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投稿时间：2005-04-18 修订日期：2005-11-09
投稿时间：2005-04-18 修订日期：2005-11-09
中文摘要: 利用多普勒天气雷达资料和中尺度数值模式模拟分析了2004年12月20日夜里起到22日黄淮出现的大范围暴雪天气过程。发现黄淮地区暴雪天气形成的原因和特点明显不同于梅雨锋暴雨。多普勒雷达探测资料可以很好地反映这场暴雪的特点:对流高度不高,平均高度3～4km左右,最高不超过8km。在强降雪时近地面925hPa附近伴有很强的超低空急流,东北偏东风,风速达12～14m·s-1。高低空垂直切变明显,有很强的斜压性。高分辨率的中尺度数值模式可以很好地模拟出这次过程的演变和特点。
中文关键词: 数值模拟，暴雪，诊断分析
Abstract:From the night of 20 to 22 in Dec. 2004, a heavy snow event occurred in Huanghuai basin. The event is analyzed with Doppler radar data and simulated with mesoscale numeric model. It shows that the generation and characteristics of heavy snow was definitely different from that of heavy rain in Meiyu front. The characteristics of the heavy snow could be well described with Doppler radar data: the average convective height was 3—4km, the maximal height less than 8km. When the snow was heavy, a very strong low-level jet was found. It was ENE, 12—14m·s-1, near surface, at 925hPa. The vertical shear between upper level and low level was obvious. The baroclinicity was very strong. The evolution and characteristics of this event could be well simulated with high resolution mesoscale numeric model.
keywords: heavy snow, Doppler radar, Simulation
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引用文本：
王东勇,刘勇,周昆,2006.2004年末黄淮暴雪的特点分析和数值模拟[J].气象,32(1):30-35.
,2006.Diagnosis and Numeric Simulation of Snowstorm Process in Huanghuai Basin in Dec.2004[J].Meteor Mon,32(1):30-35.
王东勇,刘勇,周昆,2006.2004年末黄淮暴雪的特点分析和数值模拟[J].气象,32(1):30-35.
,2006.Diagnosis and Numeric Simulation of Snowstorm Process in Huanghuai Basin in Dec.2004[J].Meteor Mon,32(1):30-35.