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气象:2006,32(11):81-87
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湖南新邵太芝庙乡特大致洪暴雨分析
(1.湖南省气象台, 410007;2.湖南省娄底市气象台;3.电子科技大学计算机学;4.湖南省邵阳市气象台)
Analysis of Taizhimiao Heavy Rainfall and Mountain Torrent in Hunan Province
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投稿时间:2006-04-11    修订日期:2006-10-08
中文摘要: 利用地面和高空常规观测资料及水文雨量点资料、多普勒雷达回波资料、美国WRF中尺度数值模拟资料,对2005年5月31日夜间发生在湖南新邵太芝庙乡的大暴雨过程进行了分析和数值模拟。结果表明:大气层结的强烈不稳定,超强的风垂直切变,是形成对流性暴雨的重要条件;在有利的大尺度环流背景下,大暴雨同一条东北西南向的切变线上中β尺度气旋的演变和发展密切相关,暴雨区上空的经向次级环流的形成和维持是大暴雨形成的另一个条件。分析还发现:太芝庙乡复杂的地形对大暴雨的产生及特大山洪的爆发起着十分重要的作用。
Abstract:A heavy rainfall and mountain torrent occurred in May 31,2005 at Taizhimiao Town,Shaoyang,Hunan Province.An analysis of the event is made based on the routine meteorological observations and hydrological rainfall,Doppler radar detection,and numerical simulation of WRF model.It shows that the important conditions causing the event are the strong instability of atmospheric stratification and severe vertical wind shear in the area.Under the background of favorable large-scale circulation,the heavy rainfall is closely related with the evolution and development of a meso-β-scale cyclone on a north-south shear line.Another condition causing the event is the formation and maintenance of a secondary meridional circulation over the heavy rainfall area.In addition,the complicated topography of Taizhimiao plays an important role in the appearance of the heavy rainfall and the outburst of the enormous mountain torrent.
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引用文本:
周雨华,刘志雄,谭一洲,尹忠海,黄小玉,彭双姿,2006.湖南新邵太芝庙乡特大致洪暴雨分析[J].气象,32(11):81-87.
,2006.Analysis of Taizhimiao Heavy Rainfall and Mountain Torrent in Hunan Province[J].Meteor Mon,32(11):81-87.