摘要
基于常规气象资料和宁夏中尺度区域数值模式MM5输出结果,应用天气学及诊断分析方法,对2004年6月14日和2005年5月30日发生在宁夏的两次典型冰雹天气过程,从环流背景、影响系统、冰雹落区、大气层结稳定度及动力条件等方面进行了对比分析。结果表明:两次冰雹天气过程均发生在宁夏冰雹易发期夏初季节的午后,是在"西高东低"有利于强对流天气发生的环流背景下,受蒙古冷涡影响而形成的。由于环流形势及其演变的不同,使蒙古冷涡移动路径有所差异,造成宁夏不同区域受到冰雹袭击。
Using normal meteorological observations and MM5 output from synoptic and diagnostic analysis methods, the two typical hail weather happening on June 14, 2004 and May 30, 2005 were analysed in view of circulation background, main impact systems ,hail area, stability of the atmosphere and dynamics conditions. The result shows that both the typical hail process occured at afternoon in early summer when hailstone occured easily and formed under the influence of the Mongolian cold vortex and the circulation background that high pressure at west of Ningixa and low pressure at east of Ningixa. The different atmospheric circulation and its evolvement lead to different moving path of Mongolia cold vortex and different area of Ningxia attacked by hailstone.
出处
《自然灾害学报》
CSCD
北大核心
2008年第2期103-109,共7页
Journal of Natural Disasters
关键词
冷涡
冰雹
对比分析
宁夏
cold vortex
hail
comparative analysis
Ningxia
