J4 ›› 2009, Vol. 27 ›› Issue (4): 327-333.

• 论文 • 上一篇    下一篇

喇叭口地形对一次暴雨影响的数值试验

段海霞刘新伟   

  1. (1.中国气象局兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,中国气象局干旱气候变化与减灾重点开放实验室,甘肃 兰州 730020; 2.兰州中心气象台,甘肃 兰州 730020)
  • 收稿日期:2009-09-09 修回日期:2009-11-10 出版日期:2010-12-30 发布日期:2009-12-30
  • 作者简介:段海霞(1980- ),女,甘肃金昌人,硕士,研究方向为天气动力学.E-mai:l dhx8199@ hotmai.l com
  • 基金资助:

    干旱气象基金项目(TAMKY200603、IAM200718)和甘肃省气象局项目(2008-04)共同资助

Num ericalExperim ent ofTrumpet-shaped Topography Influence on a Heavy Rain

 DUAN Hai-Xia1, LIU Xin-Wei2   

  1. (1.Institute ofAridMeteorology, CMA; KeyLaboratory ofArid Climatic Change andReducingDisaster ofGansu Province,
    Lanzhou730020,China;2.Lanzhou CentralMeteologicalObservatory, Lanzhou730020, China)
  • Received:2009-09-09 Revised:2009-11-10 Online:2010-12-30 Published:2009-12-30

摘要:

对2006年8月27~28日甘肃省中南部大暴雨过程进行数值模拟,模拟结果较好地复制了此次暴雨过程以及与之相联系的影响此次过程的中尺度对流系统的发生、发展过程。喇叭口地形使甘谷降水增加明显,抬高地形对地形迎风坡上空低层辐合及上升运动有显著的加强作用,且其动力抬升作用主要体现在降水发生前和发生时。

关键词: 暴雨, 喇叭口地形, 中尺度对流系统, 数值试验

Abstract:

Theweather systems and a relatedmesoscal convective systems, causing severe heavy rain in the south-eastGansu Province during 27-28 Aug 2006, are successfully simulatedwithMM5 models. Trumpet-shaped topography prominently increased rainfall in Gangu county. The rise of the terrain enhanced the low level convergence and verticalmovementover thewindward side of the terrain.The dynamical enforced rise of the terrain emerged at the prophase and the time of the rainfal.l

Key words: rainstorm, trumpet-shaped topography, mesoscal convective systems, numerical experiment

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