期刊文献+

重庆“5·6”强对流过程诊断分析 被引量:4

The Diagnosis Analysis of "5·6" Strong Convection in Chongqing
下载PDF
导出
摘要 2010年5月6日凌晨重庆发生一次强对流过程,该过程造成了雷暴、冰雹和大风等强烈天气。利用常规资料、多普勒雷达资料和1°×1°NCEP再分析资料,对这次强对流过程进行诊断分析。结果表明,850 hPa暖舌和700 hPa冷空气是此次强对流天气过程的环流背景;低能舌叠加在高能舌之上,导致对流不稳定,地面中尺度锢囚锋和975 hPa辐合线的辐合上升运动触发对流不稳定能量释放,产生强对流;低层正涡度和辐合带对应的非常好,低层辐合、上层辐散有利于强对流的产生和发展;850~200 hPa有较强垂直风切变,特别是低层和高层有较强的垂直切变,中层有微弱的切变,更有利于强对流的发展和维持;雷达回波分析发现,造成重庆大风冰雹灾害的为超级单体。 One strong convective process occurred in Chongqing province in the morning on May 6,2010.The strong convective storm caused thunderstorms,hailstorms and gale.The conventional weather observations,the data of Doppler radar and the 1°×1° re-analysis data of NCEP were used to analyze the event.The results indicated that the warm tongue at 850 hPa and cold air at 700 hPa were the circulation background of the strong convective storm.The low energy tongue located above high energy tongue caused atmospheric convective instability,the air convergence and rising motion produced by mesoscale occlusion front and low pressure trough at the 975 hPa triggered convective instable energy released so as to produce strong convective storm;the positive vortex corresponded to the convergence area.The convergence in the lower layer and divergence in the upper layer were conductive to the generation and development of strong convection;there was strong vertical wind shear in 850-200 hPa,especially strong vertical shear in the lower and higher layer and mild change in the middle layer,which was conductive to the development and maintenance of strong convection;radar echo analysis suggested that supercell form caused hailstorm in Chongqing.
出处 《安徽农业科学》 CAS 北大核心 2011年第15期9093-9098,9108,共7页 Journal of Anhui Agricultural Sciences
关键词 强对流 诊断分析 垂直风切变 触发机制 中尺度锢囚锋 Strong convection Diagnosis analysis Vertical wind shear Trigger mechanism Mesoscale occlusion front
  • 相关文献

参考文献11

二级参考文献123

共引文献256

同被引文献40

引证文献4

二级引证文献21

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部