风廓线雷达资料在强降水预报中的应用  

THE USE OF WIND-PROFILING RADAR DATA IN HEAVY PRECIPITATION FORECAST OF DALI

作　　者：陈红玉[1,2] 钟爱华 李建美 高志伟[1,2] 

机构地区：[1]云南大学大气科学,云南昆明650091 [2]大理州气象局,云南大理671000

出　　处：《云南地理环境研究》2009年第5期63-68,共6页Yunnan Geographic Environment Research

摘　　要：利用高分辨率风廓线雷达资料和自动站逐时降水资料,详细分析了云南省大理州2008年6月的两次大气环流背景较为相似,但降雨强度和范围却不同的强降水天气过程。在天气转折前,两次过程测站上空的垂直速度和信噪比的变化较相似,但有量值差异大、水平风垂直切变明显不同等特点。揭示了两次强对流天气在高层大气环流背景较为相似的情况下,因低层空间气流变化的剧烈和复杂程度不同而降水分布和降水特点不同的客观事实,并找出了强降水预报着眼点和定性指标。The high-resolution wind-profiling radar data of Dali national climate observatory and precipitation data by-hour of automatic meteorological station are used to analysis deeply two synoptic process of Dali in Yunnan province which both occur in June 2008. These two synoptic processes have the same circulation system but different intensity and coverage in precipitation. It shows that the variation of both vertical velocity and signal noise ratio of those two synoptic processes is very similar before the weather turns. But the difference in quantity of vertical velocity and signal noise ratio of those two synoptic processes is very big. And it is obviously different in vertical shear of horizontal wind dnring rainfall of those two synoptic processes. The fact was revealed that the different intensity and complexity degree of the variation of air flow on low level lead to the different intensity and coverage in precipitation in those two synoptic processes which have the same circulation-system. The focus and qualitative index of forecasting heavy precipitation were found.

关 键 词：风廓线雷达 强降水 临近预报 

分 类 号：P457.6[天文地球—大气科学及气象学]