J4 ›› 2009, Vol. 27 ›› Issue (2): 127-134.

• 论文 • 上一篇    下一篇

甘肃陇南地震灾区2次暴雨过程的诊断对比

马敬霞肖志强魏邦宪   

  1. 甘肃省陇南市气象局,甘肃武都 746000
  • 收稿日期:2009-03-20 修回日期:2009-04-27 出版日期:2009-06-30 发布日期:2009-06-30
  • 作者简介:马敬霞(1983-),女,甘肃静宁人,助理工程师,主要从事现代天气预报技术研究.E-mai:l majx06@ lzu. cn
  • 基金资助:

    2008年甘肃省气象局青年科技开发基金资助

Diagnosis and Comparison ofTwo Sim ilar Storm Cases in Longnan Earthquake Disaster Area

 MA Jing-Xia, XIAO Zhi-Jiang, WEI Bang-Xian   

  1. (LongnanMeteorologicalBureau of Gansu Province, Wudu746000, China)
  • Received:2009-03-20 Revised:2009-04-27 Online:2009-06-30 Published:2009-06-30

摘要:

利用常规气象资料和NCEP再分析资料,对2008年6月30日和7月21日发生在陇南灾区的2次暴雨过程进行诊断对比分析。结果表明:“6. 30”暴雨过程的主要影响系统是切变低涡,水汽条件和能量条件都相当好,但垂直上升运动不太剧烈,致使陇南灾区达到暴雨标准的站数相对较少;“7.21”暴雨的主要影响系统是高原低涡,能量条件不如“6. 30”暴雨充分,但水汽及垂直运动条件较好,形成暴雨的3个条件基本满足,致使陇南灾区50%以上的站达到暴雨标准。而暴雨的成灾程度与暴雨中心落区有密切关系。

关键词: 暴雨过程, 诊断分析, 甘肃陇南灾区

Abstract:

Based on the conventional observations andNCEP reanalysis data, the two similar storm cases occurred on June 30 and July 21, 2008 in Longnan disaster areawere diagnosed. The analytic conclusions are as follows: The shearing low vortexwas themain influence system of“6. 30”heavy rainfal,l but less ascendingmotion resulted in less stations’s precipitation up to 50 mm. The plateau low vortexwas themain influence system of“7. 21”storm rainfal,l because ofbettervapor condition and strong vertical ascendingmotion,the precipitation in 50 percent stations ofLongnan region wasmore than 50 mm during“7. 21”storm rainfal.l The relation is in evidence between the loss from heavy rainfall disaster and the center area of rainfall

Key words: Longnan disaster area, heavy rainfal, l diagnostic analysis

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