J4 ›› 2011, Vol. 29 ›› Issue (4): 472-477.

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Analysis on a Regional Rainstorm in Gansu Province in 2010

LIU Xinwei1,DUAN Haixia2,ZHAO Qinyun1   

  1. 1. Lanzhou Central Meteorological Observatory,Lanzhou 730020,China; 2. Institute of Arid Meteorology,CMA; Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province; Key Open Laboratory of Climatic Change and Disaster Reduction of CMA,Lanzhou 730020,China.
  • Received:2011-03-24 Revised:2011-07-22 Online:2011-12-31 Published:2011-12-31

2010 年7 月甘肃一次区域性暴雨分析

刘新伟1 ,段海霞2 赵庆云1   

  1. 1. 兰州中心气象台,甘肃兰州; 2. 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
  • 作者简介:刘新伟( 1981 - ) ,男,山西省文水县人,主要从事短期预报工作.
  • 基金资助:

    中国气象局预报员专项项目“2010. 7. 22 大暴雨分析”及教育部高等学校科技创新工程重大项目培育资金项目“干旱半干旱区
    典型极端天气事件形成机理研究”共同资助

Abstract:

 Based on precipitation observations from automatic meteorological stations in Gansu Province,NCEP/NCAR 1° × 1° reanalysis data and infrared satellite cloud pictures observed by FY - 2C,a regional rainstorm event occurred on 27 and 28 July 2010 in eastern Gansu Province was analyzed. Results show that the rapid develpment and moving westward of the continental high cut off the short wave trough in eastern plateau and formed the cut - off low,which resulted in this regional rainstorm weather event. Strong precipitation intensity and a long lasting time caused the large accumulated rainfall. The“Chanthu”typhoon maybe strengthened the rainstorm magnitude.

Key words:  rainstorm, automatic weather station, satellite cloud pictures

摘要:

利用甘肃省自动站降水、NCEP/NCAR 1° × 1°再分析资料、FY - 2C 卫星云图等资料,对2010年7 月22 ~ 24 日甘肃东部发生的区域性暴雨天气过程进行分析。通过对高空天气形势、多种物理量场以及卫星云图等数据从不同角度对此次暴雨过程进行分析。研究表明: 此次暴雨天气过程是由于大陆高压的快速发展西进,切断高原东部的短波槽造成切断低压引起的; 降水强度大、持续时间长是造成累计大降水的主要原因; 另外台风“灿都”的存在也在一定程度上加强了暴雨量级。

关键词: 暴雨, 自动站, 卫星云图

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