2006年6月25日邵阳大暴雨天气过程诊断分析  

Diagnostic Analysis of A Heavy Rainfall on 25 th,June,2006 in Shaoyang

作　　者：吕校华[1,2] 刘从省 朱和香 钟伟业 杨志军 

机构地区：[1]兰州大学大气科学学院,甘肃兰州730000 [2]湖南省邵阳市气象局,湖南邵阳422000 [3]湖南省邵东县气象局,湖南邵东422800 [4]湖南省新宁县气象局,湖南新宁422700 [5]湖南省城步县气象局,湖南城步422500

出　　处：《安徽农业科学》2010年第3期1324-1328,共5页Journal of Anhui Agricultural Sciences

摘　　要：利用常规探空资料、地面观测资料、T213数值预报资料和卫星云图等,对发生在邵阳的大暴雨过程进行了诊断分析。结果表明,大暴雨是在欧亚中高纬度两槽一脊型的环流形势中产生的,槽线和切变线是主要影响系统;700 hPa的水汽来自孟加拉湾和南海,850和500 hPa的水汽来自南海;大暴雨发生前,低层有较强的水平能量输送和较强的能量积聚,同时整个暴雨区的大气运动由下沉运动转变为上升运动;中低层Q矢量的辐合和大暴雨的落区、发生时段有很好的对应关系;低层正涡度、高层负涡度与低层强辐合、高层强辐散完全一致,"抽吸作用"和反馈作用对大暴雨的形成非常有利。Based on some routine sounding data, surface meteorological Observation , T213 numerical forecasting and satellite pictures, the diagnostic analysis of a heavy rainfall occurred in Shaoyang was made. The results showed that the heavy rainfall happened on the condition of two-trough and one-ridge current pattern in the mid and high latitude of Eurosia. The trough line and shear line were the main influential system; the vapor at 700 hPa came from the Bay of Bengal and South China Sea, and vapor at 850 hPa, 500 hPa were from South China Sea. There were strong energy transportation and accumulation in the low levels before the rainfall, as well as the atmosphere motion was changed from descending motion to ascending motion in the whole rainfall area. The Q vector convergence at low levels was correlated well to the downfall area and time. The low-level positive vorticity, the high-level negative vorticity were in agreement well with low-level convergence and high-level divergence. The effects of pumping and feedback were very favorable for the heavy rainfall.

关 键 词：大暴雨 诊断分析 物理量场 反馈作用 

分 类 号：S161.6[农业科学—农业气象学]