J4 ›› 2008, Vol. 26 ›› Issue (1): 64-68.

• 论文 • 上一篇    下一篇

华北地区一次局地暴雪天气过程的诊断分析

马秀玲1 ,彭九慧1 ,杨雷斌1 ,王 宏1 ,杨庆红1 ,刘伯华2
  

  1. 1. 河北省承德市气象局,河北 承德 067000; 2. 河北省廊坊市气象局,河北 廊坊 065000
  • 收稿日期:2007-11-21 修回日期:2008-01-11 出版日期:2008-03-31 发布日期:2008-03-31
  • 作者简介:马秀玲(1963 - ) ,女,河北省承德市人,工程师,主要从事人工影响天气研究工作

Ana lysis of a Loca l Snow Storm in Spr ing of 2007 in North Ch ina

MA Xiuling1 , PENG J iuhui1 , YANG Leibin1 , WANG Hong1 , YANG Qinghong1 , L IU Bohua2   

  1. 1. ChengdeM eteorological B ureau of Hebei Province, Chengde 067000, China;2. Langfang M eteorological B ereau of Hebbei Province, Langfang 065000, China
  • Received:2007-11-21 Revised:2008-01-11 Online:2008-03-31 Published:2008-03-31

摘要:

应用常规资料、卫星云图和多普勒雷达资料,对2007年春季承德市暴雪天气从形成的大尺度背景、水汽条件、动力条件进行分析。结果表明:东部高压脊的阻挡导致南北低值系统的合并加强,它的移动缓慢造成了这次暴雪天气。低层辐合和低空急流的建立造成大范围的水汽辐合和源源不断的水汽输送,深厚的大气湿层为大的降水提供了有利的环境条件;散度场、垂直速度场、k - 螺旋度的高低空配置和时空变化是暴雪天气发生、发展的动力条件。结合红外卫星云图,分析实时的多普勒雷达资料对预测暴雪天气的发展变化至关重要

关键词: 暴雪, 环流背景, 急流, 垂直速度, 螺旋度

Abstract:

Based on the conventional data, satellite cloud images and Dopp ler Radar data, the snow storm weather occurred in sp ring of
2007 in Chengde was analyzed from the large - scale background, water vapor and dynamic conditions. The results indicate that the
block from the eastern p ressure ridge leads to themerger and intensification of the north and the south low - p ressure systems, andmov2
ing slowly of the low - p ressure system results in this storm event. The convergence in the lower level and the foundation of low level jet
made large - scale water vapor convergence and continualwater vapor transmission, and the deep - thick atmosphere wet layer p rovides
a favourable surrounding condition and the divergence, vertical velocity and k - helicity fields are dynamic conditions for this heavy rain.

Key words: snow storm, circulation background, jet, vertical velocity, helicity, Dopp ler radar

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