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投稿时间:2007-05-10 修订日期:2007-12-11
投稿时间:2007-05-10 修订日期:2007-12-11
中文摘要: 利用新一代中尺度数值模式WRF对2004年11月24—25日发生在华北的一次回流暴雪过程进行了数值模拟,并着重对回流暴雪形成发展的机制进行了分析研究。在回流暴雪形成与发展的过程中,动力锋生机制发挥了重要作用;其产生的锋面次级环流是造成这次暴雪的主要原因;降水过程中,雨雪相态的转变与温度廓线有直接关系,随着降水由雨转为雪,雪水混合比增大迅速且其高度有所降低。地形在此回流暴雪过程中,通过其强迫的、分别位于迎风坡和背风坡的正负垂直速度中心,对降雪起明显的增幅作用,同时对雨水和云水分布产生影响。
Abstract:By use of the next generation meso scale non hydrostatic model WRF, a
backflow snowstorm over North China on Nov.24-26,2004 was simulated and analyze
d. The development mechanisms of backflow precipitation are analyzed with the r
easonable simulation results. The results show that dynamical frontogenesis play
s a very important role in the development of backflow snowstorm. The frontogene
tical secondary circulation directly causes the snowstorm. Mount Tai plays a ver
y important role in the case and makes the positive and minus extremes of vertic
al velocity in the upslope and lee, respectively. Meanwhile it affects the dist
ribution of rain water and cloud water.
keywords: backflow snowstorm numerical simulation amical
frontgenesis secondary circulation topography
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基金项目:中国气象局“山东半岛冷流暴雪的中尺度特征研究”(CMATG2007Y08),山东省气象局“山东省精细化数值预报系统的开发”(2006sdqxz08)
Author Name | Affiliation |
Zhou Xuesong | Department of Atmospheric Sciences,Nanjing University,210093 |
Tan Zhemin | Department of Atmospheric Sciences,Nanjing University,210093 |
引用文本:
周雪松,谈哲敏,2008.华北回流暴雪发展机理个例研究[J].气象,34(1):18-26.
Zhou Xuesong,Tan Zhemin,2008.Case Study on Development Mechanism of a Snowstorm over North China[J].Meteor Mon,34(1):18-26.
周雪松,谈哲敏,2008.华北回流暴雪发展机理个例研究[J].气象,34(1):18-26.
Zhou Xuesong,Tan Zhemin,2008.Case Study on Development Mechanism of a Snowstorm over North China[J].Meteor Mon,34(1):18-26.