stages of rainfall development(formation,development,and dissipation),which provides some reference for rainfall forecasting in spring.
【Fund】: 江苏省科技厅BS2003054项目资助
【CateGory Index】: P458.121
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